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husker boxster · 05-12-2021, 01:31 AM

I have the 82mm GT3 TB and IPD plenum on my CSS. I did not do a tune (not a believer in them), so I did not feel a lot of gain. There seemed to be a bit more grunt in the 2K rpm range, but that was with the butt dyno and I might have been looking for justification for the $750 outlay.

I got to thinking (a dangerous thing for sure) that maybe that combo contributed to my bore scoring by was pushing more fuel into my cyls than the factory setup. But I was told by the engine builder it had nothing to do with that or anything I'd done. It was just a poor design by Porsche. YMMV.

05-12-2021, 01:31 AM	#2
husker boxster Registered User Join Date: Sep 2006 Location: Omaha Posts: 2,911	I have the 82mm GT3 TB and IPD plenum on my CSS. I did not do a tune (not a believer in them), so I did not feel a lot of gain. There seemed to be a bit more grunt in the 2K rpm range, but that was with the butt dyno and I might have been looking for justification for the $750 outlay. I got to thinking (a dangerous thing for sure) that maybe that combo contributed to my bore scoring by was pushing more fuel into my cyls than the factory setup. But I was told by the engine builder it had nothing to do with that or anything I'd done. It was just a poor design by Porsche. YMMV. __________________ GPRPCA Chief Driving Instructor 2008 Boxster S Limited Edition #005 2008 Cayman S Sport - Signal Green 1989 928 S4 5 spd - black