ashb82

Last night i went to the track. its a1/8th mile track my car is tuned to 15psi. On the first pass i ran a 8.0 on 6 psi. which i was happy with for 6 psi . the next pass on 10 psi was slow and all breaking up a running rich. I tried another run same thing just no power. I knew something was wrong so i looked at my datalogs my iat are way to high. my first run iat was 90f not that bad around where i tuned it at. next runs where at 150f that is no where near where when the car was tuned. so i put a bag of ice on the intake and intercooler for about a hour went out the the track ran perfect came in the pits let the car cool off went back out and broke a axle
Car runs 100% as long as my iat dont sky rocket but setting in line waiting for 50 cars to race my iat just keep climbing.
I know the reason my car ran like crap was crome was taking out 5* of timing due to the iat being so high i could change that but would that be safe
So what can i do to lower my iat when idle slow moving line at the track
i try to cut the car off as much as possible.

DRAGLS

Put it a couple inches before the throttle body.

I had a plate welded 6" pre-throttle body , made a gasket out of a
piece of bicycle tube and used some 10-24 screws with a
rubber washer. Problem solved.

ashb82

so my iat are really not 150 its just heat soak

road.head

your ecu, however, still believes your IAT's are truly that high.

DRAGLS

That's the main reason why i moved it,
to eliminate heat soak and get a more
accurate reading.

ashb82

yes understand that

It seems every time i go to the track i run in to this. never on the street and i think that is why my car starts to studer and not rev up fast due to ecu retarding timing 5 deg. i can change this value i just wander it i should.

road.head

add some timing back to that iat, make a run and pull the plugs

ashb82

thats what i will try out next time at the track