SR20 to cefiro

[KKaplumbaa]

15 minutes ago, GTSBoy said:

I don't know if the blocks are "the same". They will be very very similar. Obviously, either the bore or the stroke is going to be bigger on the 20. If the bore is bigger, then the 18 head is unlikely to fit properly. If the bore is the same, then you can almost certainly fit the CA18 head, but there migth be a few fun things you have to do to make water galleries (or other things) line up properly. Or... it could just be real easy.

Is it worth the effort? Almost certainly not. You can make nearly as much power on a 2 valv ehead as you can on a 4 valve. There's not any "magic" in a 4 valve head.

Yeah, you are right. It seems easier and more reasonable to boost the engine.

And as you said the blocks are very similar but the cylinder bores are different.