SIMPLE question: what is your intake air temp?
I've gone so far as to after making a spirited run get out of the car and use a temp gun to measure the inlet and outlet of the intercooler and with ambient temps of 88 degrees, I saw 120 degrees on the inlet side of the intercooler and 91 degrees on the outlet.
My IAT during that blast went from 88 to 94 degrees, so I'd say it's pretty accurate. Not exact, but pretty accurate.
My IAT during that blast went from 88 to 94 degrees, so I'd say it's pretty accurate. Not exact, but pretty accurate.
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I think my IAT sensor is extremely lazy. Here I thought my FMIC was really efficient, but after adding the water/meoh injection, I see that the IAT sensor reacts equally as slow dropping the temps as well.
So what sensor are people running that reacts quicker??
So what sensor are people running that reacts quicker??
I use the Oriley auto equivalent to the "Wells" brand sensor part #SU127 or "GM" part #25036751 because it could be threaded into the aluminum tubing on my Vortec kit. The sensor is threaded into the last part of the kit that attaches to the TB. I loged a run with a predator tuner and it started at 91deg and ended up at 104deg on a run from 50-125. It has been verified by a lazer pointer thermometer thingy and is very accurate IMHO. In my car with 3.23 rear this was upper 2nd and all of 3rd gear roll racing a friends 2010 camaro. I dont have meth or anything aside fron the air/water intercooler from Vortec...
EDIT: I see in the following post you mention a lazy sensor. I'd have to agree.
I see about 10-15* over ambient cruising and during a pull it usually starts around 20-30* over ambient (after burn out and staging), the drops about 10* for a couple seconds and then starts climbing to about 60* over ambient by the time I let off. I have a monster A2A 24X12X6 core.
this is what i see, i'll start a run at 100* and when the meth hits it almost instantly drops to ~70* and creeps to ~75-80 at the end of the pass.
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It would be intresting to see how much ambient air is actually passing through the IC's used. I know a guy with a Noble M12 did this and he got drasticly below road speed numbers( as in less than 50%) and that was with a fully sealed IC box and the air discharged into a low presure area behind the car (mid engined). I would guess the some decent shrouding could really help in keeping takes temps cold!
Chris.
Chris.
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That is right about the sensors reading slow, and your ECU may only be updating them so fast as well, don't think the factory stuff is meant to log that quick. At 17 PSI at the end of a 1/4 mile, I"m at about 270 out of the turbo, and with a modest W/M flow, down about 100F at the back of the intake (170 F) (no intercooler). If you look at the slope of the rise of the temp, you might be able to see if the reading is accurate, or limited by the sensor/ECU reading.
The guys I know that ran heads up classes that didn't allow any intercooler said they were above 300F.
The guys I know that ran heads up classes that didn't allow any intercooler said they were above 300F.
A2W. Haven't logged any boost pulls yet. Never realized there was a "delay" in the GM thread-in IAT. Interesting. For the record, I'm using the factory IAT sensor that came with the 2000 F-bodies, not sure if it's the same as the other years, but it's the press in one with the rubber grommit.
