Under Pulley

[Topless]

Originally Posted by chaudanova

The UDP doesn't require removal of the AC does it? Perhaps I am mistaken, but I read some other posts in the past about people that removed their AC also, and wasn't sure if that was a requirement for running the UDP... Please clarify...

Nope. You simply replace the main drive pulley with a smaller one to slow down all the accessories. The guys removing the A/C pump are removing weight and setting up a race car. My car is still a street car and I like my A/C.

[chaudanova]

Originally Posted by Topless

Nope. You simply replace the main drive pulley with a smaller one to slow down all the accessories. The guys removing the A/C pump are removing weight and setting up a race car. My car is still a street car and I like my A/C.

Awesome, thanks for the info! Seriously considering getting the UDP...

[Bob O]

I got my under pulley from Brad Roberts last week and started to put it on. Should be a 2 on a scale of 1 - 10..right? BR's package comes with the wrench needed to hold the new pulley while you tighten it to the correct torque. The problem is......there's no similar tool (or rather I don't HAVE a similar tool) to hold the OLD pulley while you loosen it. And the holes in the old pulley vs the new pulley are not even close to being the same spacing. So unless I totally wreck the old one with some vise grips or some such makeshift arrangement that's either going to ruin the pulley or worse, I can't get off the nut from the old pulley. Porsche supposedly sells such a tool (special tool #9593) but the dealer gave me the shoulder shrug when I asked about it, Pelican doesn't carry it, Suncoast doesn't carry it, I can't find it anywhere and don't have the equipment necessary to make it from scratch. Any ideas??? You guys who have already done this job, what did you use to hold the old pulley while you loosened the nut?

Thanks

Bob

[Topless]

Brad lives in my town so he put mine on for me. Ask him what he used. Others have measured the hole spacing and just built a simple tool running two bolts through a piece of steel to hold the pulley.

[Sammy]

I put my car in 6th gear and had no problem removing/installing my pulley without the "special" wrench.

[23109VC]

where do I get the U/D pulley and how much does it cost??? sounds like a GREAT mod. it's not gonna make big power, but it will make something I can feel and it's not a $1000+

I'm in!

[Bob O]

This is what I got.

http://www.bradrobertsag.com/c=INAqeVpHZVT1bZMY0P4u1hPWa/product/POWERPULLEY/UnderdrivePower_Pulley.html

Bob