1989 4DOOR COROLLA
how can i make my old tired 4ac get up and go and look good for little money
which would still be cheaper than to do all that crap to a 4ac, and for what gains? hardly anything probubly maybe 20-30hp if that, camshaft alone is about 4bills, with bigger carbs, port and polish and all that bottom end work to put in higher comp pistons you coulda already swapped in a running 4ag.You can do the things you can do to most anything: bigger carbs, camshaft/springs, freer flowing exhaust, maybe port/polish, higher compression, run race fuel, maybe advance the timing a little. I have done a lot of research on them. It's not worth putting money into the 4ac unless you're dead set on keeping that motor in it. If you wanted to, you could swap a 4ag head onto it and go dohc. But that is nearing the price of a complete 4ag motor.
the only difference is that 4afe is fuel injected with gives you a whole other tuning perspective, also its 16valve, when peope ask what it would take to swap a 4afe i tell not to bother and get a 4age, im not a huge fan of the 4afe myself when the 4age is a way better engineI think it could be built to compete with the f engines which arnt very strong either but i dont hear is much crap talked about them.
Don't get me wrong, I still love the 4AC, it was the first engine I took apart and put back together all by myself when I was 16 but its only useful as a economy car engine, which is what Toyota designed it to be. The beautiful thing about the 4AC is the reliability with the low power output and simplicity of the engine itself.finally someone who actually did something to their 4ac to attest to the fact that its a waste of time