pros and cons of boosting an h22
 

Ive recently got a new car its an h22 93 hatch very clean and fun car pulls nice n/a but i miss boost.. whats the ups and downs of boosting an h22?? how much hp are the stock blocks good for( needs to be really reliable, so now pushing it ) its a strong good runing motor just needs so boost O0

Re: pros and cons of boosting an h22
 

also what are the stock injectors good till?

Re: pros and cons of boosting an h22
 

pros = boosted hondas twin cams go fast

cons = hotrex has herpes

Re: pros and cons of boosting an h22
 

lol after doing a few pages of research looks like 250 is easly and reliable :6

Re: pros and cons of boosting an h22
 

they're good to the last drop....like Folgers!!

Re: pros and cons of boosting an h22
 

THere's only positive stuff about bosoting the h22.

Just get at least a stage 3 t3/t4 or a borgwarner rhb62. The usual junk yard T3's are too small.
Injector wize, forget about the DSM blue tops....you need 550 ccm minimum and you will almost max them out at 8-9 psi. Oh, and tune it with anything allowing to draw your own fuel and timing curves, such as uberdata or crome. No piggy back systems on this nice engine please!

Re: pros and cons of boosting an h22
 

cons:

if you really wana go big, you will have to resleeve. even if you dont go big, its good to relsleeve the block for reliability. FRM sleeves suxors. as long as you have a strong tune tho, you should be good for a while.

Re: pros and cons of boosting an h22
 

yeah my ecu is already chipped and ready to tuned on crome ;D also it will be tuned by a very good tuner... im not looking to push the motor at all... just get something more out of it... maybe a set of dsm's will be ok for 5-6 pounds

Re: pros and cons of boosting an h22
 

I have a set of 560cc evo injectors for sale.
Boosted H22's are awesome. Even cooler since it's in a hatch.

Re: pros and cons of boosting an h22
 

with a walbro 255 fuel pump, 450cc injectors max out near 300whp. I'm sure they'll be fine for your 5-6psi goals.

Re: pros and cons of boosting an h22
 

actually this thread brings up a question that i had the other day....

i've heard about the whole "you have to resleeve an H22 if you do pistons". Why is that. Is the whole block aluminum? Does it have to do with the closed deck?

Re: pros and cons of boosting an h22
 

fiberized FRM sleeves... aftermarket moly rings will eat them alive.

there is one forged piston manufacturer that builds pistons specifically for the stock h22 sleeve, mahle i think.

Re: pros and cons of boosting an h22
 

yeah i think i read about those pistons actually...

wtf is a fiberized FRM sleeve?

Re: pros and cons of boosting an h22
 

mahle gold series pistons are supposedly FRM compatable, i havent heard many good or bad reviews as of yet though

Re: pros and cons of boosting an h22
 

FRM sleeves are actually stronger than iron sleeves the problems with boosting an H22 will be failure of the ringlands. I've seen two h22's crack lands at 5 psi. One was a rev hard kit it was a show car and rarely driven (lasted 1.5 yrs) the other was turbonetics driven moderately hard (lasted 3 months) both engines had under 60,000 mi.
Don't be surprised when they go, not saying it'll will definatly happen just saying it may.

Re: pros and cons of boosting an h22
 

ok maybe I have calculated this wrong but as per RC engineering injectors flow rate calculation sheet
http://rceng.com/technical.htm#WORKSHEET

450 ccm injectors, at 50 psi of fuel pressure, 80% duty cycle and BSFC of 0.65, will support no more than 226 HP..... that leaves the DSM injectors a good choice for only the D series , LS engines and such.

so in theory, for 350 HP (around what you get with 8-9 psi on a well tuned stock h22) if you don'T want to crank up fuel pressure and duty cycle to unsafe levels, you would need 700 ccm injectors. THat'S just theory though. But in real life, i have always maxed out 550 ccm's on h22's at around 8-9 psi. That's what's stopping me to keep cranking up the boost up.
MAybe the BFSC is more like 0.55-0.60 on a boosted h22.... that would make more sense.

Re: pros and cons of boosting an h22
 

that doesnt sound to cool... i love to beat on my cars and dailey them...were these cars on a good tune?

Re: pros and cons of boosting an h22
 

Nothing but pros for the boosted h22. (soon to be.) :6

Re: pros and cons of boosting an h22
 

Thats a problem with all honda pistons, not just h22's...but we still manage to tune them well and run them a long time. I assume your 'revhard kit' included a sweet FMU.

Theories are a fantastic good time, yet I prefer to go with my own real world experience. I've tuned plenty a 450cc injector + honda 4 banger setup. Those that could handle near 300whp, went near without any trouble from the injectors so long as we had a walbro in the tank.

Re: pros and cons of boosting an h22
 

i have a set of mahle gold series pistons in my h22 they been in for the last year im runnin 11psi on a 62-1 i never dynoed it but im shure its makin 300+whp and i rip it everyday

Re: pros and cons of boosting an h22
 

Stock H22 record is in the 420-ish whp range.

Broken ring lands is a result of poor tuning.

Re: pros and cons of boosting an h22
 

You know i am not saying it's impossible though.
Using that same forumale, assuming the BSFC of a tubo h22 is 60%, some 450 ccm injectors, if you boost the fuel pressure to 80 psi and the dutycycle to 90% it makes 350HP.
When i say I max out the 550 ccm, it's on stock fuel pressure and 80%.

Re: pros and cons of boosting an h22
 

The much-bukkake'd Full-Rice kitted B-series with boost turned up to their sweet spot are capable of .38-.42 BSFC.

Re: pros and cons of boosting an h22
 

well thanks, it lightens up a lot of thing for me !!

In that case, if a H22 with a good turbo setup is really around 0.40 BFSC and you stay within 80% duty cycle, the DSM 450 ccm injectors at 50 psi of fuel pressure are good for 370 HP !!!
Yes, that's 300 WHP easily!!

Then no wonders why my maxed out 550 ccm h22 setups pulled like crazy.... >:D