View Full Version : 7A- engine block help/advice

07-25-2009, 08:06 PM
Hello, I am currently working on a 96 7a-fe that is nearing compleation and what I really need is some advice. My question is I plan on doing a 4a, 20 valve silver top swap but I do not have the figures to the head and Im trying to figure the end bhp and compression ratio. so how do I figure it out if Im using the 7a- bottom end w/ a 4a-20v? Also I have one more question, what is the biggest I can bore the block, as I have already have bought .040 over pistons but will there be too much stress on the block? if so can I acquire a set of piston sleves? any advice will be greately appreciated.