Speed Pulley Operation

gobucks · Post by **gobucks** » Mon Jun 09, 2008 2:58 pm

Just wondering, if the belt rides higher up on the pulley doesn't that mean that the belt streches out more, how does that work without being bad for the belt?

Kenny_McCormic · Post by **Kenny_McCormic** » Mon Jun 09, 2008 3:46 pm

No the rear pulley spreads out more to compensate which also giver higher gearing, a 1/2 inch auto belt will do the same thing as the pully mod without the machine work and re centering.

gobucks · Post by **gobucks** » Mon Jun 09, 2008 5:11 pm

thanks, good info

stillspeeding · Post by **stillspeeding** » Fri Jun 13, 2008 4:03 am

Never use a belt from an atuo store because it has a lower rpm rating and if you get hurt you can't sue them, you can do a Japan dio 3 pin rear pulley conversion= 7mph gain, contact vt cycles for info.

Kenny_McCormic · Post by **Kenny_McCormic** » Fri Jun 13, 2008 10:43 am

stillspeeding wrote:Never use a belt from an atuo store because it has a lower rpm rating and if you get hurt you can't sue them, you can do a Japan dio 3 pin rear pulley conversion= 7mph gain, contact vt cycles for info.

Only with an elite, a spree has semi fixed gearing, thats the only reason the auto belt works. I know where there is a Chevy 327 that will make 10k and doesn't have a problem with cheap belts.

monkeywrench · Post by **monkeywrench** » Fri Jun 13, 2008 8:38 pm

Kenny_McCormic wrote:
stillspeeding wrote:Never use a belt from an atuo store because it has a lower rpm rating and if you get hurt you can't sue them, you can do a Japan dio 3 pin rear pulley conversion= 7mph gain, contact vt cycles for info.
Only with an elite, a spree has semi fixed gearing, thats the only reason the auto belt works. I know where there is a Chevy 327 that will make 10k and doesn't have a problem with cheap belts.

ok called vt about this setup and they said to change crank shafts to make up for belt line up so they wouldnt be angled wrong from the variotar to the clutch sounds interresting though for 7 mph gain