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mark houghton mark houghton is offline
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Join Date: Jul 2008
Location: Central Washington State
Posts: 3,899
When I took mine out of the equation (well, it's still there but instead of recirculating the boosted air, it just vents it) what I have found is that the rpms drop instantly when shifting vs. hanging up there...which is why I did the mod if the first place. Yes, it will draw air into the mainfold in an overrun condition (off the throttle, vacuum opens the valve). No problem, I simply installed a small air filter on the end. Now, when fully off the throttle, I see my AFR's leaning out as would be expected.
Will this mod make your 930 a ricer and gain all sorts of performance? Not....Just vents a little more boost pressure between shifts and minimizes the 930 "cackle" when decellerating off throttle. That's been my experience anyway.
Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 08-21-2011, 12:12 PM
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