Quote:
Originally Posted by onfireX5
Some hard IAT data from the Porsche today. 73F ambient. 10 to 105mph pass. Definitely will pull a bit of boost up top. DME is programmed to start pulling at 120F IAT. With the "logging lag factor" I was probably at 110 F at 105mph with a starting 82F IAT. Easily would hit 120F before a 1/4 mile pass. Especially with a LC launch. Makes sense that I've read a bunch of different trap speeds for stock 991.2's. Will not hurt ET much at all, but it will drop mph, especially in the 1/2 mile. On a positive note, the airflow design over the IC's is killer good. Off the chart I posted it peaked at 110F and started dropping fast under coast. Score one for Porsche. When I heal up, I have a set of CSF intercoolers that should combine the great Porsche duct airflow with superior thermal drop to keep the IAT's under 120F.
On a side note, the factory gage was a bit slower than the DME by 0.50 to 1.0 psi of boost. Not bad for a quick visual. However, if you add boost over stock, the gage delta will probably increase.
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Good data and I think that thats what I feared on my boost gauge (since I was tuned/modded)-- change creates a bigger delta.