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mark houghton mark houghton is offline
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Join Date: Jul 2008
Location: Central Washington State
Posts: 3,873
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.
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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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