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Testing Griptec 2.50 upper pulley

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20K views 33 replies 12 participants last post by  Geno  
#1 · (Edited)
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?
 
#3 ·
Nice, going with the identical setup (metco though). Dyno on street tires or drag radials, and dynojet?

Check the aluminum piece to the lower right of the tensioner pulley. I have dust collecting there from my 2.85 setup with the oversized tensioners and the tensioner is right in the middle as well. I don't hear the belt slipping, so it might just be residual from romping on it.

Tim is a great tuner, he will be doing this setup for me in the next few months.
 
#10 ·
l Iive in Ocala, FL we have e85 ten minutes away. It tested at e80. At the moment only have the e85 tune will get with Tim for the e70 and 93 tune.
Nice, I have a reliable pump about 10 minutes from home that has tested 80% since June of last year. Very good for up here in Chicago winter. This is the spot most of the guys go to. I have a station 3 minutes from home, but only 75%. I plan to test a few more so I know where the goods are. I'm super OCD about it all, and even though I don't want to test all the time, I probably will more often than not.

I drive the car year round, so I would probably run on E70 or 93 during the winter. I dislike the smell of 93 through catless, which makes me lean towards E in the winter as well.
 
#30 ·
Jeremy Satera has a Flex fuel setup that allows you to run any type of Ethanol fuel that you want and it will set up your tune to what ethanol that you're running. The bad thing is that it has to be installed in-house. The good thing is that you live in Illinois and that's where his shop is.

It's not cheap but it appears to work.

Satera Tuning Flex system....................

By the way, I have no affiliation with Satera Tuning and if this link is against forum policy, then Please remove it. I just thought that I'm not trying to sell anything, just pass on some information that might help and I'm Sorry for the hi-jack.

Back to our regularly scheduled program.
 
#14 ·
Nice, I have a reliable pump about 10 minutes from home that has tested 80% since June of last year. Very good for up here in Chicago winter. This is the spot most of the guys go to. I have a station 3 minutes from home, but only 75%. I plan to test a few more so I know where the goods are. I'm super OCD about it all, and even though I don't want to test all the time, I probably will more often than not.

I drive the car year round, so I would probably run on E70 or 93 during the winter. I dislike the smell of 93 through catless, which makes me lean towards E in the winter as well.
Yeah catless on 93 is horrible
 
#21 ·
MAXBOOST

Hey man, how you been... Yes, but it is more aggressive. If I remember Andrew said could be used for track days? I will find out. Maxboost was out running all stock pulley cars and some pulley cars at the 1/2 mile last year with his stock pulley set up. He is always ahead of the curve on making our cars faster.
 
#22 ·
I’m glad you posted about this, I’m going to call zpe monday and see if they can do my 2.75 pulley.
Looks like your car is a beast now. That was all trans/fuel cut tuning that was making my car faster. It was early in the game and it hadn’t caught on yet.
 
#23 ·
I’m glad you posted about this, I’m going to call zpe monday and see if they can do my 2.75 pulley.
Looks like your car is a beast now. That was all trans/fuel cut tuning that was making my car faster. It was early in the game and it hadn’t caught on yet.
Ya, I will pm you having trouble with figuring out my tcm tune. we