I've heard of the UR crank pullley and another one by KJR (I think) but never seen this one.

http://cgi.ebay.com/ebaymotors/NISSA...spagenameZWDVW

Anyone heard of this one or have it ?

 

The UR pulley is an underdrive pulley that is smaller than stock while the KJR pulley is the same dia. as stock but just lightened I think. I think that with the cheap cost of this one, it is just a lightened one and not an underdrive pulley.

 

When purchasing a crank pulley, quality is vital, i wouldnt trust an ebay part for this mod.

 

They appear to be underdriven as the write up tells you that you will need two new belts to use them. If they were stock replacements like the KJR pulley, you don't need new belts.

 

an underdriven crnak pulley and underdriven accessory pulleys are a big NONO when it comes to harmonic balances.

Also, do NOT use an underdriven crankpulley with a lightweight flywheel --> NONO on harmonic balances

 

I have the CNR non underdriven pulley. It is a very nice piece, very good quality. I actually sent them a stock pulley so they could fab these up. They are a machine shop and do it all in house. They know what there doing.

 

Besides the fact that I've already proven after testing (at my own expense) that hardcoating or no hardcoating, the metal is too soft to the point that the front main seal wears into the main pulley and causes major oil leaks.


This has been proved after about 5000 miles of driving. Oil began to leak from the front main seal. At first we thought that the front main seal had been damaged during pulley installation or something to cause the leak. Upon removal of the main pulley I noticed that groves had been worn into the metal that matched up perfectly to the rubber main seal. Oil had been leaking from the motor at a rate of about 1 quart per week. The whole bottom of the motor and frame had covered in oil which was then blowing oil all over the exhaust causing a burning smell after driving. This isn't the first time I've posted this information and I feel even worse since I sponsored CNR to run their GB on this site.
Since then I've no long done any other business with the company. Please take this as a warning. If you're not having any problems yet then thats good but please understand that you might in the future. If you're considering purchasing this pulley set... I wouldn't advise that at all until CNR revises their production methods to include the steel sleaving like the UR pulleys do. Or else.... Don't do pulleys at all and just do it the right way by getting a lighten flywheel. Best of luck to you all.

 

Here we go again.