Is the intake temp measured at the MAF, or is it measured somewhere else? The reason i am asking is I was dynoing my car yesterday and the ambient temp in the dyno room was 100* according to the dyno. My intake temps were showing between 120*-130* on evoscan. I hade a huge 220v fan blowing on the front of the car too.

 

Maf

 

Thanks. The car had absolutely no power yesterday with the high *** temps. I only made 320 whp on 91oct, I guess thats not too bad considering the temps.

 

ya its a really good idea to put a thermocouple on the outlet of your intercooler or somewhere along the inlet flow path to see what temp your really at. Good way to know for sure your limits.

 

You need some of this action - cold air box.
https://www.evolutionm.net/forums/sh...d.php?t=337233




I'm working on the prototype right now, and doing a lot of testing. On the dyno it's hard to get good airflow, even with big fans. It takes REALLY big fans to simulate real driving conditions.

 

Keep in mind that with higher intake temps, that intake temp compensation comes into play and can richen up the mixture. If you are tuning during this, this is good to know as you might be leaning out the mixture to compensate. However as soon as your intake temps go down, like when the car comes off the dyno and runs on the street, your fuel map might be running the car leaner. I would advise checking your AFR's on the street now.

I've done this at the track on a hot day. Intake temps richened up the mixture 1 full point., 11.3 to 10.3. I leaned it out to compensate. Then on the drive home on the freeway the car ran 12.4 afr with the cooler intake temps of the evening.

The Evo X has intake temp sensors on the MAF *and* on the intake manifold so this should help a bit more to tune using actual charge temps after the intercooler.

 

When i got it back on the road it was actually showing similar temps and it richened up a bit as expected. I will try it again in a few days if the weather cools down.

 

Dyno on a hot day and drive in the summer. Dyno on a cold day and drive in the winter. . . OR ALT Map switching! LOL Gotta love it!

BTW Binary, nice work on the cold air box!

Josh