Idea for fixing SC belt slip
Thread Starter
Melting Slicks
Joined: May 2000
Posts: 2,148
Likes: 1
From: Chandler AZ
Idea for fixing SC belt slip
Ok here's a crazy idea- and I apologize for the lame drawing...
Traction = (coefficient of friction) * (contact area) * (force applied)
We use stickier rubber belts or trackbite to help the first; $1000 8-rib pulley systems to increase area; higher belt tension for more force (which destroys your gearbox bearings). But what if you could increase the belt to pulley contact pressure without increasing tension and sideloads? Use a spring and a couple rollers to apply force directly to the back of the belt pushing it against the pulley...
Traction = (coefficient of friction) * (contact area) * (force applied)
We use stickier rubber belts or trackbite to help the first; $1000 8-rib pulley systems to increase area; higher belt tension for more force (which destroys your gearbox bearings). But what if you could increase the belt to pulley contact pressure without increasing tension and sideloads? Use a spring and a couple rollers to apply force directly to the back of the belt pushing it against the pulley...
Race Director
Joined: Feb 2002
Posts: 11,268
Likes: 14
From: Honolulu, HI
Re: Idea for fixing SC belt slip (gcrouse)
I think the only down side to that is more drag on the motor if the pressure has to be too high to squeeze the belt through. Sortof like a clothes ringer.
But I could be wrong.
:cheers:
But I could be wrong.
:cheers:
Le Mans Master
Joined: May 1999
Posts: 6,519
Likes: 1,305
From: Windermere FL
Re: Idea for fixing SC belt slip (gcrouse)
Hmmm this gave me an idea. It might be easy to build.
1. Build a C structure out of aluminum bar. Instead of being rigid like a C-clamp, the top and bottom would pivot.
2. Run two heavy springs from the top and bottom back to the middle to prvide the tension.
3. Mount your rollers on the end.
4. Then bolt the middle part to the bracket.
My only question would be would the two rollers provide enough surface area to prevent the slipping?
[Modified by Flame Red, 12:49 PM 9/16/2003]
1. Build a C structure out of aluminum bar. Instead of being rigid like a C-clamp, the top and bottom would pivot.
2. Run two heavy springs from the top and bottom back to the middle to prvide the tension.
3. Mount your rollers on the end.
4. Then bolt the middle part to the bracket.
My only question would be would the two rollers provide enough surface area to prevent the slipping?
[Modified by Flame Red, 12:49 PM 9/16/2003]
Thread Starter
Melting Slicks
Joined: May 2000
Posts: 2,148
Likes: 1
From: Chandler AZ
Re: Idea for fixing SC belt slip (Flame Red)
The rollers give 4 distinct "bite" points; I don't think it takes much additional pressure to dramatically increase belt friction. Plus you wouldn't want too much or it would destroy the belt. I do know that my "tensioner helper" worked wonders; but I can't add too much belt tension without destroying bearings.
I saw somebody else cut lateral slots across their pulley to give the belt something to "bite" on. Hey if we could machine slots in there to match up with the Gatorback belt, haven't we almost created a cog drive?
There's just gotta be a better way to solve this than > $1000 for an 8rib drive (which is better but not perfect); I mean you can get a complete SuperRam for that $$$$...
I saw somebody else cut lateral slots across their pulley to give the belt something to "bite" on. Hey if we could machine slots in there to match up with the Gatorback belt, haven't we almost created a cog drive?
There's just gotta be a better way to solve this than > $1000 for an 8rib drive (which is better but not perfect); I mean you can get a complete SuperRam for that $$$$...
Advanced
Joined: Aug 2003
Posts: 88
Likes: 0
From: Yardley Pa
Re: Idea for fixing SC belt slip (gcrouse)
10 years ago my buddy had belt slippage on his vortec powered mustang and we used a 2 pulley setup to make more of a loop for more contact area I can't figure how to put my horrible picture I made so you guys can get the jist of it. How can I post a pic? [IMG][/IMG]
Race Director
Joined: Feb 2002
Posts: 11,268
Likes: 14
From: Honolulu, HI
Re: Idea for fixing SC belt slip (1992LT1)
How can I post a pic? [IMG][/IMG]
Hope this helps, I want to see these pics. :cheers:
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Thread Starter
Melting Slicks
Joined: May 2000
Posts: 2,148
Likes: 1
From: Chandler AZ
Re: Idea for fixing SC belt slip (krivera)
yeah i like the one where you use the idler arm to not give so easy i forgot who did it on this forum
Safety Car
Joined: Apr 2001
Posts: 3,525
Likes: 2
From: Houston TX
Re: Idea for fixing SC belt slip (gcrouse)
My idler arm moves about 3/4" when you "rap" the throttle from idle. Kind of looks like the belt "winds up", then the idler pulls it back taught. I thought the idler was weak, but when the belt is released, it seems to have good tension. I don;t seem to have much "dust", so it appears not to be slipping. I produce 9 psi at 6100 RPM, but I am only turning like 46,000 RPM blower speed vs the max of just over 60,000.
I run a stationary idler on another corvette, and it seems to do fine, with no slip.
Maybe I'll look closer at the idler assy when I get a clutch back in it.
Aaron
I run a stationary idler on another corvette, and it seems to do fine, with no slip.
Maybe I'll look closer at the idler assy when I get a clutch back in it.
Aaron
Le Mans Master
Joined: May 1999
Posts: 6,519
Likes: 1,305
From: Windermere FL
Re: Idea for fixing SC belt slip (AKS Racing)
Mine has belt dust all around the ATI pulley area. I was looking a doing gcrouse's idler move. Measured it and I sure do not have a lot of spare space between the alternator fan and SC pulley.
I have been used those Dayco Polycog belts with teeth. They seem to have less slip that Gates belts.
I suppose I could move it up a bit.
I have been used those Dayco Polycog belts with teeth. They seem to have less slip that Gates belts.
I suppose I could move it up a bit.