underdrive pullys yes or no

[02chevyls1]

do underdrive pullys actually give you hp gains on a dyno. are they worth it to put them on.

[yournamehere018]

About 10 or 15hp normally. If you get them make sure it comes with an alternator pulley so it puts out enough power.

[keniff]

i have just an UD pulley no ALT pulley...works great imo.

i didnt notice a "seat of the pants" difference but we'll see what the track says.

[truckinL33]

i have just an UD pulley no ALT pulley...works great imo.

i didnt notice a "seat of the pants" difference but we'll see what the track says.

.01-.02 seconds faster

[DBRODS]

.01-.02 seconds faster

Fixed for ya, usually gains of .1 -.2 tenths faster

[truckinL33]

Fixed for ya, usually gains of .1 -.2 tenths faster

That you, that's what I ment. Good thing there are lots of people on here with a keen eye

[darnie1987]

any one got a link to find some under drive pullys?

[yournamehere018]

any one got a link to find some under drive pullys?

Let me google that for you

[Beatdown Z]

If you get them make sure it comes with an alternator pulley so it puts out enough power.

IMO, if you have increased idle speed because of a cam or such, there's really no need for the alt. pulley.

[Tank]

Let me google that for you

I have never seen this before!