ok i have done a search and i'v found that the maximum you can bore the h22 out to is 90mm and most people said that 89mm would probably be the best for reliability and performance.

i wanted to bore it out to maybe 2.3 or 2.4 so i am wondering how much would needed to be bored to get to 2.3 or 2.4? all the threads i saw show the bore size in mm but how about the displacement? there's probably some math formula to get the displacement from the MM but i don't know the formula so please help.

also what else is involved in boring it out? anything needed to be done to the head?
and if i was thinking about just boring to 2.3L because then i would probably be able to just use the h23 head gasket? but i'm not completly sure

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AznBlueBoy &raquo;</TD></TR><TR><TD CLASS="quote">ok i have done a search and i'v found that the maximum you can bore the h22 out to is 90mm </TD></TR></TABLE>

You know you're gonna hafta re-sleeve to get the displacement you want, right?

 

Yes there is a formula, if you search hard you can find it, I can't think of it 100% off the top of my head. I do know that if you use 89mm pistons with h22 crank (90.7mm stroke) you will be in the 2.3 area. 89mm pistons with a 95mm stroke i.e. h23 crank you'll be around 2.45........this is all off the top of my head.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tomakit &raquo;</TD></TR><TR><TD CLASS="quote">You know you're gonna hafta re-sleeve to get the displacement you want, right?</TD></TR></TABLE>

yeah, you cant just "bore the h22 sleeves out." doesnt work like that. you need to have the block resleeved because the stock sleeves have an frm material that will not allow aftermarket forged pistons anyway let alone allow for boring. as for calculating displacement, do a search. there are probably 100+ threads all on this subject: boring, frm, aftermarket sleeves pistons rods cranks etc.

 

i already knew that i would need to resleeve the block
but basically the only thing that needs to be done is resleeve it, bore it out, and i can use the h22 crank with no problems right? or if i use the h23 crank with the longer stroke, would that limit my ability to rev high as the h22?

 

Resleeve, bore to 89mm, use H22 crank = ~2.3L

That way if you fudge things up you can always go up to 90mm

 

thx tomakit
are you 100% sure about that though?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AznBlueBoy &raquo;</TD></TR><TR><TD CLASS="quote">thx tomakit
are you 100% sure about that though?</TD></TR></TABLE>

Nope, never done the math. Just going off of what he said.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rad Racing &raquo;</TD></TR><TR><TD CLASS="quote">Yes there is a formula, if you search hard you can find it, I can't think of it 100% off the top of my head. I do know that if you use 89mm pistons with h22 crank (90.7mm stroke) you will be in the 2.3 area. 89mm pistons with a 95mm stroke i.e. h23 crank you'll be around 2.45........this is all off the top of my head.</TD></TR></TABLE>

 

It is a complicated formula, but this should help people get started:

http://en.wikipedia.org/wiki/Geometry

Specifically:

http://en.wikipedia.org/wiki/C...ry%29