Turbo VTEC questions

[iamhappy46]

As a few of you may know, I am building a Individually Constructed Vehicle(a Garaiya) using a Nissan SR20VET(NEO VVL + Turbo) motor and Nissan FWD gearbox, mounted into the rear like an MR2.

This is the specs for the stock engine cams:
http://image-cache.boostcruising.com/database/readersrides/files/post-50117-11543385381809921956.jpg

Regarding all the boosted VTEC engines on this site, do you switch the cams as per normal rpm switch or switch the cams once the inlet manifold sees positive boost?

Do you use the low lobe to spool the turbo up faster? then the hi lobe for higher air flow?

What sort of cam specs is everyone else using?

Info from K20A+T owners would be appreciated.

[saxman]

you do two dyno pulls, one with only the low cam engaged, and one with only the high cam engaged. The two dynos are overlayed, and the vtec engagement is set where they overlap(or slightly lower with a bit of tweak to timing to smooth it out, but basically at the overlap).

This method will give you the optimal power from each cam as you're really narrowing down where one becomes less efficient than the other.

[iamhappy46]

Thing is, the new turbo won't spool on the hi-lobe alone. It needs the low rpm lobe to generate enough exhaust flow to spool the turbo up :(

Looks like I have some experimentation to carry out. I need to pass a 'smog test' with this engine, so I was thinking that the low lobe for manifold vacuum up to 0psi and then hi lobe for boost would be a good idea.

[Limbo]

if you need to pass epa just make sure you have a proper exhaust

[string]

Thing is, the new turbo won't spool on the hi-lobe alone. It needs the low rpm lobe to generate enough exhaust flow to spool the turbo up :(

Looks like I have some experimentation to carry out. I need to pass a 'smog test' with this engine, so I was thinking that the low lobe for manifold vacuum up to 0psi and then hi lobe for boost would be a good idea.
0psig in the manifold will happen as soon as you go full throttle. You obviously cannot do a full power run with just the low, then just the high then see where they cross over. It is a great idea in theory, where cars magically tune themselves perfectly, but it's just not viable to do if you care about your time at all. Just have a reasonable guess, and if power is dropping off just after the cross-over, then up it a little; similiarly in reverse.

[saxman]

you can't do one completely with just the low and then the high, but say your expected cross over is somewhere between 3500 and 5500, you could do a run switching cams at 3000 and another run switching cams at 6000

[iamhappy46]

It needs an exhaust emissions check(NOx, CO2, CO, etc) for the ICV to pass engineering.

The car has an electronic throttle body, so I can control the inlet manifold pressure to regulate 0psi(as much air as the engine can use) then once I am ready to increase boost, the ECU can open the throttle body fully and act as a 'boost controller' by limiting airflow if/when required.

Yes, I am making it more complex than it has to be but hopefully, the results will be worth it. Basically, the SR20VET was the last SR20 derived motor that Nissan built and is the only turbo charged engine that passed the much stricter Japanese exhaust emission laws. I am trying to emulate their tuning philosophy in an 'attempt' to get my engine passed.

[Boost]

hi iamhappy46.
Are you planning on building it from scratched? i.e. chassis, donor engine, donor sussy etc etc? Have you looked into ADR emmissions regulations applied on ICV's? I dont think its possible to get it engineered and road registered if your planning on boosting a stock engine. Its already hard enough as it is with getting a stock engine into an ICV and getting it registered let alone a boosted one. For example a stock 4age 20V running the standard ecu cannot be used on ICV even tho they have been proven to pass emmissions under the ADR 79/01 code. There is a new ADR out now as well. Let us know how its goes mate.

[string]

hi iamhappy46.
Are you planning on building it from scratched? i.e. chassis, donor engine, donor sussy etc etc? Have you looked into ADR emmissions regulations applied on ICV's? I dont think its possible to get it engineered and road registered if your planning on boosting a stock engine. Its already hard enough as it is with getting a stock engine into an ICV and getting it registered let alone a boosted one. For example a stock 4age 20V running the standard ecu cannot be used on ICV even tho they have been proven to pass emmissions under the ADR 79/01 code. There is a new ADR out now as well. Let us know how its goes mate.
Any links to where I can find emissions regulatins for ICV's?

That's pretty damn stupid the with the 4age. If the rta genuinly cared about emissions they'd make people pay extra for ****in imitation 4x4's which chew through 4 times the fuel that a 4ag will.

[sivic]

hi iamhappy46.
I dont think its possible to get it engineered and road registered if your planning on boosting a stock engine.

the SR20VET is a turbo engine from the factory, so he is planning on using a stock engine
came in the XTrail GT.

[[[d a n n y]]]

Garaiya?
as in the GT300 Garaiya?

