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1100sport 1100sport is offline
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Join Date: Feb 2006
Posts: 515
The 3.2 is not the right "environment" to draw conclusion on the advantages of equal length design Vs non equal length design at least if you use SSI for the demonstration. This is because SSI are 35mm inside diameter primaries whereas on the Carrera 3.2l Porsche has enlarged the OEM system to 38mm inside diameter primaries. Still the SSI manage to outperform the OEM system in mid range, but are too restrictive at higher revs. If you take an equal length design with the same diameter as OEM on a 3.2 (B&B for example), you will notice an improvement everywhere, and more than 10hp increase at peak power.

On the 930, the OEM headers are still 35mm inside diameter. You will notice an improvement off boost with a "SSI like" system. But on a turbocharged engine, power comes with boost - and nothing beats short headers when building boost is what matters. Still, for a street application, a SSI like design header is very nice on a 930.

Last edited by 1100sport; 01-13-2010 at 01:37 PM..
Old 01-13-2010, 01:31 PM
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