Underdrive Pulleys

[cul8ri1]

Does the alt pulley actually do this though, mine works just fine and I am pushing 1500 watts.

Well the size of the Alt pulley determines the speed that the Alternator will rotate at any given rpm. Like I said its more crusial at idle than anything else.

 

[Beef52751]

i did just a crank pulley and would do it again, its about the only thing ive done to my 3.0 that had a noticable increase

 

[cul8ri1]

Had anyone noticed any cooling issuies since it does make the waterpump spin slower?

 

[graff104]

Had anyone noticed any cooling issuies since it does make the waterpump spin slower?

I haven't. I was stuck in traffic hardly moving for 45 minutes a week or 2 ago and it did just fine. Not sure how this+ an e fan would do though.

 

[dranger21]

I dont mean to hijack this thread but Ive never seen these things before but it judging from what you guys have said i think i might try this. Im not running any special audio or anything so i might just buy the crank pulley for $80 and see how it does. Im assuming the serpentine belt will need to be changed then but how do i know which belt to buy since its a different size then?

 

[cul8ri1]

There is a belt size guide at stuffforyourranger.com on the belt page.

 

[coffee]

The Underdog underdrive pulleys are gold. Wayne's great to work with and Fred at Rougue has dyno results showing an 8hp and 11 ft/pds of torque redirected to the rear wheels. I've got the full set of pulleys and love them. I'm also running a 16" perma cool fan that draws 9amps and flows 2900 cfm. I've had nothing but fun with them.

 

[hoosier1104]

I will throw a set on after I get my dual exhaust put on. In the process of saving up now but I am also finishing up my motorcycle. So the ranger is going to take a back seat for a moment so I can get back on 2 wheels again. Man do I miss riding!

 

[lorenambrose]

I know the alternator has a pulley for it, but what is the effect on the AC compressor and the cooling efficiency at idle.

 

[Froggmann]

Had anyone noticed any cooling issuies since it does make the waterpump spin slower?

No cooling issues whatsoever. A couple weeks ago it was 100+ for several days, the truck stayed nice and cool with the A/C blowing cold.

 

[michowski]

I get my pulley tomorrow. Kind of excited after all the positive things said about it.

 

[Beef52751]

you wont regret it!!!

 

[michowski]

Got it on and installed. Can definatly notice it running better. It seems to be so smooth and flows through the rpm's were as before after 3 grand it just sounded like it made noise and did nothing. Can definatly feel a little more umph out of it.

 

[jasonrobo02]

I just installed mine this morning after having the pulleys sitting on my shelf for 6 months. I really wish that I had done this when I first got the pulleys. It's a noticeable difference, but as others have said, don't expect your truck to become lightning quick.