9000 rpm in stock dc2 itr?

[davemaca]

Hello fellas, new to the forums. Old honda owner. I currently have a dc2 itr. Engine mods are HKS hiper cat back exhaust, Trust Airinx Filter, Magnaflow High flow cat. I was reading in a another forum that the ITR cuts out at 8500 rpm. I know mine revs to cutout at 9000 rpm in all first 4 gears (haven't got that far in 5th) and VTEC cuts in at 6000 rpm. Any ideas or explanations?

[IRI]

I've never ventured to far into the revs, but without taking any notice i once looked down at the tacho and it was just over 9000 without any cut out. Now i take more notice, and try not to go over 8000rpm.

[IRI]

But then I read this:

dc2r wrote:
Yes, this can be the fact for the DC2R also. The redline is at 8400, then the cutout is at 8500. But if you drive your car hard, then the momentum of the needle gets pushed further (physics) and it looks like it cuts out at 8700 or 8800. You shouldn't really be cutting out your revs, but sometimes you get into it so much that you 'accidentally' over rev and it happens.


That is true in the case of instrument clusters with needles driven by coil-pack and spring. Some instrument clusters are driven by stepper motors that don't have momentum swing.

I believe that DC5R and DC2R instrument cluster needles are cross-coil & spring which exhibit momentum swing if the needle accelerates through the dial fast enough. That's why although the display of DC5R fuel-cut out may sometimes display 8000 8100 or 8300, the actual engine fuel cut-out is 7,900rpm




So who the fjck knows how many rpm the engine is actually doing at a point in time????

[tinkerbell]

dont believe the stock tacho, is what i have heard...

[ArSe]

maybe its had the ecu done? first owner? or second?

[Jim80y]

Stock tacho is usually off a couple hundred RPM. Keep revvin to find out where fuel cut is :)

[davemaca]

Im the second owner, bought it from honda dealer with 15k on the clock a couple of years ago, so i don't think the ecu has been touched. As for the tacho dial momentem theory, it does it in 3rd and 4th. Maybe the tachos out or maybe I have a particulary good factory engine.

[wynode]

Regardless of the 'factory good engine' it will be electronically limited to 8,500 (or whichever number).

What DC2R said soudns right.

[davemaca]

Thanks for the help guys. Guess I'll just keep reving to 9000 indicated, lol.

[majic777]

aparently the US dc2r's redline was 8400rpm, cutout was 8500rpm.. and aussie dc2r's redline 8400, cutout 8900rpm. one of my friends has a dc2r and it definatley doesn't cut out until a whisker under 9000rpm

hope that helps!

[alan]

stop saying appearntly, maybe, etc and measure it wif an rsm of sumfing dat has a peak reading

[hondaboy]

i thrashed my friend's DC2R once and i noticed that the tacho reading at cut-out was (or perhaps seemed) lower in neutral than at cut-out in 1st, 2nd or 3rd. ( didnt manage to hit rev limiter in 4th :( )

in neutral it looked like it was was 8500rpm on limiter, and while driving looked like it went up to 8900rpm

perhaps the ecu has different cut outs dependent on engine load?

[wynode]

Why are you reving to redline in neutral ? :|

[EG_2_TEG]

don't tell me u've never his rev limiter in neutral :P

[Civic Type R]

My B16A2 cuts out at 8700 stock. Im sure the B18c7 would definately cut out at atleast 9000.

Yes even i have revved to rev cut in neutral many times.
Ti loves it :twisted:

[hondaboy]

Why are you reving to redline in neutral ? :|

"why not?" is my answer ;)

[tinkerbell]

don't tell me u've never his rev limiter in neutral :P

i have never hit the rev limiter in neutral.

[tinkerbell]

Why are you reving to redline in neutral ? :|

"why not?" is my answer ;)

cause it is easier to break shit on a free revving engine as opposed to one under load.

dont tell me you didnt know that?

