I'm thinking about getting some udp's and I'm curious as to what ones peopple have and like? I'm thinking about the single march balancer, the Steeda pulleys or the trick flow set with I think it's the track heat balancer. What are your thoughts?

 

they are not worth the money....

 

The main reason I'm thinking about them is my motor has a very slight vibration. It's there in neutral and all gears. I notice it the most around 2000 rpm's. I don't know if it's normal for a mod motor with this being my first one. But a local engine shop said a new harmonic balancer should help out, so I figured I would go with underdrive pulleys if I'm changing it.

 

I used to believe this, until I tossed a set of March piggybacks on my Cobra (got em new for 50$ so I had to try em) I actually think it helped. I was running 13.1@105 on street tires and 3.73s. I put 4.10s in and UDPs and was running 12.9s and anywhere from 107-109mph

 

+1...even thought i couldn't "feel" an actual difference, they closed the gap (at the time) between my me and my bro. He used to pull me ever so slightly on the high end. After i did my Steeda's, it was basically even...i would even pull slightly sometimes.

 

people on this forum as well as mustang muscle(local shop) recommended steeda pulleys to me.

 

i have motoblue ones and they have been on the car for over a year and working great. Ive been told to stay away from the piggyback style.

 

Are you sure it was the UDP's, or the taller gears...

Well i say this cuz if the OP ever goes to a blower, they have to come off. I had a set on mine before the s/c and i really didnt notice a whole lot... The engine seemed to rev just a little faster, but thats about it.(This is what i felt)

If he plans to stay N/A, then i guess i could say go for it.. IDK, just me i guess

 

The 4.10s were in before the pulleys. Im just stating that I picked up 4mph from those 2 combined. I doubt the gear change gave me all that. I noticed with the pulleys on that it revved out a little crisper, and I believe it helped rather than hurt. I used my AC all the time an never ran into charging problems as well.

 

my plans are to stay NA. I'm planing on doing a few more bolt-ons then puting some cams in. Like I said i'm looking more at replacing the harmonic balancer then anything. I just figured I would do udp's if I was replacing it. Also I'm deffinatly not going to use the piggy back style.