Quote:
Originally Posted by R33E8
I heard the main problem with the variable geometry turbo's is that they can't take the heat... I "think" the only gas powered car running one is the 997 Porsche Turbo..
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Gas engines are a little warmer that diesels as WOT, but not too much.
Diesel guys try to keep it under 1400*F while gas guys seem happy under 1500*F.
Some of the Cummins trucks actually had problems at first with carbon build up on the vanes because the turbo wasn't getting hot enough. It caused the mechanism to stick.
I'm tempted to try one and rig up some method to control it, but those VGT housings are pretty large.
Until then, a divided manifold or a reasonable AR are probably better methods.