Originally Posted by saxman (Post 3230562)

:drink: You TAFC guys are insane! :D :D



I THINK that the GT's are supposed to carry about 15% more load than the HTD's.... Don't quote me on that though.

If you switch to a GT system and get bigger pulleys (same overdrive though) so more teeth can engage, but you still tear teeth off the belt, I would say that there is some other serious issue.... The GT system and bigger pulleys should have no issues carrying the load of anything under 1500hp on a good sized screw blower.

Originally Posted by Strip Poker 388 (Post 3230578)

when you say more teeth,would that be over 50?

Originally Posted by endeavor1 (Post 3230574)

Kinda like your Canadian WP...... :lolhit:

Originally Posted by Boat1 (Post 3230606)

Why not change the belt at 80 hours service. Maybe it shows no visable signs but reaches it's life span. Then you would have a spare for quick emergency.

Originally Posted by SHAWN DAVIS (Post 3230613)

We stripped the teeth back to back on new ones too. A rubber tooth 8MM will not take the load.
depending on length of the belt something like this may be a solution
http://www.rbssuperchargers.com/Stor...83&InfoID=3921

I never had a major problem with the purple dust, no worse than the rubber belts

Originally Posted by saxman (Post 3230214)

I would recommend going to RCD, and trying the gates powergrip GT belt and RCD GT pulleys (gear tooth profile, not the round tooth HTD).

I would not recommend a polychain, because they don't flex well, they are noisy as hell, and to quote BigYellowCat, after a days worth of boating, it will look like smurf exploded in your engine room. We have run the same 2 gates powergrip gt belts and rcd gt pulleys for 5 seasons with zero failures.

http://www.rcdengineering.com/

And what animalhouse said, put the tensioner on the back side of the belt if you haven't already.

You might also want to think about a different pulley combo (same overdrive ratio though) as to change how many teeth engage at a time and to change the forces on how your snouts/belts are loaded, because the snouts/cranks do flex.

Originally Posted by kap328 (Post 3230053)

Information Requested:
Anyone running a 8.3 litre Whipple supercharger with a cog belt?

If so have you had any issues with the belts?

I recently went to the Power Tour and did some fly bye's and the belt on my set-up was completely shaved smooth...there were pieces of rubber everywhere. FYI--- I run a Jason 1600 8mm cogged supercharger belt.

The belt looked like it was completely shaved of any teeth. It made a friggin mess in my engine compartment. I opened the hatch to see the belt loosely spinning around the pulley. It eventually slipped so much the engine died.

I then inspected the tensioners they were fine and turned the supercharger by hand to see if there was any binding and it spun freely. Adjusted the tensioners applied some tension to the bare belt to restart engine it fired up and limped back to the dock at idle. Note: I was lucky to have the tools onboard to make the adjustments otherwise it would have been a long tow back.

There are quite a few 8.3 Whipple motors out there this cannot be an isolated incident.

FYI: I run a 8mm cogged system as the previous set-up called for a ribbed belt and they had slippage problems trying to turn such large helical lobes.

Anyone have same or similar issues love to hear from you including any solutions?

KAP

P.S. I will call Mr. Whipple tomorrow but always want to hear from other boaters.

Originally Posted by BLee (Post 3230301)

Keep us posted if you don't mind?

I'm building new power, and planned to use the 8.3 over the 5, but I've heard about the belt issue as well. I thought they might have fixed the issue my now, so IF you have the time, could you let us know what Dustin says?

Thanks man, & good luck!