928 Motorsports Sur Grip pulleys
 

I had the Sur Grip coating added to my jackshaft pulley sc side and less than 200 miles later the belt is completely shredded. From day one I noticed a ton of belt dust around the jackshaft pulley. The Sur Grip coating chewed the belt to pieces. I'm glad I had already anticipated it was going to happen and bought another Vortech pulley to replace it.

If anyone was thinking about getting the coating added, save your money. It'll destroy your belt.

Picture of my belt!

Ouch!!!

Wow. That sucks, man. Glad it wasnt a surprise.

The only surprise was when it wasn't making any boost. :rofl2:

This is another reason to only use Vortech parts like their impellers to and not 928's. I've had no issue with belt wear with Vortech's high traction pulleys.

:iagree:
The problem is Vortech doesn't make a high traction 3.47 pulley. The 3.47 with the Sur Grip coating was Vortech with the 928 coating added. When I got the pulley back from coating I knew it was going to be an issue because it looked like 80 grit sandpaper.

Thanks for the heads up lol.
Was about to do that in the future too.

I think you need to step away from the 928 products for a while. :)

I just got off the phone with my mechanic. He pulled my sc today and spun the pulley by hand. He said that when spinning the pulley back and forth he can feel a slight clunking like bearing play. This is with the 928 ceramic bearings.

I don't know if slight play is normal. The pulley and impeller weren't rocking like if there was shaft play. The bearings only have maybe 500 miles on them. Being that I haven't heard of anyone else having issues with their ceramic bearings, it's hard for me to believe that mine are bad.

Needless to say, I sent an email to 928, we'll see what they say.

Good luck hopefully they will make it right.

I think that's just gear backlash. Turbos do not have gears so they do not witness this.

Thanks Aaron. That make's sense. I'm starting to lose confidence in 928 so that concerned me.

:iagree:

I got an email reply from Carl at 928. He verified the clunking is gear lash just like Aaron said. That's good news. Thanks Aaron.

A little update: Come to find out due to the ton of belt dust coming off the 928 pulley, the dust actually packed in and around the idler pulley bearing and seized it up. That's what ultimately shredded the belt. Good thing I have a couple of extra's laying around.

Wow this is the first for me to hear this of 928. I’ve been referred to 928 for upgrades especially for their Super-Vortech package. From what I’ve read on them they’ve been in the game for awhile. Has their products/Customer Service depreciated????

Evidently, I must have been getting belt slip from the Sur Grip pulley starting right after install (evidenced by the amount of belt dust). It made 14.8 psi when Seb tuned it right after the pulley install. I changed out that pulley to the Vortech smooth pulley and the Gates rpm belt and did a couple of logs for Seb. The good news is, I've got zero belt slip (no belt dust at all). It's now making over 16 psi. The bad news is, my injectors are now running at 115% duty cycle. Look's like I'll be upgrading to 1300cc injectors and CJM's twin pump set up.

Why not ID1700's? Same price as ID1300's.

It was discussed but there's a concern about rough idle with the larger injectors.

I run 2000's and idle is fine... this is an old notion. get the 1700's and have fun. ID1700 can idle like stock.

I've already got the 1300's. I asked Seb about going to 1700's because eventually I'll be going to V7 sc and wanted to make sure I wasn't going to have to upgrade injectors again and he said (if I remember correctly) that the 1300's are good for 850hp. I don't plan on exceeding 700.

My car goes in for ecu re-flash and re-tune next Wednesday.