anyone know if i can run 88mm pistons safely with stock sleeves? h22a block? i got some pistons but need to know if i can bore the stock 87mm to 88 safely? anyone??

 

are they OEM oversized pistons or aftermarket forged? If they are forged your gonna have to sleeve the block. If they are OEM you can get a bore and hone job and put em in.

 

OEM oversized. cool. just wanted to know before i put them in! thanks!

 

I have never seen a Honda 1mm OS piston for an H22. The only thing I've seen is a 0.25mm OS H22 piston. Are the pistons you have Honda OEM? What is the PN?

 

^True. Find out exactly what you got.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 117 &raquo;</TD></TR><TR><TD CLASS="quote">I have never seen a Honda 1mm OS piston for an H22. The only thing I've seen is a 0.25mm OS H22 piston. Are the pistons you have Honda OEM? What is the PN?</TD></TR></TABLE>

Exactly, the FRM is only .5mm thick (or less). So if you you bore out further you no longer have FRM cylinder walls & what is left is not suitable as a cylinder wall material. That's why OEM OS pistons are still rather close to 87mm. Any larger than that requires sleeving.


Modified by 2lude4u at 11:20 AM 12/5/2006

 

not an exact oem, a copy, available in 87 87.5 and 88mm, stock casting not forged and pretty cheap at 200 bucks for all 4 with rings and pins. so 88 is too big to bore for stock sleeves? getting conflicting info here????

 

so how big can i go with a stock sleeve? 87.5? or just .025 over? or should i just stick with the stock 87mm bore? anyone?

 

If you don't want to sleeve it, then stay at the stock bore.

 

Your gonna need to sleeve the block to run those pistons, you cant bore out the stock sleeves that big.

 

To reiterate, the most you can bore the stock sleeves is to 87.25mm. Any more, and you will damage the fibers in the frm. If you want more, you'll need to resleeve.

 

oh well, i guess i'll just stick with the 87 bore. thanks.