Thrown Belt

[Happy Jim]

Hi All,

I've got an LS1 engine in a Cobra Replica that's chewed a couple of drive belts. It only seems to happen when I kick the hell out of it and bounce off the limiter (set at 6900)...I don't do it often!

I'm guessing that I need a better/different tensioner/guide pulley set up? anyone got any suggestions or experience.

Thanks

Jim

PS, Hope you don't mind me posting here, figured this would be the most logical forum given the engine type.

[ringram]

I take it you have tried a shorter belt?
Gates do a special belt which self tensions. Its not supposed to be used with a tensioner and you have to use a special tool to fit it as its a tight fit. Internal structure in the belts shrink with use.

[tinker-27]

it is a very common problem if you rev them hard, fit a manual tensioner and problem solved, i did have some made but not sure i have and left but you can get one from the states easy enough. short belt wont help

[ringram]

How about the Aircond belt Kevin?

[MyM8V8]

ringram said:

How about the Aircond belt Kevin?

or Craig even.

ETA What about a 25% underdrive with the high walls?

Edited by MyM8V8 on Friday 16th October 12:53

[ringram]

Yeah I understand the latest pulleys have a revised wall height due to this issue.
Sadly I was not sold one of these.

Another benefit of ordering direct is getting current up to date revised products

Still at least its not draining power!

[stevieturbo]

tinker-27 said:

it is a very common problem if you rev them hard, fit a manual tensioner and problem solved, i did have some made but not sure i have and left but you can get one from the states easy enough. short belt wont help

What he said. Or just fit a new tensioner.

[ringram]

Ah, yeah, sorry I read Tiler, not Tinker! Duh.

My drive belt is fine, but my aircond one isnt. I wasnt in a position to be fussy with balancer, so went with that was available, though I understand the newer ones have a revised support wall.

The Fish boys couldnt get my 1083mm aircond belt on so its not as if it was loose. It took some effort to get it on and she was tight as.
Still came off. I understand it does it on stock vehicles and Holden has a technote out for it which requires a replacement balancer. So maybe I need a new one.. Ill try one more short one, then look to another solution. Perhaps a new model underdrive.

[Happy Jim]

Great stuff, many thanks. I'll go do a bit of searching for a manual tensioner with high walls on the roller - that should do the trick.

Thanks

Jim