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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
Speaking only of well designed short and equal length system for a 930:


An equal length is 'probably' going to make another 20-30hp in the mid to high range than a shorty.

A shorty is 'probably' going to come on boost about 100 to 300 or so rpm faster than an equal length.

Both will probably come in faster and make more Hp than a stock late 930 HE/header system.

The factory stock late 930 headers are probably less prone to failure and have the best ability to deliver heat.

There are extreme Porsche Turbo builders that are using shorty's and equal length headers to make up into the 700fwhp and higher range.

There are 930 turbo motors running stock late 930 headers making over 500fwhp. (Monster CIS claims over 600hp on stock headers.)

Then there is proper sizing of the primary tubes that can reduce lag or support higher HP or turn a well designed system in to a poor performing if not matched to the motor.


There is no perfect system for all situations and builds.

If we are lucky we have good information to base decisions on and different systems from which to make choices.
Old 01-13-2010, 09:23 AM
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