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Cobalt Cobalt is offline
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Join Date: May 2004
Location: New Jersey
Posts: 1,380
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I agree the 964 turbo can easily handle 1 bar so long as the car is properly tuned. The IC and WG are adequate to cool and flow the proper amount of air. So long as the diaphragm in the WG is Ok why spend the extra on a tial.

the 91 turbo came with .81 bar from the factory actual tolerance varies from car to car. The OBC will only show .7 bar no matter what spring you have.

I found the best muffler for sound weight and performance is the least likely you would expect. I have a 3" in out magnaflow that has almost 0 restriction and weighs 6 pounds saving a ton over that and muffler and sounds great. These mufflers only cost about $290 or so plus fabrication and aree as goods as any expensive muffler on the market.

I don't have a part number but you should be able to find it easily.

BTW figure without any changes except for the 1 bar spring an increase between 18 and 22Bhp. If you want to reduce lag do the cat bypass it is the best bang for the buck and I would also check you BOV they have a tendency to fail and might as well spend $100 to replace it with a billet version.
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Anthony PCA affiliate '77 member '83 '90 3.8 RS tribute, '93 964 C2, '93 928 GTS 5 speed, '94 Turbo 3.6, M '15 Boxster GTS18 Macan GTS
Gone worth mentioning '71 E '79 SC, '79 built to '74 3.0 RS tribute (2390 # 270 hp), '80 928 euro 5 speed, '74 2.0l 914, '89 944 S2,'04 Cayenne TT '14 boxster, '14 Cayenne GTS many others

Last edited by Cobalt; 02-27-2009 at 05:08 AM..
Old 02-26-2009, 07:57 AM
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