[vti-2]

Well, he did say he thrashed his friend's DC2R once...


thrashed my friend's DC2R once and i noticed that the tacho reading at cut-out was (or perhaps seemed) lower in neutral than at cut-out in 1st, 2nd or 3rd. ( didnt manage to hit rev limiter in 4th )

in neutral it looked like it was was 8500rpm on limiter, and while driving looked like it went up to 8900rpm

So it's safe to say he really didn't give a shit what happened to it. Or he is just a plain noob and didn't know you shouldn't redline it in neutral. Or both. :shock:

[gelo]

[quote="Civic Type R"]My B16A2 cuts out at 8700 stock. quote]

doesnt then b16a cut out at 8400?
mine does anyway

[EG_2_TEG]

http://www.teamintegrated.org/random/B16A2.avi

let the vid reveal all :)

[hondaboy]

until something breaks, i will keep revving to limit in neutral just for fun

ps. dont worry little boys, ill inform all of you when something goes BANG next time
pps. feel free to call me an idiot :)

[hondaboy]

So it's safe to say he really didn't give a shit what happened to it. Or he is just a plain noob and didn't know you shouldn't redline it in neutral. Or both. :shock:

i would go with the first option bro, i didnt give a shit :(

[tinkerbell]

in a B16A, the ecu should cut the fuel injectors at 8200rpm,

in a B16A2 the ecu should cut the fuel injectors at 8400rpm.

whether the engine is allowed to free spin past this point is entirely dependant on the physics of momentum and friction.

ie there is NOTHING to stop the engine from continuing to accelerate besides friction (or the clutch engaging).

so in many cases the engine might continue to accelerate past the fuel cut off point because of physics if free spining...

that is one reason a fuel cut out or spark cut cannot protect an engine from mis-shifts...

that said - anyones B16A2 engine that continues to spin upto 8700rpm must be using really thin oil!!!

[tinkerbell]

i would go with the first option bro, i didnt give a shit :(

wotta dickhead! :thumbsdown:

[hondaboy]

now now tinkerbell :cry:
i just think we have different levels of respect for engines 8)
if i drive a car and the motor blows then it becomes my problem not yours
and all i can say is that im yet to learn from my mistakes

[tinkerbell]

now now tinkerbell :cry:
i just think we have different levels of respect for engines 8)
if i drive a car and the motor blows then it becomes my problem not yours
and all i can say is that im yet to learn from my mistakes

CONGRATULATIONS!!!

http://www.slightlywarped.com/forumpictures/positivepics/YOUROCK!.jpg

[vti-2]

Let's keep this on topic. If you guys want to argue, do it via PM or something. Don't hijack someone elses thread.

[tinkerbell]

sorry.

[hondaboy]

my deepest apology :(

[ginganggooly]

heh... i was told (by james) that 9k rpm's was safe for my b18c2 valvetrain. i was highly skeptical at first, but i must say that i have hit -an indicated- 9.2k several times, and never had a problem.
if my car can handle that, i'd imagine a type-r probably could too.

[tinkerbell]

heh... i was told (by james) that 9k rpm's was safe for my b18c2 valvetrain. i was highly skeptical at first, but i must say that i have hit -an indicated- 9.2k several times, and never had a problem.
if my car can handle that, i'd imagine a type-r probably could too.

i am not sure anyone is saying that it couldn't?

[majic777]

everyone seems to say that revving an engine to redline in neutral or with clutch in is bad for the engine... but think about this, when you're racing, track/street/twisties/whatever... when you heel toe revmatch on downchanges, that is FREELY REVVING THE ENGINE WITHOUT LOAD, often upto and beyond redline, and your engine takes that hundreds of times during a race. If its built right, and you're not exceeding the rpm your engine is built to handle, should be ok

thas just my thoughts anyways ;)

[Civic Type R]

http://www.teamintegrated.org/random/B16A2.avi

let the vid reveal all :)
I do believe this is my tacho from my civic there :)
OK i am happy to accept the engine cut off is 8400 not 8700 as originally noted. I had a close look at the avi and the many dyno charts to arrive at my answer.

