I've been trying to find info on them for the 05 and can't find any. Even at March's website. I'm considering getting a set at a good price, and just need some info on them (private sale). Specs, ect..... Also if some one has a set give me some input on how ya like them or don't compaired to others. I'm still looking! Thanks.

 

Here's another co, that makes UDPs,

http://www.lmperformance.com/5924/73.html

But I would go with steeda, so far, they are the best one's made....

 

Performance Center is selling the steeda one's for $190!

Go For it!

http://www.performancecenter.com/products/...hicle+Specific/

 

Performance center are good people to deel with i just ordered some camber adjusters from them

 

I still can't find any info on the March underdrive pullies for the 05+.... I can get a set of those used for less than $125. I might go with the Steeda's, I'll have to see.

 

does steeda have a predator tune for their UDPs? The predator manual says specifically in bold print not to use UDPs with the canned tunes that come with the unit. Bummer.

 

I too was waiting for March to put thiers out. Still haven't found any info......

 

I've got Steeda's and a Predator tune, haven't had a problem. But my predator tune is also for the C&L Intake and MAF housing, not just a canned Predator tune. Not sure why the pullies would have an affect on the tune though. The alt is still putting out more than enough juice, and the water pump still flows just fine. Nothing else that I can think of that udp's would be having any kind of bad affect on.

 

Page 4 of the manual states:

DiabloSport Performance - For stock to mildly modified applications - NOT FOR USE WITH SMALLER UPPER AND/
OR LARGER DIAMETER LOWER PULLEY APPLICATIONS

 

Manual? Who reads the manual?

Well, that's alright then, since with UDP pulley's the upper pulley (water and or alternator) gets larger and the lower (crankshaft) get's smaller. Whew, dodged a bullet there!

Here's a pic of my stock vs Steeda pullies side by side for comparison.
Stock pulley's are on the right (blue dot on the waterppump pulley).

 

I wish you didn't tell me that because now I have to go buy pullies now in the spring.

I think pullies, LCAs, 4.10s, Flowmasters and M/Ts will have me ready for the track this year.

 

Do we need a tune by adding UDP? Just curious cuz my car will arrive in about 2 weeks, already have the Mac's and h-pipe from brenspeed and was thinking about picking up a set. Wanted to get to the track before the xcal2 and c&l went in to get a comparison, but if i need the tune before the UDP, i guess i will have too.

 

No Tune Required!