It's no fun giving it all away in the thread title, but hell, it does make for a good thread title.

Kris (Black Venom) and I decided that we should go out and get his car going on a good baseline tune, seeing as how he's selling it and I'm sure whoever buys it will want to be able to go WOT. He'd just been babying it around at part throttle since we installed the turbo.

Anyway, he got it out on our test circuit (multimillion dollar facility that has a strange resemblance to a series of I-75 on ramps ) and did a series of 3rd gear pulls. It was still on the factory maps, running pig rich 9.3:1 AFRs and breaking up above 6 grand from the sheer amount of fuel.

That was no good, so I leaned it out on the higher load maps where the car spends all of its time in boost, raising it to an amazingly lean 10.1:1 AFR . Hey, all I'm doing is plugging numbers into the stock ecu here, no wideband to confirm it, so I play it pretty damn safe. I did a bit of fooling with the timing map too- smoothed and lowered the last few rows ending up with a peak of 19 degrees timing and the torque peak at 16-17 degrees timing, all on the highest load level of course.

We went for another set of test runs and it was running beautifully at 21 psi with zero knock across the board. We probably could have gone up to 22-23 psi if it weren't for the fact that the 450's were peaking at about 95% injector duty cycle.

I will admit that he has a non-turbo FPR in his car. Raises the fuel pressure to 48 psi, makes 450's act like 510's, raises the base pressure high enough to avoid the trouble people usually have with fuel pressure overrun on big pumps. My favorite junkyard mod.