i run a t25 from a ca18det and recomend it for your 4age. i use a stock 4age, but cheated and used a 1mm metal headgasket (off my old 4agze) combined with a cheap compisite headgasket to lower my c/r as i use a 4agze ECU and electronics etc. and cannot tune it. if i had tuneable aftermarket engine management i would of left the engine 9.4:1 c/r.
i run 12psi when ever i'm in it, the t25 on mine spools @ ~2700rpm and full boost by ~4000rpm til redline. keeping the c/r higher might help spool up a little earlier, not to mention should have more torque and better fuel economy.
what engine management are you going to use?
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