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Originally Posted by GarySheehan
Well, there are a couple of aspects of thermal management you need to consider. The first has been mentioned, with simple overheating.
Another is heatsoak. Depending on where intake air is routed, the piping can absorb quite a lot of heat. So after your intake air goes through the intercooler, it can be reheated by the piping. You'll feel the car essentially fall on it's face after a few laps if you're getting heatsoak. The intake charge will be too hot, the intake air density will be lower and the compy will pull timing to reduce knock.
I can't tell you the number of times I've seen IC piping go right over the turbo before it turns into the throttlebody. This is a perfect candidate for heat soak performance loss and overheating.
Gary
Sheehan Motor Racing
www.teamSMR.com |
I've been thinking about spray-painting my Upper IC pipes with some black, high temp spray (like for bbqs or wheels) in an attempt to block off some of the heat. How would that work out?
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Originally Posted by sperry
Close... you want to keep the heat in the exhaust before the turbo because the hotter the gasses, the more they expand, the faster the turbo spools. After the turbo, you just want to get them the hell out of there... keeping the temps up doesn't doesn't help that.
So, wrapping the DP isn't really going to gain you much, except to help reduce under-hood temps. The headers and UP on the other hand are a different matter.
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You just kind of ate your own words, Scott. You want to get the exhaust out as fast as possible, right? The hotter the gas is, the faster it'll move. Thus, you'll gain a little from wrapping your dp.
Also, what about high-temp spraying the DP?