what is the max bore one can do to a h22 before sleeving without worrying? i'm deciding to run serious boost over 25+psi with sleeves. just concerned about getting in the worst case scenrio if there was a mistake while boring, will i have room to redo. please help me out.

 

when you sleeve i would go with stock bore simply because... if u **** ur **** up you can bore it out and get bigger pistons... if you bore it like 90 mm then when it ***** up your block is trashed

 

i know that but i have no intention to max it out the bore because i wanna know how far one can go. just wanted to know the limit.

 

with golden sleeve i've been told that you can go to 89mm for boosted engine with no problem, so that's what i'll do, and that may be the max you want to go!

 

91mm max bore NA cars only
89mm max bore FI, with headgasket problems

keep it under 88mm, you can make more power elsewhere

EDIT: only go .5mm above stock (87mm) if you want a rebore out of it, you could probably go higher, but whats the point? Half a mm is how big?? 15 thousandths?

 

dlb is runnin 90 or 91mm with turbo... curious to see how it holds up.. i would go with 87-88 or so

 

am running 90mm with a copper headgasket with SS o-rings in the head

 

thanks for the replies guys. any other comments is appreciated.

 

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Can't you just replace the sleeves?

 

i believe you can... but the block isnt the expensive part... its the sleeves

 

so would there be a noticable difference while boosting (spool time) between 87mm vs. 89mm using a t4 turbo? what's the displacement of a h22 going to 89mm?

 

not much... what are the specs on the turbo

 

thinking about the big boy pt67 gtq. .70 a/r compressor housing and a .68 rear.

 

hello lag, my name is too big for the street, .70a/r, yikes

 

yea i know there's gonna be lag, i have no intention to race on the streets. my thoughts were to prove h22 have a part in the turbo community in making hp.