So I've been thinking about this a little more, since there's a possibility of me buying a 4th car which would have a 1st gen 4A-FE. I have a lot of extra parts accumulated over the past several years since I bought my first Toyota (my CAT wagon). One of my acquisitions is an MR2's disassembled 4A-GZE minus the supercharger bits.
So I have the 8.0 GZE pistons, though in standard bore size. I'm wondering,
if they were usable under a 1st gen 4A-FE head and its re-honed (not over-bored) block, what kind of compression would I see? I checked out a compression calculator and got these numbers. Correct me if I'm wrong.
My reason for this would be to make an FE that's closer to stock comp (in the 9's) with the plan of turboing it. ARP hardware, ported head, rebuilt bottom end (but using the stock FE rods & crank). I know it sounds trivial to bother rebuilding and turboing a 4A-FE over a 4A-GE, but I have several reasons. One, to make a "crappy" engine more bulletproof, two, to keep all stock accessories (as the FWD GT-S is not exactly common in my area), three, because I'd end up with two 1st-gen 4A-FEs sitting in my garage and I don't want that
06.mm head gasket (I can't remember why I used this number -- OEM 7A-FE head gasket?)
0.8mm head gasket (TRD 4A-GE -- would this work?)
1.2mm head gasket (standard thickness)
I wasn't sure about the HG cylinder bore size, so I entered 82mm. It made little difference in compression when changing it, though.
