Underdrive Pulleys do they work

4244 Views 15 Replies 10 Participants Last post by Idahoan T-Bird, Dec 1, 2002

Tim Groth

Discussion Starter · Jul 22, 2002

I'm really interested in unlocking 10-12hp with the underdrive pulleys but I don't want to end up buying them to gain nothing. For all that has used them, do they really work like they say they do? Is there a noticable gain in the hp or really no change?

SCP 2 Piece Accessory Underdrive Pulley Set $105
Includes a new alternator, and crankshaft pulley.
An easy bolt on that yields 10 to 12 HP. Less parasitic drag from your accessories means more power can go to the rear wheels. These are no gimmick...they work like a charm!

1 - 16 of 16 Posts

Robinson

· #2 · Jul 22, 2002

of course they work. dont expect the 10-12 hp on your N/A 3.8 though, be happy if you can manage 7

rancherlee

· #3 · Jul 22, 2002

Just the Crank pulley was dyno tested at 8.6rwhp on an automatic 3.8L mustang, thats a 10-11hp gain at the flywheel.......... Very well worth the money, IMO its the BEST bang for the BUCK mod on a 3.8L. You only need the 1 pulley set unless you have a huge stereo system. Check out www.RPM-Mustangs.com for a good price! (I've done business with them and they are great)

Tim Groth

Discussion Starter · #4 · Jul 22, 2002

Thanks for the help!

Hey you guys really helped me out a lot! Hopefully someday I will be turning the ponies you guys turn. I take it I will need to get a new belt for this mod correct?

Thanks a lot for all the help.

rancherlee

· #5 · Jul 22, 2002

Yes a 96" belt, stock is 98.5"

JSGAuto

· #6 · Jul 23, 2002

I agree the easiest, best bang for the buck.

Jim

JJanney

· #7 · Jul 23, 2002

Also, it is an easy mod for a beginner. There is not much to taking off the old belt, putting on the pullies and then on with the new belt. I did it in an hour or so on my 5.0.

sanbei120

· #8 · Aug 30, 2002

What are the best U/D pulleys for my 3.8 lx?

I heard Steeda U/D pulleys were the best to get, but I'm not sure if that's only for V8s.. do they offer them for the 3.8 V6? if so, can someone give me a link on where to find them. I looked in the tccoa most wanted parts.... that led to summit racing.. but i couldnt find it anyway..

so...

Any help would be great.. cuz i really wanna get these in my car... and if not steeda, what else?

Thanks guys!

Rodeo Joe

· #9 · Aug 31, 2002

I've got the ASP pulleys on mine. I know MAC made a set, not sure if anyone else does. Follow the link that RancherLee gave you, they have them.

Joe

sanbei120

· #10 · Aug 31, 2002

i went to www.rpm_mustangs.com but could only find 3 "ASP Underdrive Crank Pulley" for the V6 3.8..... but they were for the "94-98 3.8 mustang," "99-00 3.8 Mustang," and the "01-02 3.8 Mustang"...

i have a '93.... so are any of these for me?

rancherlee

· #11 · Aug 31, 2002

94-98 mustang one is the one you want.

Idahoan T-Bird

· #12 · Sep 5, 2002

go with the 94-98 like rancher said...I got mine, installed it in like 15 minutes! Easy mod to do...I feel my car pick-up better, not A LOT but some...I manily feel it at 35-45 mph range....it is good for a first-time mod, but not too good with my stereo system...oops...

Wes

Jimbo

· #13 · Nov 30, 2002

Is the 94-98 stang set gonna fit on my 1990 NA 3.8?
Also, anyone know where to get three piece sets cheap?
Also do they make 4 pc sets for the 3.8's (water, steer, alt, crank?)
Also in the one piece sets, is the crank pulley smaller than in a 2 or 3 piece set or is it the same.

Rodeo Joe

· #14 · Nov 30, 2002 (Edited)

Yup! The Mustang set will work. There is only a 2 piece set for the 3.8.

Joe

Quik96

· #15 · Nov 30, 2002

?

but not too good with my stereo system...oops...
What do u mean?

Idahoan T-Bird

· #16 · Dec 1, 2002

What I meant by my stereo system is that since the crank is smaller, the car needs to be at about 950 rpm for alt to put out a full charge and with my system playing at a stop light or something, the battery dont charge to well...I need a bigger alt put on...Other than that fact, I like the pulley...

Wes

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