[iamhappy46]

I have a wreck of a Garaiya on its way from Japan(arrives this week) I have already started building a chassis and will fit the Garaiya body onto my chassis with a S15 Silvia headlights, Mazda Series 8 RX7 rear lights and some custome fibreglass.

The GT300 Garaiya is a race version of the street driven version in the pics below...

Chassis uses R32 Skyline adjustable wishbones, coil overs, brakes(R34), adj. castor rods, etc so I can fine tune the suspension. Should weigh in just over 800Kg and my engineer is happy to pass a 2L turbo as a street driven car with that weight/brake setup.

I am using my spare factory SR20VET engine but the engine is far from stock. It should hopefully pass all relevant testing though but time will tell. It will be on the dyno this week

http://f5.putfile.com/5/14807434429.jpg
http://f5.putfile.com/5/14807451626.jpg
http://f5.putfile.com/5/14807523266.jpg
http://f5.putfile.com/5/12803040778.jpg
http://forum.pulsar.org.au/attachment.php?attachmentid=27299&stc=1&d=1152147891
Damn that looks sexy
http://forum.pulsar.org.au/attachment.php?attachmentid=27300&stc=1&d=1152147891
Where did I put those Kleenex?

[timofytit]

I have a wreck of a Garaiya on its way from Japan(arrives this week) I have already started building a chassis and will fit the Garaiya body onto my chassis with a S15 Silvia headlights, Mazda Series 8 RX7 rear lights and some custome fibreglass.

The GT300 Garaiya is a race version of the street driven version in the pics below...

Chassis uses R32 Skyline adjustable wishbones, coil overs, brakes(R34), adj. castor rods, etc so I can fine tune the suspension. Should weigh in just over 800Kg and my engineer is happy to pass a 2L turbo as a street driven car with that weight/brake setup.

I am using my spare factory SR20VET engine but the engine is far from stock. It should hopefully pass all relevant testing though but time will tell. It will be on the dyno this week

http://f5.putfile.com/5/14807434429.jpg
http://f5.putfile.com/5/14807451626.jpg
http://f5.putfile.com/5/14807523266.jpg
http://f5.putfile.com/5/12803040778.jpg
http://forum.pulsar.org.au/attachment.php?attachmentid=27299&stc=1&d=1152147891
Damn that looks sexy
http://forum.pulsar.org.au/attachment.php?attachmentid=27300&stc=1&d=1152147891
Where did I put those Kleenex?

I want one

[Weq]

imhappy, i have no idea where u got the idea the low cam was bad for boost and high cam wouldnt spool a turbo, but you are wrong. Follow saxman's advice, its how we have been doing it for years. every engine is different, every setup will flow differently.

[iamhappy46]

I am basing that 'theory' on the stock SR20VET ECU mapping and switch points. It 'appears' Nissan did it this way to allow the car to pass the newer japanese emission laws and yet manage 309Nm of torque@3200rpm.

I am using the low rpm lobe to make the bigger turbo less laggy. The plan is/was to have the ETB restrict air flow to 0psi before 4000rpm, therefore I could have the car 'streetable' by shifting at 4000rpm and engaging the next gear at 3000rpm.

From there, I hope to gradually open the ETB from 4000rpm to 6000rpm with cam switch point somewhere in there, so that it builds boost/torque output gradually and remains driveable.

From 6000rpm to rev limiter(8000rpm) I an unsure how that will turn out, as there is so many variables in relatively unchartered Nissan territory.

The motor was on the engine dyno yesterday and got the idle to 4000rpm range tuned. Basic figures: 274Nm of torque at 4000rpm, with 115Kw@crankshaft without an alternator or p/steering pump load. Torque peaked at around 3600rpm with 288Nm on the low lobe only with only 0psi(had to trim the ETB back above 3600rpm as a boost limiter)

I doubt this turbo could spool up before 7000rpm running on just the hi lobe, so I believe a traditional 'intersecting the graphs method' would not really work in this application. Admittedly, I could switch the high lobe on at 4000rpm now and then see how the turbo spools from there, then intersect the graphs then.

Guess I am after an engine that is torquey, driveable and street/emissions legal but I will have a video/results late next week on how the engine performs.

[iamhappy46]

Have also been investigating fitment of a Honda K20A + FWD 6 speed + Hondata ECU to the chassis with JDM DC2 headlights/brake lights or something for the 'Honda connection'

Still using the Nissan double wishbone suspension but it should theoretically work with custom billet driveshafts to adapt the Honda inner CV's to the Nissan outer CV's.

[Dxs]

it looks sexy yet you are gonna put s15 lights etc on???

do a good write up of all this stuff man..
seems interesting

[iamhappy46]

Still building the chassis and the S15 headlights are about the only ones that are mass produced and would suit the front end design. I am open to suggestions on what to use though...

