Jack B
04-01-2014, 11:06 PM
When I finished insulating the intake air box and adding the hot air deflector plate, the combination showed some positive results (lowering IAT) at idle, however, I warned that the true results would not be known till I could get the car on the road in spring time. The Northern Ohio weather has not been kind, however, today was a 75 degree day. I took the car in today to get a clear bra installed and the windows tinted, therefore, the car was on the highway for about 45 minutes. The ambient air temps on the highway were 77-78 degrees F. The IAT ranged between 5-10 degrees F hotter than the actual ambient air temp when the car was on the highway. The car previously would range between 20 and 30 degrees F. I am going to get a bit more scientific in the future and take readings over different speeds and temps.
At this point, it is very apparent that the insulation and deflector plate has resulted in cooler IAT's, which means more hp when at speed. I was also able to log a few WOT runs. This info may be premature, however , the car ran a flat 12.5 A/F. These logs were taken on a different day when the road temps were only 50 degrees F and the logs were only in second gear, the road temperature made it a little difficult to keep the car planted.
Another interesting item was how the PCM controls throttle actuation, even though the pedal (Applied Pedal Position) went to the floor all at once, the actual throttle body position (Relative Throttle Position) was a controlled ramp that did not hit full open until 6000 rpm. These logs were with ESC full on, the results may vary with ESC off.
Probably the biggest benefit of the logging system is that if the PCM limits power we will know why, the other part of the equation is that currently we may not be able to do anything about it. I have a feeling that SCT or HP Tuners wll have a tool available sooner than later.
At this point, it is very apparent that the insulation and deflector plate has resulted in cooler IAT's, which means more hp when at speed. I was also able to log a few WOT runs. This info may be premature, however , the car ran a flat 12.5 A/F. These logs were taken on a different day when the road temps were only 50 degrees F and the logs were only in second gear, the road temperature made it a little difficult to keep the car planted.
Another interesting item was how the PCM controls throttle actuation, even though the pedal (Applied Pedal Position) went to the floor all at once, the actual throttle body position (Relative Throttle Position) was a controlled ramp that did not hit full open until 6000 rpm. These logs were with ESC full on, the results may vary with ESC off.
Probably the biggest benefit of the logging system is that if the PCM limits power we will know why, the other part of the equation is that currently we may not be able to do anything about it. I have a feeling that SCT or HP Tuners wll have a tool available sooner than later.