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GT2EvoGuy GT2EvoGuy is offline
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Join Date: Jun 2008
Location: Connecticut
Posts: 121
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Throttle body sizing?

Just wondering what people's experiences have been with throttle body sizing on 930 motors? My 3.4L EFI motor has an OEM size 69mm 1995 993 TB and plastic intake manifold and Im wondering if this will be adequate to support my future target of 700whp? I noticed that some peoples cars have larger TBs, so for my dyno tuning this month I ordered a FVD 71mm overbored 993 TB just to see if that will make any difference. My motor currently puts down 600whp thru the 69mm 993 TB but Im thinking it may be a slight restriction at high revs? So much air passing thru there when you have a big turbo.

I see that a company called IPD makes big bore TBs and plenums for the 996 turbos and claims a 30hp increase in top end HP with the 75mm TB/plenum combo. What works for the turbo 996s might also work for my 930 motor?
Old 08-01-2008, 04:45 PM
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