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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
930's were 36mm exhaust until 3.6T when it went to 38.

The intake ports were larger on the 3.0 turbos than any after including the 3.6.

Some think Porsche made the intakes smaller for better low end power or to restrict the net power that could be made.

I suspect it had more to do with emissions. The smaller ports were needed to get a better mix of the fuel and air. The SC did the same thing and it had the domes on the pistons that helped create swirl where the turbo could not.

Want to make more power, open up the intake ports to 36mm. It will be easier for the air to get into the motor and will not hurt you low end at all.

Not worth it unless going in anyway. Many have made 400hp with stock cams, ports and the right inter-cooler, turbo and muffler.
Old 12-08-2008, 05:04 PM
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