I installed the LSJ supercharger on my LE5 motor. Kept the 5 rib crank, A/C, alternator pulleys; tensioner, idler and SC are 6 rib.

I cut off one rub from the belt. Does the belt work best on the front 5 ribs, leaving the back (engine side) open, or the reverse, leaving the front rib empty.

I had a bad squeal, replaced belt with new, quiet, but starting to squeal again. Currently I have it on the front 5.

 

Is it the stock SC pulley size? If not what size is it? Do you have the adjustable tensioner from ZZP or the oversize tensioner pulley?

 

3.1 ZZP Pulley. Everything else added was stock LSJ

 

Someone can prove me otherwise but I have seen members with 2.8 pulley on 5 ribs. I think the problem is not enough tension. You could either try the stage 2 belt or the oversized tensioner pulley. The pulley is cheaper at $18. The adjustable tensioner is way too damn expensive at $120 so screw that option. Here's the pulley. It requires some grinding.

Oversized LSJ Tensioner Pulley

And here's the stage 2 belt which was designed for the 3.1" pulley anyway.

Pulleys & Belts

 

Awesome to see another LE5 Supercharged... I'm in the process of getting the parts to do mine. Good question and answer.

 

Still waiting to hear does the belt go in the front of the pulley or back?

 

 

I have the stage 2 belt on a 2.9 and the adjustable tensioner. It was a bitch to install, for some reason I couldn't find a belt in between the stock as size and the GM stage 2 hat was 5 rib and double sided

 

It's actually pretty easy.

 

Just look down at the pullies...not hard to see where it lines up.

I think its towards right side