What boost do people run in stock engines ?

[Hawk]

Just trying to get an idea of how strong the honda engine is. I was particular interested in how much boost people where running through their stock engines with bolt on turbo kits ? And how much this would increase with the use of a decompression plate ?

Other peoples experiences and heart aches can shed alot of light (and also save from heart aches) on the 'amatuer' scene.

Thanx heaps in advance
FastAz

[DLO01]

I am running 9psi on my B16A2. No mods done to the motor.

[ProECU]

I am running 9psi on my B16A2. No mods done to the motor.

dude
what issues (if any) have you had at 9psi? What kinda HP/Torque you putting down at that psi?

Cheers
Ev

[DLO01]

dude
what issues (if any) have you had at 9psi? What kinda HP/Torque you putting down at that psi?

Cheers
Ev
Hey Ev, no issues or concerns. B16A can take 9psi comfortably with the right setup/tune. Not sure about torque, but mines outputing 135kw/181hp @ wheels. :p

[poid]

10psi on the F22B1, but compression isnt a concern on this engine

[JDM.Power]

replying 2 hawk post..il say around 6-9psi is good an safe..any more than that do some work to the internals

[Weq]

decompression plates will always let u run more boost. but u make less power... but u have less chance of detonation though..

[ProECU]

decompression plates will always let u run more boost. but u make less power... but u have less chance of detonation though..

I disagree with the detonation comment. Decompression plates decrease quench efficiency....increasing the chance of detonation.

I personally wouldnt bother with a thicker headgasket. Why run more boost to make the same power?

[VTi-RT]

B16A's should run 10psi stock without any problems.

My gf D16Y8 has been running 14psi stock, but had head lift problems. ARP bolts and got the block o-ring'ed and that fixed the problem. The car was pulling 155kw to the wheels. D16Y engines do have lower comp (my case 9.4/1) so you can always run a bit more boost.

[BLKCRX]

I'v pushed the limts of many b16 engines on the dyno street and track all for research and blown many b16 engines.. and learnt more than you could ever read in any book.

Stock Engine 7 - 9 psi holding boost for 30 seconds at 8000rpm no problem

Stock Engine 7 - 9 psi holding boost for 50 seconds at 8000rpm = Engine go BANG

Stock Engine 11 psi holding boost for 15 seconds at 8000rpm exhaust temp = very hot

Stock Engine 12psi holding boost for 13.5 seconds at 8000rpm = Engine go BANG

Stock Engine Ramp Dyno run 14.7psi (1bar) daily driven 2000 rpm to 9000rpm (not holding load / boost ) = engine is perfect

Its all how its tuned and how you drive / apply boost. Constant boost will kill almost any engine... whats the weakest part that breaks... ? hmm thats my research......

Regards James

[Weq]

I disagree with the detonation comment. Decompression plates decrease quench efficiency....increasing the chance of detonation.

I personally wouldnt bother with a thicker headgasket. Why run more boost to make the same power?

the same reason why everyone doesnt run 18psi at 11.1:1 compression. less volatility, less heat, less damage when detonation occours... well thats the way i have understood it - internet mechanic style.

[pornstar]

i run 12 psi daily on b16a and the b18c vtir

[huytek]

d16y8 = 6psi = daily driving = no problems at all

[joyride]

brothers ex-gf (HA!) ITR runs 4 pounds (low) and 9 pounds (high).
sock internals, methanol injection.

[WPN.22R]

i was running 15psi all day everyday in my h22a with stock internals (except for 2mm head gasket).

150kw atw 10psi not revving past 5000rpm (vtec) whilst running the engine in.

[Fattony]

the same reason why everyone doesnt run 18psi at 11.1:1 compression. less volatility, less heat, less damage when detonation occours... well thats the way i have understood it - internet mechanic style.

