Originally Posted by egsir

im talking about the euro f22.. its vtec

Originally Posted by 92gsrteg

my question is can you use h22 internals (rods pistons)on a f23 block with a f23 vtec head? and can you use h22 rods on a f23 crank??

Originally Posted by cr1m3rat3z

Yes and no. H22 internals "can" go in but there are things you gotta consider. First off, you'll definitely need to bore that F23 out to 87mm in order to make the h22 pistons fit. Secondly, the f23 has a 97mm crank, meaning the longer h22 rods will push the pistons out of hole (by a whole lot). Easy way to remedy that is take the crank of a h22a4 ('99 and up preludes only) and drop it in the f23 block. You can't use pre-'99 cranks because of the differences in size of the mains (h22a4's of '99 and later share the f23's 55mm mains). Essentially, you're destroking your motor into an h22 but with a little higher compression. Never seen it done so I don't know how that would turn out as far as putting power down. If I had the parts already lined up, then I would go with higher compression pistons(Type-S maybe or better). Or, I wouldn't overbore the block (keep the f23 pistons for low compression) and just boost the living sh** outta a rev happy motor that has OEM iron sleeves! I have seen the build the other way around (H22a4 with f23a1 crank and rods w/h22 pistons) and it produced one monster ass build. Good luck.

Originally Posted by Enigma

What vehicle is this going in?



What are the deck heights of these blocks (f22/f23/H22)?

Or is there an archive of engine specifications that you know of?

Originally Posted by cr1m3rat3z

Deck height is 219.5mm for all f22/f23/h22/h23 motors. That's 8.64 inches. There is an archive on Honda Tech I believe and I'll post the link as soon as I find it again because I'm dishing these numbers outta memory and I could be off. But, I have put a number of these hybrids together so I should be in the ball park range.