H22A on stock internals

[EGlude Attitude]

So I'm real new to this board, I was a member on this board before but I lost my name and password all that good crap, etc. Anyway I've got a '92 Civic Sedan with H22A swap and considering buying a Full-Race turbo kit (GT2871R turbocharger Stage 1 kit) come tax return season. So the question I'm getting at is whats the most boost you can push on stock H series internals? I've seen 5psi and heard the limit was like 7psi. I assume somewhere on here someone knows somebody or has or had a boosted H-series. Thanx, Chris

 

[stealthy]

h22s have very thin cylinder walls.personally i wouldnt run more than 5-6psi on a GOOD tune.be carefull.

 

[Jezek]

Yeah thats about right...I would NOT go over 7 no matter what......if anything just do it right the first time and build it

 

[T!mmy]

not to thread jack but...as far as a b16a (1st gen or w/e) what would be a safe amount to run while not babying it? I want to say I remember reading 6-8 lbs for the b18 but I didnt know if it'd be different for the b16

thanks

 

[Project Dc2]

same for b16. its all in the tune.


realistically you can push almost anymotor provided it has an excellent tune. matt from one-fab tuned his stock h22 by st00pid to 430 WHP and he dogged the s**t out of it. eventually it went loose cuz of some messed up valvetrain. no way am i telling you to run this much power on a stock block. just staating it can be done. you just have a very small window for error.


on a b16a WITH PROPER TUNING ( I.E on a dyno. with a wideband. ECU. laptop. good tuner. not FMU bs not VAFC etcc) will take 300 WHP easily and safe 300 WHP is approx 12 psi with a b16. depending on turbo you use.

 

[stealthy]

300whp on stock b series is not uncommon,however that is with a very good tune.im a firm believer in "its all in the tune".

 

[T!mmy]

but b-series also have stronger cylinder walls correct?

 

[stealthy]

but b-series also have stronger cylinder walls correct?

correct

 

[Mr.Luder]

What is a "GOOD TUNE"?

 

[stealthy]

a tune from somebody that is highly respectable for tuning,somebody that knows what the hell they are doing,somebody that has done alot of it......thats a good tune in my book.

 

[Mr.Luder]

a tune from somebody that is highly respectable for tuning,somebody that knows what the hell they are doing,somebody that has done alot of it......thats a good tune in my book.

yea exactly...! but thats not wut i mean..i hear people say tune ur turbo tune this tune that...how the heck do u tune the turbo? with what? especially on a obd2 h22a4. i was thinkin i would just slap on a turbo with waste gate set at 7psi... and thats it

 

[stealthy]

you definatly need to do alot of research on boosting.but ill get you started VERY briefly and quick.

to tune,you need to chip your ecu with SOMETHING (depending on what obd you are,determines your options)then someone takes that program,makes correct air fuel ratios,fuel amounts,vtec crossover,basically changes EVERYTHING your ecu normally does,but changes it so that it reacts its best with the mods you have done.it is mod specific,as well as tuner specific.tuning your car,even if its not boosted (but modded with ANYTHING) will help extract more power,not to mention make things alot safer and reliable.

 

[Mr.Luder]

you definatly need to do alot of research on boosting.but ill get you started VERY briefly and quick.

to tune,you need to chip your ecu with SOMETHING (depending on what obd you are,determines your options)then someone takes that program,makes correct air fuel ratios,fuel amounts,vtec crossover,basically changes EVERYTHING your ecu normally does,but changes it so that it reacts its best with the mods you have done.it is mod specific,as well as tuner specific.tuning your car,even if its not boosted (but modded with ANYTHING) will help extract more power,not to mention make things alot safer and reliable.

finally words i can understand! simple..THanks

 

[Destroy]

Its not the walls you have to worry about, its the weak stock ring lands. You need forged pistons, but you cant run them with the stock FMR sleeves, so your gonna end up sleeving the block.

 

[stealthy]

Its not the walls you have to worry about, its the weak stock ring lands. You need forged pistons, but you cant run them with the stock FMR sleeves, so your gonna end up sleeving the block.

yes,yes it IS the walls you need to worry about,as well as the ringlands.


and yes,to run forged pistons in a h series you have to sleeve it

 

[Revolver]

What is a "GOOD TUNE"?

Maintaining a good air fuel ratio throughout the rpm range to create the maximum or desired performance levels while avoiding two things. That the engine isn't running too lean which will cause the piston(s) to expand from overheating and scuff the cylinder wall(s), unburned fuel is important because it absorbs a lot of heat. Also to make sure the engine isn't running too rich which can kill performance. In addition to fuel tuning, ignition tuning is also parmount. Too much delay you can have detonation and you might burn up a valve or even a turbine with exhaust tempuratures that are too high. Too much advance can create maximum cylinder pressure at the wrong time which can do a number of things like bend rods and lift heads off the block. If I remember correctly its 12-18 degrees ATDC where you what maximum cylinder pressure to occur (please correct me If I'm wrong).

 

[Mr.Luder]

so wut product do i use? i mean do i use something like the vafc and how do i know if im running rich or lean

 

[Shiznit]

a flat a/f ratio is a good tune

so wut product do i use? i mean do i use something like the vafc and how do i know if im running rich or lean

with a wideband o2 sensor. a vafc is not going to give a good tune.

 

[T!mmy]

how about finding someone in your area to do the tune? Or does someone have a place in TX that provides a good tune?

 

[EGlude Attitude]

Wow, this is going to be way more complicated than I expected. I mean I was assuming I could bolt on the turbo kit, richen it up and drive it to a shop in Indianapolis I trust and have them tune it. All I have is a V-AFC and a Pyrometer at this point but I'm not sure what kind of ECU chip I would buy. I had a friend with Uberdata and that seemed to work well. How high of EGT's are we talking about before you get into serious engine meltdown. I've heard anything above 1,375 degrees. Dunno if thats right though.