What purpose does a underdrive pulley serve?
#1
10-13-2009, 06:52 AM
Join Date: Sep 2009
Location: Southern Indiana
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#2
10-13-2009, 10:06 AM
Mainly, they separate you from your money.
On an engine that revs MUCH higher than stock (like a drag racer), it prevents the accessories from overrevving, and reduces the torque they take from the engine. But since most are self-regulating (alt, A/C, P/S), they take the same power, so that's moot. And they make it harder to find the right belt since you end up with a different length.
On an engine that revs MUCH higher than stock (like a drag racer), it prevents the accessories from overrevving, and reduces the torque they take from the engine. But since most are self-regulating (alt, A/C, P/S), they take the same power, so that's moot. And they make it harder to find the right belt since you end up with a different length.
#3
10-13-2009, 10:19 AM
I used this set for a while:http://www.troyerperformance.com/cgi...talogno=528774
UPs don't add enough to justify the expense and energy to install them imo. You will not likely feel any difference in power.
UPs don't add enough to justify the expense and energy to install them imo. You will not likely feel any difference in power.