I have a 5 page writeup on the PGA forum about the car.

My only concern is camshaft selection, as I had 3 sets custom made and I am in relatively uncharted territory for a Nissan. I am currently on the middle set for testing purposes.

[iamhappy46]

The chassis has been built and the car has seen the dyno a few times already. Had trouble initially, as the rolling diameter of 19" rims and the gear ratios meant it had to be tuned in 3rd gear. This caused a lot of wheel spin(265/35R19) at any more than 9psi as the car still does not have a body. Weighs in at around 500Kg so it bucks a lot on the dyno, which has allowed the ratchet straps to break a few welds in the rear end :(

On 9psi, I was limited to 268.8Kw@wheels but running 16psi, some 17" rims, good quality tyres and using 4th gear netted over 350Kw@wheels not to mention broken chassis welds and a gearbox that makes more noise than a box of nails in a paint mixer :(

Currently chasing a new gearbox but my options are limited :(

Besides that, it handles alright with stock R34 shocks/springs, has plenty of go and lots of WHOA!

The front end is using 2005 Toyota Camry Sportivo headlights, Mazda 6 MPS brake lights and BMW 3 series guard repeaters. Should look nice once completed :)

[ProECU]

I doubt this turbo could spool up before 7000rpm running on just the hi lobe, so I believe a traditional 'intersecting the graphs method' would not really work in this application. Admittedly, I could switch the high lobe on at 4000rpm now and then see how the turbo spools from there, then intersect the graphs then.

Have you considered running the fuel fat at given rpm's and pull timing in those same areas to increase combustion temps and hence improve spool?

Your tuner should be advising you of these techniques.... if they know whats going on of course.

[iamhappy46]

Trying to pass exhaust emissions so that was not an option. It appears to be working well now although the drive by wire technology makes the system a little 'doey' going from closed throttle to 'full accelerator pedal' and waiting for the throttle to open. Makes it jerk a little but some fine tuning might get rid of it.

I should mention that I am using E85(85% Ethanol) which appears to be working well. A lot cheaper in a 44 gallon drum than my local petrol prices :)

There is a video available of the car on the dyno as well. Let me know if your interested in viewing it :)

[ProECU]

yup, interested, link me

[Zilli]

link would be nice

[silver_screen]

Im assuming that its a 4valve per cylinder engine just like all the other sr20s... I read that u were sayin something about running on just the high lobe?? My impression (havent seen a sr20vet yet) was that the rocker arm is locked into place via oil pressures or electrically to ride the hi cam... which means that ur low lobe isnt connected.. the hi lobe moves 2 intake valves to let air in.. having the smaller lobes runnin wouldnt work because they move the same 2 valves... plus once runnin on the hi cam the small lobes wouldnt b able to touch the rocker arm regardless. What turbo r u thinkin of using?? I was goin to run a GT30R turbo on my last NORMAL sr20 and that wouldve made plenty boost well before 7k... I havent had much tuning experiance but turbo selections and engine buildings i do pretty much every @ work and at home... stock cam profiles r kinda nice too lol :)

[yourfather]

...... um dude, he posted cam specs in post #1. if you can't tell how many valves are in an engine by looking at cam specs... you shouldn't say "I'm assuming"

[silver_screen]

you must be stupid. hondas have 3 lobes like every other lift controlled engine out there... but we have 2 valves. Learn ur shit b4 u make urself look stupid. the nissan motor may have 5 valves per cylinder. who knows

[yourfather]

serious man, if you haven't figured out by now that the there's a primary, secondary and vtec lobe and that dohc vtec engines are 4 valves per cylinder, then you have no place posting in this forum.

[silver_screen]

2 vavles for intake moron. and dohc cams having 4 valves is another stupid statement to make. I dont know if this still applies but going back maybe 5-6 years ago, i did a head on a yamaha. 5 valves per cyl, dohc. 3 intakes 2 exhaust
and what does 3 lobes on a cam have anything to do with what my question was??

like i said b4... do ur research b4 u make urself look stupid

[yourfather]

um, there's two camshafts, so actually, there's an intake and exhaust cam.

both have three lobes per camshaft, and there's two cams per cylinder. that is why it is called double overhead cam. 2 intake valves, 2 exhaust valves...



.................................................. .......................

and your post didn't ASK a question.

[aaronng]

2 vavles for intake moron. and dohc cams having 4 valves is another stupid statement to make. I dont know if this still applies but going back maybe 5-6 years ago, i did a head on a yamaha. 5 valves per cyl, dohc. 3 intakes 2 exhaust
and what does 3 lobes on a cam have anything to do with what my question was??

like i said b4... do ur research b4 u make urself look stupid
Engines with variable lift have 2 intake valves because there isn't space to locate a high lift camlobe if you require 3 low lift lobes to drive the 3 intake valves.

