i was thinking of building an f22a i was wondering
if anyone know of a factory honda piston that would bump compression
on that motor like another f series piston
anything would be great

 

IIRC, F22 pistons are all 8.8 CR with a 30.5mm compression height. Is there a particular reason why you need to keep it cast OEM? There are after market forged pistons that would be easier to use.

Any higher compression OEM cast piston will require machine work on your block.

1. The H22/H23 pistons will require an 87mm cylinder bore. It would also require ether the use of a thicker head gasket or machine the head to match the 31mm compression height of the H pistons.

2. The K20/24 piston would also require an 87mm bore but it uses the same 30.5mm compression height that the Fs use so you would not require any head machining. There is also a trick to putting these in IIRC you need to reverse them, or so I have read!!!

In order to fit ether of these 78mm pistons in your F22A it would be best if you sleeved it and then bore it out. Because according to Honda specs the max bore for the F22 is 86mm.

So in short if you don't want to take your block in to have it machined there are no OEM Honda pistons that will increase your compression ratio that I know of.

As mentioned above, your best bet is to spend some money and buy a set of aftermarket high compression forged pistons.

 

if not keep the stock internals and rebuild the head then boost it.
i have a f22a6 boosted with 16g and runs like a champ. my 2 cents