2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Question about wastegate dump

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Old Nov 7, 2004 | 01:43 AM
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Hi_Im_Rob's Avatar
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Question about wastegate dump

Right now I'm routing my HKS GT Wastegate through a 2.5" dumptube but its really loud. If I was to route it through my RB 3" Turboback how much WHP would I lose?
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Old Nov 7, 2004 | 01:45 AM
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Also, it wouldnt effect spool any would it?

I'm currently running a T66 sized turbo at around 15psi, soon will be doing around 22-23psi.
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Old Nov 7, 2004 | 04:20 AM
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Originally Posted by Hi_Im_Rob
Right now I'm routing my HKS GT Wastegate through a 2.5" dumptube but its really loud. If I was to route it through my RB 3" Turboback how much WHP would I lose?
Loss would be minimal...in fact, if you do it "right", there's a chance you could pick up power...


-Ted
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Old Nov 7, 2004 | 08:10 AM
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Ted, how do you have yours setup?

In theory wouldn't the exhaust bypassing the turbo help scavenge exhaust on spoolup? (If this makes any sense)
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Old Nov 8, 2004 | 12:43 AM
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I still run the stock turbo.
All the external WG FC's I've tuned all run dump tubes.
They are loud!


-Ted
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