Thread: TMIC discussion
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Old 03-23-2007, 05:22 PM   #10
Scooby Specialist
Member#: 5994
Join Date: Apr 2001
Location: Fort Collins, CO
2004 Impreza WRX STi
Java Black


Originally Posted by WRX1 View Post
^^^But the heatsoak has to do with the fact it is sitting on a dyno. I can run my car up to 140mph (on a track ) and my post ic temps really only jump 8-10 degrees, while I am pumping in 310-320 pre (22psi with a fp18g). I have even tracked my car with my tdo4 at 20psi (325) and my post temps never went over 110 (ambient was about 80). Track sesions usually lasted about 12-15 min. But again, with a good seal between the scoop and ic to force the air through the ic. I think the key to a tmic is keeping the underhood temps as low as possible and keeping cool air flowing though the ic.

While there is a lot of truth in this post it does overlook one important factor I believe. That is actual air flow through the engine. Even with the 18G you can probably get away with the TMIC and those pre/post temps you are talking about. But I know with the Green sized turbos like I am running after a 1/4 mile worth of WOT the temps coming out of the stock and/or aftermarket TMIC are getting near +40-50F over ambient... even after cruising at hwy speeds to start with a cool TMIC.

I know I can dip in partial throttle and get around 10-15psi and pre temps shoot to 100-150F over ambient and post temps only go up maybe 5-10F over ambient, but that is a low air flow through the engine and intercooler situation. Once I go WOT and start flowing 280-300g/sec through the engine the TMIC QUICKLY heats up

Don't know if the author of this thread has found my old post yet about this subject but just in case:
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