Sup guys...


What parts do we need to do the underdrive pulley conversion? What company and how much does everything cost? Holla back!!!


Deac

 

Do a search under UDP. You'll get all the info you need.

 

You'll need shorter belts, which are not included. The underdrive pulley installation instructions specify which ones you'll need. I got my UDP from Unorthodox Racing. It's a jewel! The UDP and belts probably set me back $230 or so, and my mechanic charged me about $100 to put it on for me. The UDP gives me better low-end grunt, with no discernable ill effects. Good luck.

 

The UDP gives you more performance two ways - one is that it's smaller in diameter and lighter than stock so there's less flywheel effect. The other is that it drives the accessories slower so they take less power, leaving more for the drivetrain. The downside is that the accessories are a little weaker - a little less electricity from the alternator, a little less power from the ac etc.

I got this info when I did a search on UDP...everything was sounding good until I got to this post! You loose power in the electrical parts of the car??!?! Less power from the AC, Radio etc?!?!? Has anyone experienced this yet with a UDP? What benefits, downfalls have you guys encountered?


Deac

 

No downfalls yet. I run the heater, headlights, radio, and radar in the morning... haven't noticed anything getting less power yet.

Another NorCal member (CalsonicSE) has a phat system in his car and has not encountered any problems yet.

 

Cool...this soundsmore like a good mod now...what kind of power/HP increase are we talkin about w/this mod?

Deac

 

Some people say about 2 whp, while others say about 6-8 whp. I haven't seen any 5th gens with a dyno plot, so

 

Well, since we don't have dyno numbers, I guess we'll just have to believe their website claiming up to 33 extra HP.

 

Right. Sort of like getting 10 hp out of an HKS rear section.