Effects of underdrive pullies. - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 05-07-2008
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Effects of underdrive pullies.

I am thinking about getting underdrive oullies but am worried about the effects they will have on the a/c and electrical system. I will be putting in a system(power drainer), I live in florida so I dont want to loose any a/c abilities. I am interested in the power gains, and possibly the small mileage gain. So what can I expect?
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Old 05-07-2008
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Just get the alternator pulley as well and you'll have no difference with the a/c
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Old 05-07-2008
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I have had it now for like almost a year an the only thing you see i diff in is the alt but i have been to broke to buy that pulley you can tell the the diff when you put it on the is alot more low end torque
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Old 05-07-2008
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The alternator one doesnt come with the kit. Whats the deal?
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Old 05-07-2008
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Yeah it does if your buying the kit from stuffforyourranger.com/store
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Old 05-07-2008
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what kit are you talking about an from who?
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Old 05-07-2008
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They wont void a warrenty will they? That is an expensive kit. Any others that are cheaper? I can get a set for my mustang for like 100 bucks.
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Old 05-07-2008
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no i have all kinds of work done on my truck they don't say any thing but if it was something major with the motor i would take it all off before taking it in just to be safe
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Old 05-07-2008
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Quote:
Originally Posted by rybread5520 View Post
They wont void a warrenty will they? That is an expensive kit. Any others that are cheaper? I can get a set for my mustang for like 100 bucks.
i would keep your old pulleys just in case. i just put the underdrive pulleys on my truck. i have a 2000 watt amp and 4 130 KCs, i haven't have any problem charging or anything yet.
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Old 05-07-2008
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Sounds good. So you can feel the difference, and do they save any gas? I want them more and more.
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Old 05-07-2008
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I just bought my kit from Wayne. He's a good legit guy on the real.

Can't wait till I get em.
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Old 05-08-2008
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Originally Posted by rybread5520 View Post
Sounds good. So you can feel the difference, and do they save any gas? I want them more and more.

i know i felt a difference, but i put the pulleys, headers, and a tuner in at hte same time. i'm not sure on the gas part because my foot has been in the floor since i installed all of the stuff.
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Old 05-08-2008
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...That is an expensive kit. Any others that are cheaper? I can get a set for my mustang for like 100 bucks.
Only reason it's cheaper is because you have a 5.0, parts are plentiful and cheap for those motors.. I believe there are but only a couple of companies who make UDP kits for the 3.0L Vulcan, and wayne (www.stuffforyourranger.com) is one of them. I bought mine through him and loved them, it was one of the best mods I did to that truck.
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Old 05-08-2008
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Mine reduced alternator output to unacceptable levels. I used a smaller pulley on the alternator to compensate, but it was still too low. I took the underdrive pulley off, but left the smaller alternator pulley on.

I have a winch though, so my current demands are occasionally very high.
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Old 05-08-2008
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Well they are future plans. I've got plenty of power now, but when I add the 32's I want, i am sure I will need them. Also, when u buy a tuner. Does it have to stay connected, or can someone tune my computer for me that has one.
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