I have auto 05 coupe
planing to get the main crank pulley from stillen
whats gains I hear 2- 5 hp
is it safe
can you feel the difference..
thanks

 

Just my 2 cents........

I think the gains aren't worth the risk. Others will have a different opinion and that's fine. I'm a little on the conservative side when it comes to my mods. I like to play it safe.

 

there are quite a few threads that go on.....and on......and on.....argueing both sides....seems about 1/2 and 1/2 on good mod or bad

i did a lot of reading both here and on 350Z before deciding to do it......i felt the risk was worth it..........i love the extra zip it gives the car

IMO this mod so far gave the most gains felt in my seat of the pants!

 

why would it be risky? risking money over a mod that doesnt work? or somethin else..

i'd say get all 3 and replace the belts.. well i cant really talk cause i havent done it. but im def. gonna do it within a month

 

Risking the overall health of your car. I don't care about the money. If it's a good mod and safe for my car, I'll spend the money.

Pulleys can affect the overall stability of your car. Reports of people saying it causes vibration and other issues.

I'm just staying clear of them.

 

My 4 cents - ;-)

I've run pulleys on every car I've owned for the past 12 years - no damage and you will love what you get from it...hands down - easy way to get through the bottom end a bit quicker...

 

I just got it installed today and right wen i got on it I noticed the engine had less of a load to haul and the engine revved quicker

 

thanks guys
still debating

 

Well if you want the advantage of aftermarket pulley without the risk, why not go with the fluidampr pulley? Its lighter than stock (not quite as light as the UR pulley) but it features a true harmonic damper. This would eliminate the concerns (whether valid or not) of the potential for harmonic vibrations to the crank caused by a non harmonically balanced pulley. Just my two cents.

 

aren't our engines internally balanced anyway?

Also,, which pulley company is the way to go?
unorodox?

what about the black one on performancenissanparts.com?

stillen? (or is that a UR?)

 

UR is the way to go and what everyone else sells - there are no balance issues in our cars with the pulley swap. Pulleys are the 3nd most popular mod next to CAI and exhaust...

 

ALL engines are "internally" balanced. The issue is when those cylinders start firing, vibrations are created. The vibrations change in relation to rpm. On one end of the crank is a 30-40lb flywheel/clutch/pressure plate or torque converter and on the other end is a 7lb crank pulley driving accessories. This mismatch in weight balance across the crank plus the natural crank vibration is why Nissan and almost EVERY other auto manufactuer uses two piece elastomer crank pulleys. The elastomer ring quells the crank vibration. Adding an UDP COMPLETELY removes this elastomer ring. The fact that an UDP is completely balanced is a moot and worthless point.

 

My 5 cents....

I had an UR UDP on my Maxima. I made tons of passes before and after, in various conditions, with no other changes to the car. There was absolutely nothing gained on the track or on the dyno. I too noticed the engines ability to rev quicker, but it was clear that nothing improved when the mod was put to the true test and that seat of the pants dynos are worthless. I took the UR UDP off after 1.5 years use and ended up running a new best ET/MPH a week later. Go figure.

 

true I heard also no gains and maybe 2-3 hp
not worth it, to take risk on new warranty.

 

Yeah, Just what he said. I believe you would be better off with more weight. Flywheel mass,
I have been reading that the lighten flywheel clutch combo is killing 1/4 mile times.
I tried the UD pulleys and pulled them off after 2 days. It killed my off idle derivability and made shifting just a bit more tricky. The Fluidamper made a inconclusive 3 hp on the dyno with back to back dyno testing. Just my 2 penny's