Hey I see most people are running the Underdrives.. However I was always under the impression that running an underdrive pully massivly slowed down your alternator and water pump.. Have any of you had charging or cooling probelms when running these under drive pulleys. If not what one do u recomend. And is it worth the power gain.. Thanks Rich

 

Hey I was wondering if anyone knows anything about this... Thanks again Rich

 

Your water pump is driven by the timing chain, not the alternator belt, so it won't be changed at all.

Your alternator will become slightly under-driven, but it shouldn't be a problem unless you've got some crazy stereo that draws all your alternator currently produces.

 

Alright nice.. Thankyou for the input... I think I will go ahead and get one unless anyone recomends not doing it.... Please speak up if you do not

 

dpends on which brand you go w/...... I think its RVM that everyone says stay away from....

Im guessing that UR is the "safest" but its also really expensive

 

Keep an eye on this thread

http://forums.maxima.org/showthread.php?t=281924

 

Well, I haven't used the cooling system yet seeing as its winter(I hate cold/snow) but the power draw/alternator seems to be fine but I have a cap. Its only 15% smaller so if there is an issue it would only be at idle, but many people have gotten this and attest to the fact that it doesn't effect any accessories.

 

sometimes if u change out ur stock flywheel or a udp, u would have to make the motor balance out, so if u change out the udp which is light weight and smaller, u would have to do the same thing to the other side of the motor which is change out the flywheel to a lighter weight so then there wouldn't be any crankshaft flex.

 

Hey I was wondering if anyone else has had bad experiences of just chaning out the pulley.. Because I know if you change out flywheel you should get the whole engine rebalanced... Thats spendy.... Let me know guys