does anyone notice a sound change of the engine after installing UDP(unorthodox pulley)? ...it sounds like a G-35 exhaust or something similar, not loud but noticeble. Is this normal?

 

It's probably the G35 spoiler you have.

I do not see how a pulley would affect the sound of the exhaust:

 

the funny thing is that i dont think its coming from the exhaust, its from the engine bay.

 

So... how does the G35 sound different from the FWD VQ35...in the engine bay?

Check your work and see if everything is installed correctly.

 

i meant that the sound that is coming from my engine bay sounds like a G35 exhaust only at certain RPM levels (around 4k-5k).

everything is fine. belts arent loose or anything.

 

Belts could be too tight.

 

how do i figure out how much to tighten or to loosen?

 

Apply 22 lbs in middle of belt (or pull using a fish scale). For alternator, deflection should be at most 0.16 inch for a new belt. For PS, max deflection is 0.28 inch. Its not much. Over tightening is hard on accessory bearings. Stay a tad on the loose side. If you turn on the A/C and the belt squeaks, then it too loose.

Check maintenance section, p:12 of service manual. Download a free copy from http://www.phatg20.net/modules.php?n...titleA&show=10

 

i used two fingures and pressed it down. it goes abt a half inch down with a little force( id say abt 25lbs to 30lbs of force). Is tht ok? Dues told me 1/2" should be fine but didnt tell me with how much force.

 

I tightened mine to the point just so belts dont squeal. Initially, there was a slight squeal, so I tightened it slightly until squeak went away. This makes sure they arent overtightened. The rule of thumb is 1/2" deflection when u press down the belt in middle of the accessories.