Belt Slip! How To Spot It And Can A Smaller Pulley Fix It?!?

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[wiseoracle]

This motivated me to switch belts. I bought it a year ago and haven't swapped it. I never knew all that thick dust was from the belt. Good info.

[darrenfielder]

This is great timing, just put a 2.9 pulley on my G8 GT. Experiencing belt slip already going from a 3.3. Gonna try a little smaller new belt but if that doesn’t work I’ll be ordering a sur-grip.

[patonbike]

Did the laser alignment tool solve issues for you? Going a little crazy trying to stop slip on a 10 rib, 7" x 3.33" Vortech setup on my Subaru. It is a homebrew setup, so the only way I have lined up the belt is by eyeball + measuring distance the belt is from other objects as a reference. The setup works fine sometimes, then (seems like it happens when the belt is hot) I get this on/off/on/off slip like it is slipping then catching. I don't really see any glazing or belt dust. The SC pulley has pretty good wrap but I'm thinking of adding more idlers for the crank pulley wrap, but I would always guess the SC is the one to slip first since the pulley is smaller. I've tried Gatorback and the $$$ Gates RPM (Kevlar) Belt.

[christopherlloyd]

I am still going through the process of turning my procharge Yukon and I have experience exactly what you showed. I had dust all over the front of my pulley bracket and thought maybe I had it too tight well I loosened the tensoner and went from 16 to 13 lb of boost and the truck sputters really bad at high RPMs. Is it possible that belt slip is causing this issue? I swap plugs and I'm changing plug wires this weekend just to be sure but if it's belt slip causing it I will be so happy cuz at least now I know I can fix that

[thomasjohnson]

Well I’m running the green back but I do get a plateau effect on my boost curve with the V3 but I am running the lowest or biggest pulley until I get it dialed in then move up in boost. So I guess I need to check and see what’s going on thanks Kyle . ABT !

[patonbike]

Crack open the pulley bolt with the supercharger belt on, the SC belt will hold it in place so you don't need a strap wrench.

If you gently heat the pulley with a small torch, like a pencil propane torch, it will expand enough to come off without marring up the pulley. I destroyed a $100 pulley doing that!

[ShawnGilbert]

The other reason the rising boost curve doesn't stay linear is if the blower is out of cfm, especially as the engine gets efficient

[clarencepugh]

I just installed a FAST lxrt on my 03 SSR and I was wondering what if anything should I change on my Ecu

[intolstuning]

blowers n belts.... i had a gates blue racing belt on mine PD blower ripped 3-4 gear and on clutch release heard a crack under the bonnet thought something let go warning lights came on dash but was just the belt snapping, not good seeing MAP 200kpa instantly drop to 100kpa...

[trentdawg]

Strap wrench reminds me of my Sloan valve