anyone with turbo viper blowing belts?

[Studroes144]

New gates belt came in today, too bad it was a few hours too late as we already headed out for our ride. Did a bunch of play racing when we got back, made half a dozen passes or so with my viper and just had to quit..no where near the performance on mine with the 8dn belt as what I get with the gates.

 

[cannondale27]

New gates belt came in today, too bad it was a few hours too late as we already headed out for our ride. Did a bunch of play racing when we got back, made half a dozen passes or so with my viper and just had to quit..no where near the performance on mine with the 8dn belt as what I get with the gates.

Be sure to clarify that you switched your clutch setup to run the Gates. That's important that people realize that belts affect clutching a lot and it seems to me any belt can be clutched for. Just different clutching. Some people are not going to want to start all over with clutching. Studroes I believe you are happy but you were also happy with 8dn setup. Prove the performance increase with numbers or race results. Sorry bud but I think you know why I am stating this. Many will be looking for something that may not be there.

 

[ClutchMaster]

Be sure to clarify that you switched your clutch setup to run the Gates. That's important that people realize that belts affect clutching a lot and it seems to me any belt can be clutched for. Just different clutching. Some people are not going to want to start all over with clutching. Studroes I believe you are happy but you were also happy with 8dn setup. Prove the performance increase with numbers or race results. Sorry bud but I think you know why I am stating this. Many will be looking for something that may not be there.

Pulling a couple grams out on your weights hardly constitutes "starting all over" on your clutch setup. We are all entitled to an opinion, let's not infringe on our 1st amendment rights. I'm sorry that studroes and myself don't agree that the beloved 8DN belt is the best choice, let's just agree to disagree bud.

Oh that's right you wanted real world results, 2000 miles on this belt with 270hp is pretty good. Changed it before it blew. I was getting 800~1000 Miles before

 

[yamamarc]

I have a few questions in regards to clutching. Right now I'm running the Yamaha stock clutching and plan to install a aftermarket clutch kit..
Not sure who's kit yet but will figure that out this summer!
Any suggestions from those of you running turbo?
Also if I decide to bump up to the 240 kit would there be enough adjustability If i bought a kit for the trail turbo?

 

[cannondale27]

Pulling a couple grams out on your weights hardly constitutes "starting all over" on your clutch setup. We are all entitled to an opinion, let's not infringe on our 1st amendment rights. I'm sorry that studroes and myself don't agree that the beloved 8DN belt is the best choice, let's just agree to disagree bud.

Oh that's right you wanted real world results, 2000 miles on this belt with 270hp is pretty good. Changed it before it blew. I was getting 800~1000 Miles before

I don't normally run 8dn and Studroes did a lot more than pull a couple grams out. I am not infringing say what you want but don't forget key points. They are important and can lead to a lot of trouble for those who think clutch can be a pain in butt and expensive with very little if any real life gain as a reward.

 

[Studroes144]

Be sure to clarify that you switched your clutch setup to run the Gates. That's important that people realize that belts affect clutching a lot and it seems to me any belt can be clutched for. Just different clutching. Some people are not going to want to start all over with clutching. Studroes I believe you are happy but you were also happy with 8dn setup. Prove the performance increase with numbers or race results. Sorry bud but I think you know why I am stating this. Many will be looking for something that may not be there.

You're right I should've specified more. Prior to my setup now I was running the 8dn with d&d magnaforce weights and stock 43 helix. With that setup it had a lot of the snap still that I think a lot of guys are losing when going to higher boost setups. That setup was fun, quick and consistent. I've since changed to osp weights with a straight 47 helix and this setup does not like the 8dn belt, it does however love the gates belt. Since my gates belt bit the dust (1500 miles) and we had a ride planned I just threw on an 8dn, set deflection and went with it. Here's where clutch theory and real world don't line up, theory would say a belt with more grip will pull down rpm, gates belt is definitely more grippy than the 8dn..well it did the exact opposite. With gates belt setup I have it dialed to pull 9200 and climb to 9400 on a long pull at 10 psi. By simply putting an 8dn on which is less grippy and you'd think it would raise rpm, it actually lost rpm, would only turn 87-8800, could feel heat coming off clutches through my boot and wouldn't allow it to build boost, would only pull 8psi. Probably could've pulled the helix off and tighter the secondary 1 or 2 holes and it would've helped but not ideal. Wasn't worth it for me to swap out helix, spring and weights just for 1 ride since I had a new gates belt coming.

 

[ClutchMaster]

One pound of boost equals around 300 rpm on my sled. That may explain why you lost rpm. If your engine is reving anything above 6000 rpm you should have no trouble building full boost. I would check for boost leaks or boost controller issues, tubing, etc.

 

[cannondale27]

You're right I should've specified more. Prior to my setup now I was running the 8dn with d&d magnaforce weights and stock 43 helix. With that setup it had a lot of the snap still that I think a lot of guys are losing when going to higher boost setups. That setup was fun, quick and consistent. I've since changed to osp weights with a straight 47 helix and this setup does not like the 8dn belt, it does however love the gates belt. Since my gates belt bit the dust (1500 miles) and we had a ride planned I just threw on an 8dn, set deflection and went with it. Here's where clutch theory and real world don't line up, theory would say a belt with more grip will pull down rpm, gates belt is definitely more grippy than the 8dn..well it did the exact opposite. With gates belt setup I have it dialed to pull 9200 and climb to 9400 on a long pull at 10 psi. By simply putting an 8dn on which is less grippy and you'd think it would raise rpm, it actually lost rpm, would only turn 87-8800, could feel heat coming off clutches through my boot and wouldn't allow it to build boost, would only pull 8psi. Probably could've pulled the helix off and tighter the secondary 1 or 2 holes and it would've helped but not ideal. Wasn't worth it for me to swap out helix, spring and weights just for 1 ride since I had a new gates belt coming.

Thanks Studroes

 

[Studroes144]

One pound of boost equals around 300 rpm on my sled. That may explain why you lost rpm. If your engine is reving anything above 6000 rpm you should have no trouble building full boost. I would check for boost leaks or boost controller issues, tubing, etc.

New gates belt on and back to normal, the 8dn just for whatever reason does not like that setup..of course I haven't tried real hard to dial it in, it definitely slips in the secondary and to me it feels like the slipping is keeping it from building boost. Tighter secondary wrap, maybe less weight in the weights, less helix...I'd adjust on that til I was right back to the setup I've had for the last couple years which worked great but I'm more pleased with the gates setup as it's doing what I want out of the sled.

 

[Mitch Desorcy]

I was blowing belts 8dn every 400 miles. That is with machined secondary and primary. I spoke to Dave from Hurricane, told me how to adjust the off set. I was out. Not the normal way to adjust off set. You have to get the clutches to 1-1 ratio and put good straight edge behind the secondary and measure the distance between the straight edge and belt from secondary and primary. Belt has to be parallel to the straight edge along the whole length of the belt, if not re-shim the secondary. I did this this season and belt dust was nearly a none issue compared to before and clutches were just warm after a good wide open 1 mile pull and there were plenty! Put 1000 miles on the belt UNTIL I BLEW MY HEAD GASKET.