Yamaha's 5 valve engines, including Toyota's 4A-GE 20V don't come with variable lift.

Since the Nissan engine in question is a VVL, then it would be 4 valve.

Even Ferrari, who used 5 valves per cylinder in the F355 has gone back to 4 valves in the F430 because they are using variable lift in it.

[silver_screen]

of course aaronng knows whats going on.. atleast he has a clue

yes the yamaha didnt have variable lift because ur right.. space would b very tight indeed. Now that i know for sure the Nissan has 4 valves, u couldnt run low and high at the same time because they all run the same intake valves. Meaning once the high cam is engaged the low cams dont do anything at all.

Im glad u know whats going on dude, unlike the other guy

[yourfather]

he told you in a nice way to stfu silver_screen.

[aaronng]

I don't care who started this fight, but the both of you better pipe down, otherwise I'll lock this thread to cool things down.

Yourfather, stop egging him on.

[iamhappy46]

Im assuming that its a 4valve per cylinder engine just like all the other sr20s... I read that u were sayin something about running on just the high lobe?? My impression (havent seen a sr20vet yet) was that the rocker arm is locked into place via oil pressures or electrically to ride the hi cam... which means that ur low lobe isnt connected.. the hi lobe moves 2 intake valves to let air in.. having the smaller lobes runnin wouldnt work because they move the same 2 valves... plus once runnin on the hi cam the small lobes wouldnt b able to touch the rocker arm regardless. What turbo r u thinkin of using?? I was goin to run a GT30R turbo on my last NORMAL sr20 and that wouldve made plenty boost well before 7k... I havent had much tuning experiance but turbo selections and engine buildings i do pretty much every @ work and at home... stock cam profiles r kinda nice too lol :)

An SR20VET is actually a lot like a B16A VTEC engine but 2 litres and with factory boost. NEO VVL is Nissan version of VTEC.

I am already running a GT42R which with the drive by wire throttle body is proving to make the car exciting to drive, especially with a welded diff :p I am trying to get enough traction to get it tuned for 23psi soon but a forced holiday from driving means testing has been put off until next month :(

I have a GT30 on my X-Trail which has a SR20VET motor from factory and it spools hard below 3000rpm without a problem.

[silver_screen]

hahah yer GT30s on sr's rock :) He can stir all he wants dude. end of the day i know my shit because i have to and he can only guess and get it wrong anywayz hahah :)

GT42R.. thats rather large for a tiny motor im gonna run one of those on my rotor :) or maybe 2 :D

Whats a stock SR20VET make??? im expecting it make more than the DET... as much as the GTiR one thou?

u know what... tell me everything about this engine :)

[iamhappy46]

On 6psi(ECU controleld boost), the SR20VET makes 206Kw(280PS or 276HP) stock@flywheel at 6400rpm, using a GT28. More importantly, it makes 309Nm of torque@3200rpm! The VET motor has 9.1:1 compression stock. It is horribly detuned from the factory as well, as it is mated to a 4 speed CVT 4WD transmission.

GTiR needs 10.5psi to make less than 180Kw@flwywheel and only 8.3:1 compression stock.

The only problem with the SR20VET engine is that they are as rare as hens teeth. Last time on sold in America, it was around US$10,000...

My X-Trail GT is pumping out 254Kw@all four wheels so these motors do have a lot of potential. The low lobe actually allows the VET motor to spool up much bigger turbos. Here is some X-Trail GT footage:
CVT Auto in 2nd Gear
http://www.users.on.net/~noelsilv/auexyforum/files/Xtrail_GT_2.mpeg
CVT Auto in Drive
http://www.users.on.net/~noelsilv/auexyforum/files/Xtrail_GT_D.mpeg
Notice in drive it does the 0~100Km/h sprint in under 6 seconds and that is STOCK!

Had bandwidth problems with the project cars video, will get it fixed soon or just upload one of the newer videos.

[aaronng]

^^ links don't work.

[iamhappy46]

Video links fixed

[silver_screen]

very impressive i must say :) but the low lobes arent connected to anything when the high cam is engaged. it is impossible unless each lob has its own valve, which it doesnt. If only u were here in melb id come past when the motor was apart... i wanna have a look @ the VVL setup just to be 100% that im correct :D

[aaronng]

very impressive i must say :) but the low lobes arent connected to anything when the high cam is engaged. it is impossible unless each lob has its own valve, which it doesnt. If only u were here in melb id come past when the motor was apart... i wanna have a look @ the VVL setup just to be 100% that im correct :D
It depends on the variable cam profile system. Most VTEC and VVL systems use 1 solenoid to lock up both sides of the rocker arm to the middle large lobe. In this case, you are right, the low lobes don't do anything when in high cam.

