Thread: Poor guy, hopefully can steer him in the right direction..

Jerry is the crazy man who runs the crazy bugged 3800 tuning site.

Since I know Jerry will see this: Yes, Jerry, I think you're mad.

You can't magically tune your way into running a smaller pulley on the same octane fuel. You either run a reasonable AFR and timing, or you sacrifice those parameters to run more boost (I.e. smaller pulley).

You can't just throw a pulley at a car. It has to be tested to be sure it's running well. I'm willing to bet, just the chance of how well your heads were cast plays a huge role in how well your car responds to modifications. I ported two heads, one was terribly cast, as if the two halves of the molds were both misaligned and leaking. The other head, appeared to be much better in terms of the alignment of the mods and the lack of leakage.

The fact of the matter is, most people have pulley envy. They crave a smaller pulley, just for bragging rights, and more blower whine. This results in having to run an AFR in the 10s, and less that stock timing. Neither of which are conducive to making power, nor engine longevity. Not to mention you're throwing your money away on power you're not making.

Here's a fun fact, detonation weakens your pistons over time.

This means you can detonate all of the time, and weaken the piston during the 100K miles that you don't own the car.

Then when you add a smaller pulley, do one highway pull, yes pop goes the piston.

Or perhaps you get five years out of it on the same pulley, then pop goes the piston.

Perhaps it never happens.

I know a guy on a 3.5 on a bone stock 2007 GT. He gets low 30s MPG on the highway because he keeps it under 110, and is easy on the gas. I'm willing to bet $20, that he never pops a piston while he has that car. It's more likely the trans will **** itself or the car will rot before he pops a piston.