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		986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions
No power gain from Underdrive Pulley?...

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01-19-2017, 04:16 AM	#11
Nine8Six Registered User Join Date: Sep 2013 Location: Montreal, QC. (currently expat to Shanghai) Posts: 3,249	Can't personally confirm this scientifically (quickly anyway), but yes, natural freq will certainly have different critical speed as "per design" requirements originally set by Porsche Eng. You'll introduce a whole new set(s) of vibrations to the engine (in engineering terms) Read Rotor Dynamics __________________ ______________________________ '97 Boxster base model 2.5L, Guards Red/Tan leather, with a new but old Alpine am/fm radio.

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