B18c JRSC Belt problem
Charger belt always snaps off/shredded at high rpm even on the dyno.
Can't find any misalignment on the pulley we even changed to a new pulley but still the same problem. Does this issue always occur on JRSC setups? |
Re: B18c JRSC Belt problem
yep. Sadly this was a normal thing on the older Jackson SC Eaton setups. Everyone upgraded to a higher level belt, but unfortunately I can't guide you to the part number you could find in an autoparts store, since these systems are discontinued.
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Re: B18c JRSC Belt problem
Yeah I think what we got here is the older JRSC. Too bad about the issue on the belt. It was giving decent power at 280whp.
So we just need to find a higher level belt is that it? |
Re: B18c JRSC Belt problem
Originally Posted by ralph11sec
(Post 47591183)
Charger belt always snaps off/shredded at high rpm even on the dyno.
Can't find any misalignment on the pulley we even changed to a new pulley but still the same problem. Does this issue always occur on JRSC setups? http://www.ftlracing.com/shim.htm Alternatively you could have a loose alternator bolt. Lastly I recommend GATES/NAPA belts. If you can't find them go to a goodyear gatorback. Cheap belt will break. A good belt with good alignment should last a year even on high hp setups. Mine regularly see 9000+ rpm (18000 at the blower) and about 100+ 1/4 mile runs annually. On the other hand if one of the above isn't correct I'll loose belts VERY frequently. |
Re: B18c JRSC Belt problem
Originally Posted by TheShodan
(Post 47591197)
yep. Sadly this was a normal thing on the older Jackson SC Eaton setups. Everyone upgraded to a higher level belt, but unfortunately I can't guide you to the part number you could find in an autoparts store, since these systems are discontinued.
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Re: B18c JRSC Belt problem
thanks will try that. btw how would we know that the shim is already enough or the alternator is perfectly aligned?
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Re: B18c JRSC Belt problem
Look at the belt on the alternator pulley, you should be able to see if it looks like its twisting one way or another, that should give you an idea of how you need to shim it. All it takes is a small amount to send it crashing into the side of the engine from it rolling over a few ribs.
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Re: B18c JRSC Belt problem
Originally Posted by Veris
(Post 47591915)
No.
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Re: B18c JRSC Belt problem
Originally Posted by TheShodan
(Post 47592016)
At least when I ran them in 1999 it was still a problem. So if its changed great. If not....well..
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Re: B18c JRSC Belt problem
Originally Posted by ralph11sec
(Post 47591969)
thanks will try that. btw how would we know that the shim is already enough or the alternator is perfectly aligned?
To line up. 1) eye ball or use a laser 2) check for tension differences on each side of the belt 3) look for where on the belt and pulley. Typically belt will show wear on the edge where pressure is. Additionally the pulley will show more wear on the problem side. |
Re: B18c JRSC Belt problem
another way to check for misalignment
this method is easy to use when in a tight space Use the tip of your finger on the edge of the belt in the middle between pulleys push down on the edge and then on the other ...if the belt twists more on one side than the other then there is a misalignment or you can go the more exspensive route and replace your pulleys with up graded ones from ASP that have the Flange / Lip to stop the belts from comming off |
Re: B18c JRSC Belt problem
Originally Posted by MRGRIM
(Post 47594944)
another way to check for misalignment
this method is easy to use when in a tight space Use the tip of your finger on the edge of the belt in the middle between pulleys push down on the edge and then on the other ...if the belt twists more on one side than the other then there is a misalignment |
Re: B18c JRSC Belt problem
Originally Posted by MRGRIM
(Post 47594944)
another way to check for misalignment
this method is easy to use when in a tight space Use the tip of your finger on the edge of the belt in the middle between pulleys push down on the edge and then on the other ...if the belt twists more on one side than the other then there is a misalignment or you can go the more exspensive route and replace your pulleys with up graded ones from ASP that have the Flange / Lip to stop the belts from comming off |
Re: B18c JRSC Belt problem
www.aspracing.com/index.html
You'll need to call as they are not posted on the website. Additionally this won't solve the issue if alignment is not close to correct. That said a great idea. Grimm and I both run their pulleys. |
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