I have been using the Griptec hub and 2.85 pulley it has been great. Decided to go e85 so I wanted a 2.50 upper pulley I could run with my stock pinned lower balancer. The Griptec pulley has a micromachined finish to help with belt slip so I wanted to try it. My goal was to run the 2.50 upper pulley with the stock pinned lower, correct belt and stock belt tensioner. Griptec sent me a 2.50 upper to test. My set up is a Griptec hub made out of titanium, Griptec 2.50 pulley with titanium bolts, stock lower pinned, Gates green K100570HD belt and tensioner lines up perfect with mark, HHP dual Walbro 450 fuel pump set up, ID1340cc injectors, NGK 2309 plugs, gutted cats, 180 thermo, DSS aluminum driveshaft, Perf. Development brace on the stock 2.62 rear and Tim Barth doing the tuning. Car made 885 hp and 878 tq on third pull while Tim was tuning it remotely. Final tune was probably closer to 900 on both. I have been running this set up for a couple of weeks and at the Wana Go fast 1/2 mile event in Ocala, FL with no problems or belt slip, not even on hard downshifts. Have not seen much belt dust at all. Very happy so far. Jokerz Performance sells the Griptec pulleys dont know if they have the 2.50 yet?
jonjonday
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