Keep your mixtures on the safe side, make sure you dont over advance your timming, make sure that your fuel system is more than capable of doing wat you ask of it (i.e dont run your injectors at max duty cycle), use decent fuel and detonation shouldnt be to much of a concern. Hell you could blow a motor on 2psi if you really wanted to arse up the tunning.

[Weq]

Keep your mixtures on the safe side, make sure you dont over advance your timming, make sure that your fuel system is more than capable of doing wat you ask of it (i.e dont run your injectors at max duty cycle), use decent fuel and detonation shouldnt be to much of a concern. Hell you could blow a motor on 2psi if you really wanted to arse up the tunning.

well im talking about stock internals. a small bit of detonation at high compression = cracked something. on the other hand, a small bit of detonation at lower compression = less damage if any. espically with street fuel, nothing is going to be perfec all the time, no matter how good u tune it. SO i think it would be possible to get a bit MORE hp out of a stock engine with a lower compression, daily.

[crispy]

Oh k.. so i have a da9 LS with a b18a1 which has done 150k, now if i were to boost my car with lets say a t28, on stock internals, then how much boost could i run reliably without problems? and how much of a power gain would i be looking at? let me know becos im curious about this

[ProECU]

you guys underestimate detonation issues at best!
Detonation will destroy any motor, regardless of compression.

In a stock internal motor, it is my opinion to run less psi boost, lower psi = lower ambient temperatures= place engine under less stress.
Its not only the pistons you need to worry about, more psi = more heat = greater chance of farking rods & valves too.

for me, there is only 1 real solution, more power at less psi is a win win! especially with stock internals

[Macros]

I thought the ammount of pressure an engine could take was determined on how large the turbo is.

[Q_ball]

is it possible to run 15psi on stock internals on a B18B, only new thing bein a head gasket to lower compression?

[incoming]

brothers ex-gf (HA!) ITR runs 4 pounds (low) and 9 pounds (high).
sock internals, methanol injection.

dyno run @7psi showed 104kw, 300+Nm from memory

[ProECU]

I make 151kW @ 4psi stock B16

[Weq]

so around 20kw per/psi? nice gains.

[DLO01]

I make 151kW @ 4psi stock B16
Show off! :p Come up to Brizzy and tune my car Ev. :thumbsup:

[shecomb]

Stock H23 internals and 6psi no probs....

[poweredbyhonda]

What u smoking Pornstar?? Can I have some too!
PROECU seems to be on the ball as compared to everyone else. I'm no mechanic but I have been there, done that. How can people claim to run over 7 psi daily (constantly boosting because Hondas have high comp don't forget, also not driving like panzies) and not expect to blow something up?
The lowest boost possible with the best safest power gain is the way to go on stock motors. Don't go putting in a thicker head gasket or decomp plate without thinking about using stronger head bolts. The stock ones will stretch which will in the end cause more damage to the motor. We all get the boost bug and forget the real deal when turboing an N/A car made only for N/A.
Just my 2 cents for newbies.

[ProECU]

Thanks for the compliment, I just hope the newbies take the advice on board !

[pornstar]

I smoke da stalker :)

depends on the ecu and tuning, but ive seen 12 psi daily. U know the prelude did it dave, so what u smoking?

[Spoon-Accord]

on h22a.. a few people told me to run stock psi.. which is about 6-7 psi..


due to the fact h22a's have weaker internals than other engines in honda family :d

Kenny

[Hawk]

Thanks heaps for all the info and replies.

Just very roughly (very very roughly) What boost do u think I 'should' be able to run 'safely' ??

B20A (stronger pistons, rods, and bolts)
Laser cut decomp. plate
Microtech engine managment
FMIC
A more than capable fuel system.

Just a 'rough' daily driver P.S.I.

Thanx Heaps
FastAz

[ProECU]

I wouldnt boost a B20A PERIOD !

If you must, then keep it low. The geometry of that motor is very bad.