Not sure if Nissan came up with something similar, but Honda made a 3-stage VTEC system in the D series. Using 2 solenoids, the 1st would lock up one side of the rocker arm to the large lobe at the 1st RPM point, leaving the other valve to run on the small lobe. The 2nd solenoid's function was to lock that other arm to the large lobe once the 2nd RPM point was reached.

[iamhappy46]

very impressive i must say :) but the low lobes arent connected to anything when the high cam is engaged. it is impossible unless each lob has its own valve, which it doesnt. If only u were here in melb id come past when the motor was apart... i wanna have a look @ the VVL setup just to be 100% that im correct :D

No, the low lobes are not connected to the camshaft when the hi lobe is activated. The centre hi lobe is pushing down the centre rocker which is connected to the outer low lobe rockers, which are what push down the valves.

http://www.floridasr20s.com/gallery/albums/album66/DSC04273.jpg
(Pic from sr20forum)
You can see the 3 rockers per cylinder under the exhaust camshaft. The two outer rockers push down the valves but when the 3 rockers are locked together, they follow the centre 'hi' lobe as it pushes the outer rockers down further than the outer 'low' lobes can.

Also notice the superior timing chain design to other SR20 motors. No start up rattle and no chain stretch!

[silver_screen]

That picture shows me that the low lobes ride the hi lobe.. which means that once the hi lobe comes into the play.. the low lobes dont operate as per normal anymore.. meaning that the valve will now open higher and for longer because of the hi lobe.

What im sayin is that once the Hi lobe has engaged, the low lobes dont have anything more to do how high the valve will open and for long... They dont do anything for turbo spool times because its the hi lobe thats actually controlling the lift and duration of the valves... and as it seems its on both, intake and exhaust.. i must say, very stout head design. Only difference i can see with the chain design is that its thicker.. nothing else. everything else looks the same as my old 180 in the chain department ;)

Looks great!

[silver_screen]

It depends on the variable cam profile system. Most VTEC and VVL systems use 1 solenoid to lock up both sides of the rocker arm to the middle large lobe. In this case, you are right, the low lobes don't do anything when in high cam.

Not sure if Nissan came up with something similar, but Honda made a 3-stage VTEC system in the D series. Using 2 solenoids, the 1st would lock up one side of the rocker arm to the large lobe at the 1st RPM point, leaving the other valve to run on the small lobe. The 2nd solenoid's function was to lock that other arm to the large lobe once the 2nd RPM point was reached.


Ahhh i see, how very interesting. So you could pretty much control the lift and duration of either intake valve with these 3 stage vtecs... Both lo lobes r the same profile thou arent they?

The Nissan head doesnt seem to have the extra stages of valve control.. By the looks of the pic, they r either on or off. Only way to know for sure is to have the head right infront of me :)

[bloodsword27]

wow...nice machine!

[iamhappy46]

Ahhh i see, how very interesting. So you could pretty much control the lift and duration of either intake valve with these 3 stage vtecs... Both lo lobes r the same profile thou arent they?

The Nissan head doesnt seem to have the extra stages of valve control.. By the looks of the pic, they r either on or off. Only way to know for sure is to have the head right infront of me :)

The 3 stage Honda VTEC motor actually has the first stage where only one intake valve opens and both exhaust valves(basically a 12 valve motor) This promotes cylinder swirl and allows the engine to have 18:1 AFR's up until about 3000rpm. From here, the first solenoid engages and locks the two outer rockers together so that the previously closed valve follows the first stage lobe. The the 3rd stage from above 6000rpm follows the middle lobe.

[silver_screen]

yer ive read about that tech.. In the D17 engine i think??

[iamhappy46]

That picture shows me that the low lobes ride the hi lobe.. which means that once the hi lobe comes into the play.. the low lobes dont operate as per normal anymore.. meaning that the valve will now open higher and for longer because of the hi lobe.

What im sayin is that once the Hi lobe has engaged, the low lobes dont have anything more to do how high the valve will open and for long... They dont do anything for turbo spool times because its the hi lobe thats actually controlling the lift and duration of the valves... and as it seems its on both, intake and exhaust.. i must say, very stout head design. Only difference i can see with the chain design is that its thicker.. nothing else. everything else looks the same as my old 180 in the chain department ;)

Looks great!

The low lobe actually works from idle to about 4800rpm. Once oil flow locks the two outer rockers to follow the centre rocker, then the hi lobe controls both valves together. If they are not locked, then the two low lobes push the valves as per a normal 16 valve motor.

The low lobes(on my new custom camshafts) give much better low rpm exhaust gas flow and help get exhaust gas spinning the GT42R from around 3000rpm!

Note that the stock exhaust camshaft specs list lift/duration although this is not the case due to the lash pad design/shape.

The SR20VET timing chain is not actually thicker but it does use more rows(5) instead of the regular single row chain that all SR20DE/DET motors use due to the cam gear design.

