[cjperformance]

Im close to having things "dialed in" on my now year long effort to learn and tune without a shop and/or dyno. All due credit to this board as my primary source of info for where i am now though. Anyway, the last few weeks after getting the dragy, I have been able to get better and better performance, now that i have a non-seat-of-pants measuring tool.

The other day i noticed my IAT and MAT were very high after a long pull. The ambient was 90 deg F. IAT started around 120 F and I did a long 3rd through end of 4th gear pull. IAT rose during the run up through 135, 145, 155... engine started pulling timing at 140-150 degrees due to the IAT vs timing tables... was down 2 degrees of timing at the top of 4th gear.

After i let off the IAT still continued to rise for about 1 second to about 170 before starting to cool back down.

I get that less timing is needed at higher temps, and to protect the motor. And higher temps are the result of shift rpm increase and subsequent boost pressure increase. Im just wondering what others have seen. Im wondering if i just shouldnt push things on hot days, or maybe i just shouldnt worry about it and let the computer do its job of backing down timing.

There was no knock and according to dragy, there was no performance loss compared to a cooler day's run (with a slightly different tune) so backing down the timing according to IATs seems to be a working strategy.

I double checked that the intercooler wasnt obstructed or anything like that. I honestly just havent driven it in weather this hot before at my current tune/performance level. Everything else as far as the log was spot on. Incredible MAF lbs/min for the heat, great cyl airmass, EQR was absolutely spot on at .82 with 53% eth. Boost was peaking at 8.75 lbs.

I feel really good about the tune right now, just a bit concerned what IATs would do if i had an even longer pull. The intercooler is fairly obstructed by the front license plate (required in my area), and the front crash bar. Theres not really a whole lot i can think of to do to make that better. The pc intake is the rear facing one that sucks in from next to the engine. IATs started in the 120s... 30 deg above ambient already... Any thoughts?