[Mr. Focus]

ok. alot of talk is directed towrds 'b's, so what about d's......especially d16a8's

[jimmeh]

tim ward with ice boy b16a did 14pound

[reyesone]

when people talk about upgrading internals what exactly are the internals that need to be upgraded? pistons, rods, valves.........what else??
sorry to hijack post. please pm if possible

[poid]

dude if you are changing the pistons you dont need a decomp plate, just get the right pistons instead. Also with that kind of money invested, might wanna look past a microtech.

Anyhow, a guy i know used to have a boosted B20A which made over 450hp, he lunched one engine before he got it right though

[Hawk]

The '89 SI Prelude' was bought for a steal as a unfinished project (run out of money ..... same as everyone else) All the internal engine work was already done (with reciepts for $6700) I am just trying to get an idea of how NOT to destroy the engine with excessive boost etc.

What tuners do u guys use and recomend in the Brisbane area ?? Thanx for the assistance and info.

FastAz

[poid]

Its quite simple, to not destroy the engine use a a good tuner. The internals, if they are forged, will handle whatever boost you throw at it. Just make sure its tuned right, and it wont (shouldnt) grenade.

Out of interest, what colour is the car? I'm wondering if its an "unfinished project" car that i am thinking of

Cant help with brissie tuners though, bit too far south for that...sorry!

[CHU85]

if its built, then just boost it over 20psi.
It should handle it pretty easily.
My engine has held up for about 3 months now and i run 21-25psi on the weekends.

[garett]

i have never thought about turbo ing the b16a
but it sounds like it would be good at 9 - 10 psi
135kw at the wheels is great!!

[franki]

what boost should u run safely on a stock internal k20a dc5r? :honda:

[civ_sik]

i would run below or around 10 maybe a bit more maybe abit less depending on what you want it for... my opp

[[DC2]]

12psi on my b18c2

[buz138]

Was running 10psi and blew a head gasket on a ED civic..... :(

[frozenchook]

Its quite simple, to not destroy the engine use a a good tuner. The internals, if they are forged, will handle whatever boost you throw at it. Just make sure its tuned right, and it wont (shouldnt) grenade.



to add to this, make sure you have an adequate fuel setup (bigger injectors if needed and a bigger fuel pump - you could cheat with a malpassi regulator also) as this is the downfall in many turbo cars, which results in a little friend called melty (piston)

im currently looking into turbo setups for my da9 (i miss boost :() and id say on a stock engine 8-9psi will be enough

[kerim]

can anyone help me?
with a b18c with a basic turbo kit..t3/t4, manifold,piping, cooler, fuel reg, fuel pump, bigger injectors and a decomp plate
would this be safe? also and approx power figure?

[Aza]

more info needed... sure it would be safe depending on the psi u r putting through the engine, but i dont think that is really ur q? are u asking how much psi u could run with a setup like that? or are u asking if that setup sounds safe? take a look at DLO01 build up in apperance section might give u some ideas.

[kerim]

more info needed... sure it would be safe depending on the psi u r putting through the engine, but i dont think that is really ur q? are u asking how much psi u could run with a setup like that? or are u asking if that setup sounds safe? take a look at DLO01 build up in apperance section might give u some ideas.

what i meant was yeah, does it sound safe.

[Aza]

there is plenty of info on this siite regarding this, do a bit of research, a basic turbo on a B18C would be safe and reliable done right. just take the time, read around, know what ur aiming for and then purchase parts accordingly. just make sure u have a realistic aim in mind.

[kayot1k]

why do people always say shit like im running a "b16a or similar" and got these parts etc... how much power/boost can i run ? its just like say why is an orange and orange.

i dont think just putting a list of parts etc.. on ur car will result in any figures i.e that ur motor will run 20 psi or its gon get 135kwatws or watever. maybe theoretical value but that means squat.

talk to your tuner or potiential tuner and see what he/her thinks after they've had a look at it and also do ur research so that ur tuner doesnt take u for a ride.