[Civic Type R]

btw check out my dyno chart from the link below.

http://www.dohc-vtec.com.au/pages/linked/civic-gets-exhausted.htm

It clearly identifies power is still being made all the way into redline until fuel cutoff. This trend is also found in 3 other dyno runs on separate dynos.

[Xenon]

Hrmmm

I thought the topic was about dc2r not b16

[tinkerbell]

everyone seems to say that revving an engine to redline in neutral or with clutch in is bad for the engine... but think about this, when you're racing, track/street/twisties/whatever... when you heel toe revmatch on downchanges, that is FREELY REVVING THE ENGINE WITHOUT LOAD, often upto and beyond redline, and your engine takes that hundreds of times during a race. If its built right, and you're not exceeding the rpm your engine is built to handle, should be ok

thas just my thoughts anyways ;)

um, if you have to rev the engine upto the rev limiter on heel/toe shifts - you are probably doing it wrong...

BTW - i think we are talking about 'rev limiter', not 'redline'

[MURCHO]

where does the DC5 ITR engine rev to??? and where is it safe to rev it to???

[Civic Type R]

Omar/Igs, i noticed that in Marz' old R from Sports compact, that .avi showd it cut out @ 8400.(redline)
Was that correct ?

[MURCHO]

anyone know???

[EG_2_TEG]

Omar/Igs, i noticed that in Marz' old R from Sports compact, that .avi showd it cut out @ 8400.(redline)
Was that correct ?

nah, i told the idiot to take it to limiter, but he didn't want to
not like it was his car
f*&khead i tell ya :evil:
then the next run, when i was outside the car he takes it to limiter

[vuvu]

everyone seems to say that revving an engine to redline in neutral or with clutch in is bad for the engine... but think about this, when you're racing, track/street/twisties/whatever... when you heel toe revmatch on downchanges, that is FREELY REVVING THE ENGINE WITHOUT LOAD, often upto and beyond redline, and your engine takes that hundreds of times during a race. If its built right, and you're not exceeding the rpm your engine is built to handle, should be ok

thas just my thoughts anyways ;)

um, if you have to rev the engine upto the rev limiter on heel/toe shifts - you are probably doing it wrong...

BTW - i think we are talking about 'rev limiter', not 'redline'

why would it be wrong to rev the the engine upto limiter on heel/toe? thats the whole point of heel toe.. to keep the revs up to maximum... maybe a *little* harsh on engine but the hondas can handle it... i see it on BMI a lot

i know it doesn't feel right hitting the limiter in neutral.. but i don't really see why it would hurt the engine more so than wen u hit the limiter in 1st or 2nd or 3rd... if anything wen u hit the limiter in neutral u don't leave it there for too long (unless ur a fuken idiot) where as wen u hit the limiter in 3rd for example.. the revs would be very high for a longer period of time (i.e 8000-8400 rpms before hitting the limiter), hence having a higher chance of breaking something
but then again i guess if your car is super responsive (i.e mines 34 response monster) the revs would climb so quick in neutral that bang a piston would fly thru the bonnet and into low earth orbit

haha.. yeah just thought i'd post wat i was thinkin
peace

[tinkerbell]

um, if you have to rev the engine upto the rev limiter on heel/toe shifts - you are probably doing it wrong...

BTW - i think we are talking about 'rev limiter', not 'redline'

thats the whole point of heel toe.. to keep the revs up to maximum...

no it is not.

it is to match the engine revs to the road speed and associated gearing.

[tinkerbell]

BTW - if you really think you know about circut racing from watching BMI videos, then dont even bother to reply...

[pornstar]

bah bring it on dave, ill go ya ;) haha jk, im in 2nd year of my internet mechanics course :P

[vuvu]

hhaha alrite sick kunt
true that it is to match engine speed and road speed... but they do it only at high revs to keep the revs up to max right? i don't see them doing it at 4000 rpms

and also i refer to BMI because they are the only kunts who drive alot of high revving vtec monsters

?_?