Originally Posted by AMGrasoul

FYI I gained 15 rwhp from the ASP pulley upgrade (which appears smaller than the LE pulley) and I had powerchipgroup tune my ECU. You'll need to specify a 15% reduction, and I think you'll get more out of it.

I specified 25% reduction anticipating a pulley upgrade that hasn't come yet and now I'm running rich. I would specify a 20% reduction with the LE pulley when getting your ECU tuned. You should see a 20 rwhp difference with both.

I think the ASP pulley is in the 170's but I'm not for certain. The LE pulley is 185mm, and the pulley I'm custom making at a machine shop is 192mm.