IAT and timing

[Pat]

I'm sure someone knows at what IAT timing is pulled on our engines. Would you please post up?

[JoeBoomz]

It's a LOT. I'm traveling for the weekend but if nobody posts here by Wednesday when I get home I will post up stock vs my tuned tables here.

[justbob]

Most tuners have it pulled at 150 Pat. IIRC stock is like 110?


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[Pat]

Thanks, the reason I asked is that an 09 CTS-V with supercharger and 14 lbs of boost was at the local strip Friday and the driver was putting ice water in his S/C heat exchanger reservoir. In our discussion he said his IAT's were in the several hundred degree area and timing was being pulled by his computers program. That got me to thinking about my IAT's. I don't have an inter-cooler or heat exchanger and I'm running just 10 lbs of boost @ 6K RPM. I do have a 50 shot nitrous that can cool down the intake air charge. Just interested, racing is not on my everyday to do list but it is on my bucket list.

[sailsmen]

Then he was running a Turbocharger. Every tuner has told me 150* is it.

[JohnE]

Take a look at the Air Charge Temperature tables if you want to know what the PCM is doing with the IAT temperature sensor. The easiest thing to do is plug in new numbers for ACT on the top left of the first tab.

*make sure to download, unzip and add the attached XLXtrFun.xll file to excel on your machine in order to see the results.




John



FYI: I posted the stock n/a tune settings. Forced induction requires different settings.

[Zack]

Then he was running a Turbocharger. Every tuner has told me 150* is it.

What leads you to believe its a turbo?
A Centri will put out 200+ temps without intercooler

[sailsmen]

"........he said his IAT's were in the several hundred degree area ...:.

"sev·er·al adjective \ˈsev-rəl, ˈse-və-\
: more than two but not very many"

[Zack]

"........he said his IAT's were in the several hundred degree area ...:.

"sev·er·al adjective \ˈsev-rəl, ˈse-və-\
: more than two but not very many"

Still missing your point.

Statistically the CTS-V will have a roots.

[Pat]

Guys;
Clarification: The CTS-V did have a stock roots supercharger and a computer chip that allowed more boost. I thought I heard the driver say several hundred degrees of IAT, however my son Jason, the Honda Mech, was with me, and he understood the driver to say his IAT's were about 180 degrees and that he was putting ice water in the heat exchanger between runs. The only other mod to the CTS-V was a larger intake pipe.

It's a drag strip and there was a lot of noise. The CTS-V ran in the very low 12's.

Regards,