Changing to any underdrive pulley will require getting new belts.
In the UR pulley set, the other pulleys are the same size, it's the crank pulley that is different, thus the need for new belts...

if you don't want to change belt size, then the KJR pulley that we sell is your best bet...

I just installed the lightweight stock-sized KJR pulley on my car yesterday.
http://performancenissanparts.com/ca...s=stock+pulley
It made a nice difference, not huge, but i feel it. The car revs quicker, and the SC is more responsive. Worth the money

 

Chimmike,
The Z28 would ideal fine, no problems. If the car idled for 15 minutes, with the head lights on, we would have to jump start the car. He never had problem till, he replaced pulleys. It's possible the battery or alternator developed problems .The car was bought new and just over a year old when the pulleys were changed.

 

i had underdrive pullies on my celica...and decided to go with the KJR on the z. I'm much more happy with the Z than with the UR's I had on the Toyota.

 

Ok guys plain simple question i have a greddy TT which would be best the UR crank pulley or the KJR pulley for the turbo.

 

anyone top

 

For FI, go with KJR:
http://performancenissanparts.com/ca...s=stock+pulley

 

But why? i dont mean to be a pain in the rear just want to know which one makes more power

 

well on a turbo technically, you can run either pulley, the UR or the KJR.
for supercharged applications, KJR is the one that will work since you can't change the belt sizes etc...

Now, as for which one makes more power.... I haven't dynoed these to compare, but being a person who has tried both on their car, I feel that both are very similar. Any difference between the two is small at best, and not really noticeable. I have had no issues with either, both went on easily, fit well, and work well...

 

Ok thanks alot i think im going to go with the kjr sice i dont have to replace belts

 

Um...

How hard it is for installing this thing??

You guys install this by DIY or you let someone install it for you??

 

I just ordered the UR Pulley w/belts from Perf Nissan and got an email about an hour later saying that it was on back order

 

Coz at Concept Z Performance sells the UR crank pulley w/belts for a good price. Ground shipping is $1. Very happy with mine that I installed last week.

 

Just ordered KJR tonight from Performance Nissan...

 

yeah...i almost went with the kjr but changed my mind at the last second....my car has 45k miles on it though so i figured changing the belts wouldn't exactly be a bad thing....are the kjr's on back order too? just wondering

 

Guys you also might wanna check these guys out. This is the pulley I run. They have the non-underdrive crank pulley too, just not on the site yet.

http://www.cnrbillet.com/catalog/

 

what has been your experience with it? i bet its just as good as the UR and KJR's at half the price.

thanks for lookin out

 

works great, no problems. I think it weighs 2lbs.

 

looks identical to my UR crank pulley from what I can see...

 

its probably manufactured at the same place....how come not many people know about this?

 

Does anybody have a link to a PDF with installation instructions for the KJR? I'd like to see how bad it is to DIY. I just finished installing my own CAI. It took me a while, and I broke a couple of plastic tie wraps...but it went it ok. I'll be posting my installation instructions along with some clarifications that I think Nissan should put in their manual.


EDIT: found my manual http://www.kjrperformance.com/docs/K...%20Install.pdf
teaches me to post without searching the web first.

-LamaZ