7A block/bottom end. Relative vs abolute strength. Options

[Jehuty]

I'm interested in the 7AGE setup, and there is some good info out there, but it's vague in some spots...

Specifically, about strength of the block and bottom end of the 7AFE. Most refferences to the strength of these parts is stated relative to the 4AGE. For example, the fact that the 7A block has less ribs than the 4A, or that the flywheel bolts up with less studs. Yeah, great. It's not as good as the 4A, but what does that mean? I want to know what the actual rev and boost limits are.

Reason is that altho the (7A) block, crank, rods and pistons are all stated as being weaker than the 4A counterparts, the only parts that looks really "weak" (in absolute terms) to me are the pistons. The rest looks like a pretty stout little engine. Am I correct?

So if anyone knows where I can find some info about the rev and boost limits of the 7A (or the 4A for that matter!) please help me out! First hand experience from anyone who's blown a few would be nice too. Heck, I'd even appreciate a little heresay. ;)

[frotou]

Yeah , the weak point of the 7a is the rods. Kwanza is right , don't rev over 7500 and something around 12-15 lbd of boost , for safety shot peened oem or get pauter (this is my negligence on my engine). It was my mistake to try my hybrid run with the afm ecu but never I was told that this ecu wasn't compatible with any piggyback. I'll do a lot better this year.

Claude