white_lightning

My best ET was 14.221 @ 100.11 mph (at 3500 above sea level) and second best of 14.3 at 100.49 mph. I switched my tires (Sumitomo HTRZ 3's to Hankook Ventus tires) then the best run i could get was a 14.32 - 14.37 all with mphs of 99.6 to 99.8. After my UDP's were intalled I ripped off a 14.25 @ 100.49mph. So i didnt best my pre- UDP time but my mph climbed back up... this was all at the same track with roughly the same conditions. Do you think I gained?

Goldenpony

Doesn't sound like it to me. Not enough to justify the work and money anyway.

white_lightning

I got the UDP's from a dude off this forum for $100. And the install was next to free because I work at a Ford Dealership, I was hoping for a gain of at least 1/10th.

Misbehavin

UDP pulley gains are minimal usually. At best, the engine feels like it may rev a tad bit quicker. However, they're worth the fact that you're rid of the rusted factory crankshaft pulley IMO.

2007VistaBlueGT

You can't tell from that, UDP's are like 5 rwhp. The benefit of UDP is less parasitic drag on the crankshaft.