bigdo26

iTrader: (3)

After several problems, such as a broken tension bolt, and a wobbly pulley, my buddy and me finally got it right. New tension bolt, and the wobble was corrected. However, we did not manage to get it tightened up to the recommended 140 ft/lbs. I'm gonna try to get a shop to give it a tighten with an impact gun when i get my inspection done tomorrow, but i was wondering if any of you know how critical it is to have it to 140 ft/lbs? we got it pretty tight and all and its definatly not goin anywhere, but should i make a good effort to tighten it some more??

sleepermax

iTrader: (5)

I wouldn't tighten it to 140ft-lbs. Since aluminum is a soft metal, tighten it to about 120ft-lb's and you should be just fine. You've probably got it tight enough already. I've found that on two aluminum pulleys I've installed, like the Unorthodox, if I went to 140ft-lbs the bolt actually made an indentation in the pulley and almost looked liek it sunk slightly, and was almost impossible to get off.

bigdo26

iTrader: (3)

hmm.... good thought. didnt think of that aspect, the aluminum being softer. i mean that bolt is on there and isnt going anywhere, so i might pop off the wheel, give it another yank today, and be done with it. thanks for the tip

keeponsmokin

Did the pulley give you any power

slag

An underdrive pulley will not give you any power. This mod does not add hp to the car.

zooma

what size drive belts did you use. i'm planning on getting them just want to make sure i have the right belts. i have a 2k3.

Maximam

If you measure power at the wheels it does in fact give you more power. The UDP reduces the drag on the motor, which was your point. If your point was used, a free flow exhaust or intake systems all don't "add" power. It mearly reduces restriction. The accesories being an essential part of a running motor makes me think the UDP does infact "add" hp. See what I'm getting at?

bigdo26

iTrader: (3)

well it certainly doesnt make you lose power, this goes for any and all RPMs... which is unlike some modes, such as cat-back which will usually lose some low end power. throttle response is definatly better with the UDP on, and the engine is able to rev up quicker, therefore allowing the car to accelerate quicker. the hp thing gets kinda tricky though... as far as what belts to use, go to: http://maxima.theowensfamily.com/udp.html this is Studman's website and all the info you need is there (unless you have an auto tranny which is slightly different, as in my case)