sluggoZ

iTrader: (129)

I'm very interested.....thanks for your time!

Waiting on more results.....
BTW did you happen to weigh the difference between stock?

CircleHeartX

stock are much heavier.

sluggoZ

iTrader: (129)

There ad says that they respond to messages with-in 24 hrs.....so far, over 3 days have passed.....no response!

Escobar

iTrader: (27)

no, i didnt weigh them, but the stock was MUCH heavier...you will be amazed with the size and weight difference between stock and these or any type of UR lightweight pulley for that matter.

Escobar

iTrader: (27)

I have had these on now for about 2 months and they still are operating great...just for an update

sluggoZ

iTrader: (129)

Thanks for your update!

NISMO_558

iTrader: (1)

Did you feel the monstrous hp you gained with them?

Escobar

iTrader: (27)

I dont think anyone EVER said anything about "monstrous" gains dude.

Jeff92se

iTrader: (4)

how did you replace the alternator pulley?

NISMO_558

iTrader: (1)

It was purely sarcasm, I just get a kick out of the people who say "they could feel the power", they must have a very sensitive butt dyno.

Neu Era

iTrader: (3)

usually removing the alternator.

Escobar

iTrader: (27)

yes, you have to dismount the alternator and put an impact wrench on it.

herrschaft

I had the UR underdrive pulleys installed a while ago and didn't notice any difference, except the AC wasn't as cold as it used to be. The shop that installed them did a before and after dyno run but they didn't produce any gains.

andre12031948

I can. I wouldn't get them. First, one has to understand how/what adding bolt on do. That's the reason my car has so few. A crank pulley, when bolted on, becomes part of the crank/rotation. It may unbalance the engine. That can cause the oil seal to warp/leak. An unbalanced lower end, can cause more damage & of course hurt performance. If one really wants to get pulley(s), its best to get the best & newest available.

08sleeperz

iTrader: (14)

IIRC, aren't the cranks in new engines internally balanced? There has been much debate on pulleys and the safety/reliability and I believe one came to the conlclusion that since the motor is internally balanced, pulleys won't have an effect on the longevity/reliability of the motor. That is, assuming they are installed correctly with the correct sized belts. Just my

NISMO_558

iTrader: (1)

oh my, how shocking

Jeff92se

iTrader: (4)

As far as a pulley unbalancing the crank, every consider what you guys do to the OTHER side of the crank? ie.. aftermarket clutches, flywheels etc....

Steve-O Z33

iTrader: (10)

This has been my reasoning for a long time. Many of the people who say negative things about balance and aftermarket pulleys won't think twice to go with a lighter flywheel.

I will say that my experience with underdrive pulleys isn't all that great. On my last car, I had a UDP and after installing, it seemed like the car had a little more power and smoother revs. BUT after having it for some time, I had trouble with the AC (the pulley isn't turning as much as stock), and the battery wouldn't hold a charge if I didn't drive the car a lot. (Alternator pulley isn't getting turned as much either) So with that, you also have to consider that your water pump pulley is underdriven as well.

I just purchased a Stillen oem sized crank pulley b/c I think the weight saving may help but I don't think I will ever go with another underdrive crank pulley unless I can overdrive the accessory pulleys so that they have oem operation. I know on the last car I had (99 eclipse NT), they actually offered overdrive pulleys for the accessories to compensate for an underdriven crank pulley. I just never bought them before selling the car.

aslsmm

i know this may be a necro bump but i just bought the same set. just wondering how your car is responding to them now after a half year of use.