>>Got the 17% pulley installed at Helix yesterday. Went from stock to 17%, my only other mod is the Madness intake. I can report that everything I read about the upgrade is true. Car starts making good power about 500-800 rpms earlier :smile:
>>
>>Paul.


Congrats on the your pulley. It's AWESOME isn't it. Now that I have a pulley and exhaust on my MCS, I acutally miss it when I don't drive it and that says a lot since my other car is a Corvette Z06 with 405hp stock. No, the MCS is not near as fast as the Z06 but it's a soooo much fun.

RaceCarDriver

 

Well apparently, my butt-dyno is right on! I estimated that the 19% pulley felt about 50-60% of the difference of the 15% pulley. Well Helix has seen the 19% make 6-8lbs MORE torque than the 15%. If the 15% averages 15lbs of torque, that would put the 19% at 21-23lbs of torque (40-53% more torque)!