Another TM modded: The next level

[Dave]

Just installed my +20's and AFPR. I hooked a scanner up earlier today when I had stock fuel running 16psi. The O2 voltage was at .9v! Wow. Lean!

Decided to quit pissing around and richin' her up. I now am at 13-14psi running 50psi of base pressure and am getting .94v at the O2. It read that it started pulling back timing in the higher RPM's so I'm going to try 55psi of base and see where that gets me. Gradually start raising the boost once it quits pulling timing.

What was weird is that it retarded my timing, but I saw no knock in either 4 cylinders... My dad was driving, I was watching it. I didn't see how much timing was pulled, I'll look again tomorrow.

One last question. What happens when I open my exhaust at the downpipe vs. a full exhaust? It gets leaner while open right? Just wondering why.

-Bryan

[BadAssPerformance]

Open exhaust vs. full (stock) exhaust will typically net a couple more psi, so if you dont have fuel to go with it, it will be leaner.

[Dave]

I don't gain any boost when uncapping the exhaust or not.