Quote:
Originally Posted by _ace_
The boost pressure is also a big deal. Tracking while boosting +5-7 psi is different from +16 psi. And superchargers seem to add less heat than a turbo or TT system at the same peak boost/hp level.
One way to make this work is to just get two tunes on a TT system: a very low boost tune (like 3-5psi, almost off) for extended track use and a higher boost tune for street/drag/auto-x/a single fast lap where heat buildup isn't as much of an issue.
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Gonna correct you on a couple of things. No one is tracking at 16psi. In fact, no one has reached 16 psi on a stock motor. For turbos, you can turn down your boost controller, but you can never go below the wastegate spring pressure, which is 5-6 psi.
For superchargers, you're stuck. Whatever pulley you have in there will determine the boost pressure. You cannot change boost levels easily.
And I'm pretty sure given the same horsepower and boost level, a supercharged car will generate more heat. In a supercharged car, a significant portion of horsepower (and hence heat) is wasted on spinning the supercharger. Whereas a turbo uses mostly exhaust waste to spin. This is the same reason the superchargers use a 650cc injector to make similar or less horsepower than a turboed car, which is using a 600cc injector.