[iamhappy46]

yer ive read about that tech.. In the D17 engine i think??

First used in the EK Civic actually in a D15B motor :)

http://asia.vtec.net/article/d15b/

[aaronng]

Ahhh i see, how very interesting. So you could pretty much control the lift and duration of either intake valve with these 3 stage vtecs... Both lo lobes r the same profile thou arent they?

The Nissan head doesnt seem to have the extra stages of valve control.. By the looks of the pic, they r either on or off. Only way to know for sure is to have the head right infront of me :)
There was only 1 D series engine with this 3 stage VTEC. And that engine, both low lift lobes were the same. So the only difference between this and DOHC vtec is that there is an intermediate 1-low, 1-high valve setting.



What im sayin is that once the Hi lobe has engaged, the low lobes dont have anything more to do how high the valve will open and for long... They dont do anything for turbo spool times because its the hi lobe thats actually controlling the lift and duration of the valves... and as it seems its on both, intake and exhaust..

In low lift mode, it's purpose is to promote quick cylinder filling and efficient combustion at low RPM. So you get more exhaust gas than when compared to running high-lift mode at low RPM where you have incomplete combustion due to lower filling efficiencies from using such a high lift (bigger entrance cross-section, hence lower than optimum velocity).

More exhaust gases means quicker turbo spooling.

[iamhappy46]

^^ That is also why running the car with hi-lobes locked in to see where the two torque graphs intersect would not work. The hi-lobes would not spool such a big turbo as even with hi-rpm, the exhaust wheel inertia was not already moving from low rpm/low lobe so turbo lag was excessive.

In the end, it worked out alright. Just need a better gearbox to handle the torque output :(

[yourfather]

yeah, because you won't have the airflow to get the wheel spinning...

I guess the solution to that is to run from a point where you get turbo to spool up as late as possible (crossover), and plot that, and then effectively reduce rpm of crossover point until you get a fair idea of where the valve timing is going to be more beneficial.. so rather than having two intersecting curves, you'll get a normative baseline of what the engine would do from low rpm, late crossover point, and hopefully, as you decrease the rpm of the crossover, you'll find that there will be a shift upwards in the power curve.

and once you stop seeing any benefit in reducing timing, that would be your optimal point.

[silver_screen]

If u want ur turbo to spool up quickly down low, introduce some NOS :)

That'll get the biggest of turbos spooling up fairly quick, but only use it to spool it up, otherwise ur cylinder pressures will get too high and ull have some nasty, conrod breakin deto happening :P

[iamhappy46]

My motor has forged internals and would happily run with NOS, as the engine should take around 28psi, so 16psi + NOS would be fine. However, as the engine is designed to be street legal, I would never use it. The motor is tractable and there is no real need for NOS when I still have another 2 sets of aftermarket cams to try.

The camshaft engagement points may not be perfect but the drive by wire seems to even out any holes in the torque output. I am currently considering what gearbox setup to use that will handle such an excessive torque output :(

[iamhappy46]

http://img2.putfile.com/thumb/5/14102094035.jpg (http://www.putfile.com/pic.php?img=5507668)

Car will be in Sydney this week. SCR800 is the name of the car(not road registered yet) with 917Nm of peak flywheel torque and over 760Nm from 6000rpm to 8500rpm. 807Kg street legal weight with around 800Hp@flywheel in current emissions friendly tune. Race ready weight will be around 740Kg + driver weight :D

Gearbox is a 6 speed mid engine RWD style gearbox(essentially a rear mounted FWD gearbox) with a helical LSD, made by GKN. Clutch is a custom twin plate 5.5" clutch setup, with an auto flex plate ring gear to start the car. Flywheel and clutch assembly weigh 7Kgs all up ;)

0-160km/h runs have been consistently in the hi 5's and low 6's, depending on how the 315/25R19's hook up and the T/C settings in the ECU. Hoping to get to Oran Park one weekend for a track day, to find any possible kinks in the suspension settings and see if the engine or mechanicals misbehave.

Should see the more of the kit cars rolling out shortly. One SCR250(250Hp SR20VE engine) is currently undergoing the approval process for Qld, with another being built with an SR20DET at the moment for a customer. Also looking at fitting a K20A to one in the next few weeks as the engine bay has plenty of room. Kit price is around $20,000 or around $40,000 mark for a turn key car.

Organising a website shortly to have more pics/videos/etc

[nd55]

> 917Nm of peak flywheel torque

Isn't this considered herecy on a Honda forum?




Amongst all the squabbling about cams and lobes somebody forgot to say....


WOW!!!

