this may take a while but here goes.please correct me where im wrong and feel free to add to this.
for top speed and economy you want the secondary pressure to be as little as possible without slipping the belt
the lesser the angle the more side pressure applied to the belt via the sheaves.
you need more sheave pressure for low speed than at 1:1 or overdrive, some where in the neighbourhood of 2:1.
not taking into acoount the helix does the secondary spring maintain an even pressure on the belt as it is compressed?if so why do a lot of people run a finish angle of say 40 or 44 degrees would this not add more side pressure to the belt and cause loss of performance on top end?
this may answer my last ? but i need someone to verify. since the secondary senses torque; by running the belt pressure too light(too steep of a finish angle say 50 instead of 40)) near full shift could this prevent the secondary from opening up all the way into overdrive?
well let me try to figure this out. your side pressure increases as the clutch opens up your compressing the spring if you run a straight 47 say at b-6 and your clutch work's fine but you want to go to a 54/52 for what you think will be better gas mileage you will have to change your spring tention AND you should change your side pressure. when your motor run's the higher rpm/mph(or kph for our canadian friend's) it will pull the belt in faster with more force and cause the motor to bog down and lose rpm's and or cause the belt to slip in the driven ruining your belt and maybe even your driven clutch. in clutching every one clutch change is effecting something else so you don't usually make just one change.
well let me try to figure this out. your side pressure increases as the clutch opens up your compressing the spring if you run a straight 47 say at b-6 and your clutch work's fine but you want to go to a 54/52 for what you think will be better gas mileage you will have to change your spring tention AND you should change your side pressure. when your motor run's the higher rpm/mph(or kph for our canadian friend's) it will pull the belt in faster with more force and cause the motor to bog down and lose rpm's and or cause the belt to slip in the driven ruining your belt and maybe even your driven clutch. in clutching every one clutch change is effecting something else so you don't usually make just one change.
