What actually causes the belt to "shred"? Supercharged Q

[justinschmidt1]

Ok so I got my blower and the day I got it back the belt hopped off the pulley and ripped....I figured this was cause of my 110k tensioner so I replaced that and all was good until last night.

I guess its been about a month but anyways, I was messing around and whipped a donut.

Then I heard that cool sound you get when your shredded belt is hitting every thing under the hood.

So I pull into my friends driveway and pop the hood and ripped off the rib that was shredded.

The thing is, the belt didnt pop off or anything.

The rib closest to the front of my car basically snapped in half since it didnt come off the pulley or anything.

Anyone know what could cause this?

 

[snidehockey]

I had a lexus that had some belt issues because the compressor mounting bolts broke and even though the compressor was still in place it would move just enough when RPMS increased that it would pop the belt off. If the belt was too tight it would come off right away, but if it's loose maybe this is the symptom? I mean you do have an aftermarket S/C so i'm sure it's not an exact science as to the size of belt? That's just speculation though as you can tell

 

[bhuff30]

It is because the pulleys aren't perfectly lined up. You may need to shim the compressor/pulley so it lines up correctly with the rest of your pullies.

 

[justinschmidt1]

Is there any way to accurately measure th alignment?

We did use shims to line it up when we first installed it.

 

[Hardtop68]

I used a long metal ruler to check the alignment of the Sanden compressor kit for my Hardtop 1968... it worked out ok...

 

[SaleenGT2001]

high revs and then letting off the gas completely caused mine to jump the PS pulley and shred the edges off. i fixed my problem with an 8 rib kit

 

[justinschmidt1]

high revs and then letting off the gas completely caused mine to jump the PS pulley and shred the edges off. i fixed my problem with an 8 rib kit

yea, I think that is one of the things that causes problems...high revvs then completely letting off.


Mine jumped when I first got it before the new tensioner but this one just kind of ripped.

The pulley looks like it is aligned perfectly so I guess I will see what happens with the new belt.

 

[Stark77]

You ought to let me do a few donuts in your car to - um - check the - um tolerances of the drivetrain ?!?!?!

 

[SaleenGT2001]

last year this time i was going thru a belt every 400 miles!!!

 

[justinschmidt1]

last year this time i was going thru a belt every 400 miles!!!

wow...I put over 1500 miles on this belt before I did some crazy donuts which Im sure was the MAIN reason it shredded( haha)

So I guess Im gonna see if this one ever shreds without me doing donuts and drifting everywhere.

 

[justinschmidt1]

You ought to let me do a few donuts in your car to - um - check the - um tolerances of the drivetrain ?!?!?!

haha....yea...my driveshaft would probably break off.

 

[joshheat25]

Maybe if you don't beat the **** out of your car, your belt will stay on :0 LMAO

 

[justinschmidt1]

Maybe if you don't beat the **** out of your car, your belt will stay on :0 LMAO

gay idea there

 

[justinschmidt1]

ok so I ripped the new larger belt in 2 days...


Maybe im using too big of a belt?

the 112.5 lasted like 1500 miles and this 112 and 7/8 was dont pretty much the first time I got on it.

Maybe I need to get a smaller belt?

I really dont think its teh alignment since the belt is popping off both ways.

 

[SaleenGT2001]

try a 111.5

 

[SaleenGT2001]

did you grind the stop tab off your tensioner to give it more swing??

 

[justinschmidt1]

Im getting a 1/2 smaller belt than before....

the belt that lasted was actually 111 inches or so


so im gonna try 110.5


I didnt grind the stop away.....what would be the benefit of that?

 

[SaleenGT2001]

grinding off the stop tab gives the tension a larger swing or operating area

 

[justinschmidt1]

grinding off the stop tab gives the tension a larger swing or operating area

Doesnt the tensioner swing back that way with no pressure on it?

Is that actually safe to do? lol