ap2dave

Are the f20 and f22 rods and crank interchangable? If so what, if any are the major differences between the two motors (cam lift and duration, pistons, etc... besides the ECU and wiring differences) that would hinder this sort of project? I know this is kind of pointless but I thought it would be cool to destroke the 2.2 back to 2.0 for the 9k revs...despite the fact that the rest of the car is specifically designed for the 2.2. thanks.

FISH22

just swap in an F20

N2oExpresS2k

All you have to do is put my ap1 computer in your car and your go for 9k rpms! The 00-01 computer works best because it runs richest. But if you want to get serious and detroke the f22c with an f20c crank, you can get custom rods and pistons and your motor would have a better rod/stroke ratio allowing you to rev much higher than a standard f20c.

s2k dre

rods are the same, just the crank gives it more stroke, but u can rev the f22 to 8.5k all day.

jzz30

the f20 rods are longer.
f20 rod: 153mm
f22 rod: 149.65mm

N2oExpresS2k

The f20c rods are obviously longer. We're talking about destroking.. I mentioned custom pistons and rods..

jzz30

^i was commenting to dr. dre up there
and your theory is right. they do that with the itr motors where they use ctr rods wich are 4.9mm longer than itr.

N2oExpresS2k

Well ctr motor.. They use the itr block with b16 crank.. I really want to put one together. I wonder if it would be worth the mission of tracking down an f22 block and getting custom rods made.. The rod would probably only be about two or three mm's longer depending on wrist pin height.

jzz30

^ if you use an itr block with a b16 crank you'll get a super low comp engine.
f22 and f20 blocks are the same and the rod lengths have a difference of 3.35mm. i was calculating rod ratio last night and i figured out that if you want to make the rod ratio back to the f20's then you would have to lengthen the f22 rods over 15mm!!! using using f20 rods in an f22 hardly makes a difference in the ratio (a difference in the hundreths.)