Yea I totally agree. I'll send you the log. It was lean up top because I was just running an exhaust dump and I think it made a pretty big difference up top. Pretty wild. It is now fatter... But I just wanted to share my experience and what had already worked for me.

 

I am running an MP122 with a 2.8 inch pulley. Makes about 13-14 psi, Total timing at WOT is 14 right now. I am spraying a lot of 50/50 Meth with a Snow kit with a #6 nozzle. The motor is a stock bottom end 5.3 with PRC heads and a cam.

The IATs are not as good as I thought they would be with the intercooler/heat exchanger - usually my IATs are about 30-50 degrees above ambient.

I compare that to the IATs on my Corvette, which makes 8 psi from an A&A blower with an air to air intercooler - the IATs are usually 10 degrees above ambient at the most - even in the summer heat here in AL.

 

where do you guys start pulling timing for IAT and how aggressive do you do it?

I'm on a SBE l92 with a tc78 turbo running about 9.5 psi. I'm still working on my timing tables for WOT. my base table is set for 18 going down to 16 at peak torque then back up to 18 through to shift. running a single big nozzle water meth kit and 10.6:1 compression.
my old 6L at 10.2:1 was running the same setup for timing but +2 on those numbers.

 

Depends what fuel youre running. My IAT table is zerod out, but i run e85.

 

93 and 40/60 meth/water with a 10gph nozzle.

 

New set up:

iron 347ci.
stock 706s with LS9 gaskets
10:1 compression
straight pump 93(no meth)
8-9psi
11.0-11.2 AFR
14* total timing

 

I dont have mine set to start to pull until about 140.

Why don't you run a richer mixture of meth? And Bluecobra, those IAT's sound way too high. My TVS hovers around 15* above ambient. You should think about running a richer mixture of meth as well... from what I have heard its better for the blower.