underdrive pullys worth it?
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From: Elwood, IN
Car: 1986 camaro Sports Coupe
Engine: L31 350
Transmission: 89 700R4
Axle/Gears: 3.42 gov lock
underdrive pullys worth it?
i have the chance to buy some underdrive pullys and want to know if they are worth it? the ones i can buy are the alternator pully and the harmonic balancer pully, all for about $60
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From: belle fourche,s.d.
Car: '82 z28
Engine: L83 5.7
Transmission: 700r4-1985
Axle/Gears: 3.42 posi
Re: underdrive pullys worth it?
there would be a power increase,but i don't think it
would be noticable-i tried an underdrive crank pulley on
my z28 many years ago and did not notice any
difference within the RPM range i was running(mostly
5500 max)i had all stock accesories hooked up except
smog pump and a clutch fan was used('82 v-belt
setup BTW)I did install a slightly larger than original
alternator pulley,deep groove '69-72 z28 style,as i
found my alternator belt liked to flip over in the pulley
grooves and break if i revved much higher than 5500
rpm-last time it happened the broken belt punched a
hole of about 1.5"in my SMC hood...The early z28
pulley fixed the problem.I would not use an underdrive
pulley on a CS 130 alternator-they overheat and fry if
turned too slow while a heavy current load is on the
alternator.
would be noticable-i tried an underdrive crank pulley on
my z28 many years ago and did not notice any
difference within the RPM range i was running(mostly
5500 max)i had all stock accesories hooked up except
smog pump and a clutch fan was used('82 v-belt
setup BTW)I did install a slightly larger than original
alternator pulley,deep groove '69-72 z28 style,as i
found my alternator belt liked to flip over in the pulley
grooves and break if i revved much higher than 5500
rpm-last time it happened the broken belt punched a
hole of about 1.5"in my SMC hood...The early z28
pulley fixed the problem.I would not use an underdrive
pulley on a CS 130 alternator-they overheat and fry if
turned too slow while a heavy current load is on the
alternator.
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