[barefootbonzai]

:confused: I have metal problems. :confused:

OMG someone ban this mofo's ass

[90-POV]

yeah bro ur mentally unstable

[Kawasaki]

http://img.photobucket.com/albums/v677/YonasLiu/stillcantseeshitcaptain.jpg

[iamhappy46]

You guys are so smart, open your eyes... the car is real.

Don't need your immature pathetic crap in another thread.

[fishman]

lmao, open their eyes? Y don't you post up some pics of the car or something. Where is it?
.
.
.
.


http://img.photobucket.com/albums/v677/YonasLiu/stillcantseeshitcaptain.jpg

[90-POV]

dude, of course the car is real....
thatz bcoz ur imagining things
stooge

[barefootbonzai]

You guys are so smart, open your eyes... the car is real.

oh no doubt it's real. but you've meet your match! you ain't got shit on Roger Cordia aka KING CORDIA.

http://www.ozhonda.com/forum/showthread.php?t=60981

http://www.youtube.com/watch?v=0R2vsS_iZig

http://cgi.ebay.com.au/Cordia-SECRET_W0QQitemZ230135183133QQihZ013QQcategoryZ104 00QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&ih=011&sspagename=STRK%3AMESE%3AIT&viewitem=&item=320119659730&rd=1&rd=1

[iamhappy46]

Yeah, I own an imaginary kit car that has a clear as day picture of the interior, showing the gear selector going to the back of the car and the seats from the Autobacs Garaiya. Yeah, it is a Photochop of an imaginary car.

[ginganggooly]

I recently got my Enzo delivered... I bought it off a venture capitalist that lost his fortune and had to get some money in a hurry. I got it for a steal (1.3 mil AUD). I found it a little underpowered, so i got a "grasping at straws" quad turbo kit for it. Should be good for 1400 ponies at the crank. Quick in a 1100kg car let me tell you.

Here is a picture of my airvent to turn all the doubters into believers.
http://www.seriouswheels.com/pics-def/Ferrari-Enzo-Console.jpg

[90-POV]

Yeah, I own an imaginary kit car that has a clear as day picture of the interior, showing the gear selector going to the back of the car and the seats from the Autobacs Garaiya. Yeah, it is a Photochop of an imaginary car.

then show us some pics with ur ugly retarded face in it

[Kawasaki]

http://i22.photobucket.com/albums/b339/kawasaki_au/invisiblecar.jpg

[barefootbonzai]

ginganggooly, i totally doubted you for a sec then. Lucky you had an interior pic to back up your claims. Quad turbo should be full sick.

imhappy46 bro i didn't know you were a famous actor, so many talents, just WOW :eek:

[superR]

oh no doubt it's real. but you've meet your match! you ain't got shit on Roger Cordia aka KING CORDIA.

http://www.ozhonda.com/forum/showthread.php?t=60981

http://www.youtube.com/watch?v=0R2vsS_iZig

http://cgi.ebay.com.au/Cordia-SECRET_W0QQitemZ230135183133QQihZ013QQcategoryZ104 00QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&ih=011&sspagename=STRK%3AMESE%3AIT&viewitem=&item=320119659730&rd=1&rd=1


funniest shit i have heard in a long time ....I'd never race him in a turbo R ;)

[ginganggooly]

oh no doubt it's real. but you've meet your match! you ain't got shit on Roger Cordia aka KING CORDIA.

http://www.ozhonda.com/forum/showthread.php?t=60981

http://www.youtube.com/watch?v=0R2vsS_iZig

http://cgi.ebay.com.au/Cordia-SECRET_W0QQitemZ230135183133QQihZ013QQcategoryZ104 00QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&ih=011&sspagename=STRK%3AMESE%3AIT&viewitem=&item=320119659730&rd=1&rd=1

bwaaahahahahahhahaa
love it:thumbsup:

[Sexc86]

geeze man i cant believe these guys are still roaming and polluting our forems with this crap

[Muzz]

Wow, nice project man! Have always been keen to do my own locost clubman kit car, but probably never will at the rate my current project is going.
Im keen to see some more piccys or even that dyno run vid, just upload it to photobucket if your havin trouble hosting the vid.

[Muzz]

hey where did he go? if i was doing waht you are id be keep to show everyone my handywork. Wheres the pickies??

[Muzz]

http://img2.putfile.com/thumb/5/14102094035.jpg (http://www.putfile.com/pic.php?img=5507668)

Car will be in Sydney this week. SCR800 is the name of the car(not road registered yet) with 917Nm of peak flywheel torque and over 760Nm from 6000rpm to 8500rpm. 807Kg street legal weight with around 800Hp@flywheel in current emissions friendly tune. Race ready weight will be around 740Kg + driver weight :D

Gearbox is a 6 speed mid engine RWD style gearbox(essentially a rear mounted FWD gearbox) with a helical LSD, made by GKN. Clutch is a custom twin plate 5.5" clutch setup, with an auto flex plate ring gear to start the car. Flywheel and clutch assembly weigh 7Kgs all up ;)

0-160km/h runs have been consistently in the hi 5's and low 6's, depending on how the 315/25R19's hook up and the T/C settings in the ECU. Hoping to get to Oran Park one weekend for a track day, to find any possible kinks in the suspension settings and see if the engine or mechanicals misbehave.

