Looking for some info on the best belt and tensioner combination for a pulling truck. Consistent logs of 5000+ RPM and walks the belt off the tensioner every hook. Any information is greatly appreciated!
Belt and Tensioner issues at 5000+rpm
- Thread starter Duramax_9505
- Start date
Lower your rail pressure, or go to gear driven CP3 pumps. You will never keep your belt on if your running dual fuelers over 180 MPA and 4500+ RPM.......
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Good question. My truck with an aftermarket tensioner would throw belts off every time I ran over 4000rpm. New gm tensioner and it never pitched another belt. Genuine has a plastic pulley with high sides.
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I had a used have the belt jump a rib or 2 on the tensioner while running at the track years ago, tried a new ac delco tensioner & still did it
I was told to try a dayco, so I did & never had a problem ever again
I was told to try a dayco, so I did & never had a problem ever again
Hmm, I ran stock and a dayco with a steel ribbed pulley and ran over 4500 RPM's on a pretty regular basis. I was only running 500 horse torques though.
I wouldnt expect any tensioner to withstand 5000rpm, but what the guys have said is all worth a try.
But why? They seem to work fine on the gassers? It does definitely seem like the Diesels have far more issues throwing belts at high rpm I admit. I just wonder why.
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I recently started to throw it off one rib. Have all new tensioner and pulleys. I think the long belts hurts.
You make a great point, but there's just something about our engines that belts just dont seem to stay on at rpm. I shredded a belt at a simple 3500rpm with a new Dayco tensioner on my engine way back when.
Ne-max, may be onto something, though.
I too am having issues with the belt walking 1-2 ribs and it chewing up 1 side of the belt . I bought a new tensioner at the dealership. I'm hoping it fixes it . We shall see .
Dayco tensioner here and the green gates belt. Went through 7 belts till I got the second pump aligned right and tried the dayco tensioner. Have not turned 5k but done 4500 quite a few times seeing if power was falling off up there. No issues
Torque and sudden change of rpm is the reasons. Regular melts can't take the stress.
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I thnk it's all in the system alignment. Mine would chuck belts off as well, lost power steering pump, replaced it. Spent extra time to align all the pulleys when installing the pump and no more problems...
Where does one buy a Dayco tensioner and what's the part # for the gates belt for dual CP3s in case my new OEM tensioner and Napa belt don't fix it . I'm only revving to 4200---4400 . Part # on Dayco Tensioner ?
I've also been told that there are alignment issues on my PPE dual fueler. Just sucks that I gotta spend $45 a belt each time I try something different lol 
its part of it but not all of it. even after having everything lined up perfectly, i still threw belts. only when i put the new tensioner on did it stop
you can buy it from autozone. just put your year truck in. i know, sounds like a cheap chinese part but it works. i think they have a stiffer spring in there. As for the green HD belt, i ordered mine from PPE since i was getting other stuff at the time then.
I've also been told that there are alignment issues on my PPE dual fueler. Just sucks that I gotta spend $45 a belt each time I try something different lol
trust me, i know :roflmao: i now have a spare green belt missing a rib i keep in the truck for worse case issues. i also have a spare stock belt in there should my top CP3 or the fpr converter box die on me on a trip.
Is it just the regular 70 something dollar Dayco tensioner, and not the 100 dollar dayco gold HD model?