Underdrive pulley recommendation - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Pup · 05-09-2013, 04:07 AM

To those of you that have installed a UDP... What real difference have you seen.... and if one of you that trolls looking for an opportunity to scold me for not using the search function - please don't... If you have no other response - no need to respond.

I was just reading this an was interested.

Pup

Sorry guys, but sometimes that Use Search Function spanking , gets to me.

EssexPorsche · 05-09-2013, 04:27 AM

Pup.
They were first developed with the purpose/idea to simply slow down the accessories (power steering pump, alternator, AC compressor) on a car that spends a lot of time running high revs. 986/987 PS pumps are known to overheat and leak under heavy track use.

A side benefit is that the underdrive pulley reduces parasitic drag from these components and you can measure an increase in hp and torque at all rpms between 5-10 rwhp depending on the model.

Don't have one myself (yet) but only heard good things!

Pup · 05-09-2013, 08:38 AM

Thanks Essex for the info....

Pup