Should see the more of the kit cars rolling out shortly. One SCR250(250Hp SR20VE engine) is currently undergoing the approval process for Qld, with another being built with an SR20DET at the moment for a customer. Also looking at fitting a K20A to one in the next few weeks as the engine bay has plenty of room. Kit price is around $20,000 or around $40,000 mark for a turn key car.

Organising a website shortly to have more pics/videos/etc

Weird, i had a look through your photo album - http://www.putfile.com/iamhappy46/images/66170. Why do you have only 1 small low quality pick of the interior of your kit car^^^, but have like 7-9 photos of your pulsar and a shit load of pics of other peoples cars???

Seems really odd that you dont have a ton of pics of it:confused:

[krogoth]

lol

this shood be interesting

[Muzz]

Yeah, I own an imaginary kit car that has a clear as day picture of the interior, showing the gear selector going to the back of the car and the seats from the Autobacs Garaiya. Yeah, it is a Photochop of an imaginary car.

i belive you man, its hard though lol. Why even try and back yourself up with words when you could prove it so quickly with a few pickies of the build up. Or any other pics of it for that matter, im sure you would of taken tons of your pride and joy built with you own workmanship and hands:thumbsup:

Wouldnt it feel nice to pwn all the people calling bullshit on your ass, theres nothing stopping ya bud, if you are actually telling the truth....

If you are bullshitting, then i really dont thing you can call yourself iamhappy46, happy people dont need to bullshit about their life simply to impress people. Thats just straight up weirdo shit!

Just egging you on bud, no hard feelings im just dying to see the pics of your kit car which seems more and more like bullshit the longer we go without any pickies of the thing:thumbsup:

[Muzz]

Hey bud, i just came across your other thread - http://www.ozhonda.com/forum/showthread.php?t=36526

dude, i really think its time to change your name to Iamultimateweirdowithafakelifeandsuperduperimagina rycars,doyouknowanygoodmentalwards46

[Muzz]

OK then, i just read through the above thread completly.
Iamhappy46, im not paying you out, im not being crewl, your not normal you NEED help, for your own good. Id hate to see you spend the rest of your life, making up stories then defending them with lies and excuses as in that thread and this one (also plenty others on PGA).

The above thread was spanned over more than a year, you couldnt provide
1. A time slip
2. Any photos that provide an insite into your drag car (an outside photo of a stock looking car, and a cold air intake in the bumper even though your running itbs:confused: dosnt cut it)
3. Any results from the drag strip for your car, even after a year had passed, you only time slip was ruined with oil APARENTLY.
4. Not one single person can verify your car exists, even those who know you
5. I would say you made a MINIMUM 100+ excuses in the above thread on why you couldnt show up to the drags/didnt have dyno graphs/mphs didnt add up to the whp/car wasnt around. etc.
6. You REFUSED to take pics of your engine bay, incase somone stole your ideas lol, btw it would be very hard to copy your manifold from an engine bay shot, why not spent 2mins on MS paint and block out the stuff you consider groundbreaking and unheard of.

You are a serial liar, its obvious to so many people.
What you are doing is weird, you obviously have serious issues, i feel sad for you, please seek help. I cant imagine for the life of my why somone would go about making things up to impress others, especially when it requires you to lie through your teeth 100+ times, over a whole year, making excuses why you cant back up your claims. Here you are doing it ALLL over again....

Im not going to visit this thread again, i know perfectly well you cant provide photos of your kit car, im certain on my life it dosnt exist. Im not prepared to listen to another hundred more excuses why you cannot back up what you are saying with any sort of proof. Let me guess, you cant get photos because ................................................. You fill in the blank.

Talk to somone about your issuses, do yourself a favor.

[incoming]

isnt iamhappy46 same as honda enthusiast, honda skywalker and IAMVTEC?

[barefootbonzai]

lol, i could name a few more.

[krogoth]

was that necessary?

[Muzz]

was that necessary?

Not really, he just like enjoys acting like a smart ass though, let him be;) .

[EuroAccord13]

Ok that's enough, everyone gets a benefit of a doubt....

Even TO THOSE IMMATURE ONES...:)

IF YOU HAVE NOTHING TO SAY... THEN DON'T... Stop being Keyboard Warriors hiding behind the screen....:)



Threadstarter, when you are ready to display your car, PM me and I'll open the thread for you.... :)

For now, this will remain CLOSED...