as far as I can tell they're the same damn thing

anyone know any pros or cons for one or the other?

I'm leaning towards the perf nissan one cause they're such a great vender

 

Do you have a link to the Performance Nissan one? How much does it weigh?

 

2 lbs

http://performancenissanparts.com/ca...oducts_id=5537

 

From the description and the picture, I would say that it IS the KJR pulley.

 

i've thought about that too, but was thinking maybe their race team developed it independently?

can someone confirm it or not?

 

I'm sure Jason or Tony @ Performance can confirm it. I have the KJR pulley and based on the picture on the Performance site, that is definitely the same pulley I have. The description follows KJR's fairly close too.

 

Yes it's pretty much the same. We offer this pulley for those customers who have superchargers or turbos who don't want to or can't go with an underdrive pulley style. It;s also good for those who have a high current draw stereo, who do not want to risk any alternator issues....

I will be using this pulley on my car as soon as i go with the stillen SC in a few short months...

 

It is a kjr pulley.

 

How much does the stock pully weigh? Has anybody who has this noticed a difference in performance.

 

IIRC, the stock pulley is about 6 lbs. According to KJR & UR, the lighter pulley frees up a few HP. The engine seems to spin up quicker than with the stock.

 

200 bucks? Sounds like a great deal...

 

And it will be safe with the Vortech? If so I'm ordering tonight. Help me out with some answeres if you can.

 

UR Pulley will give 8RWHP across the full RPM range...

havent dyno'ed the KJR / Stock Size light weight pulley...

The stock size light weight pulley will be great for a supercharged car...

Turbo go with the UR...

 

Question:

If you don't have to worry about F/I or a large stereo system, is it more beneficial to go with the underdrive or does it not really make a damn bit of difference?

 

it'll underdrive the waterpump and alternator, and might lose some AC power in the summer

 

Ordered mine yesterdy. Thanks for the help guys.

 

i got the ur underdrive pulley installed last month and it was money well spent. It had no negative effect on my A/C, but i did notice the increase in steering effort due to underdriving the power steering pump. All the tools you need is a short 19mm socket wrench and a 10mm wrench.

 

you'll only notice AC issues (not heater) in the summer when it gets really really hot - if it gets that hot where you live and you turn it up on full blast. It'll kinda run out of cold air faster. It actually ends up better running the AC at 60%. It only happens though when you sit and idle a lot or for a long time (ie: rush hour) - at least on my car with the UR pulley

 

Northern California is quite hot in the summer.

 

They are on backorder so it looks like its gunna be a while