NST lightweight pulleys
 

My very first MOD 2 years ago. Driving home from the track after only 2 sessions today the NST crank pulley let go. It broke all 4 of the flanges just above the Crank bolt flange. I will snap a few pics for GP. I have the stock one in the garage, hopefully I can get it back on for this weekends racing.

Be warned stay away.:mad:

Noted.

You are the first whom I've heard of with an issue. :(

I've beat on mine canyon carving for years now even in hot weather, and I've yet to have any problems. :driving:

Sorry to hear about it though. :ugh2:

Interesting. Subbing for updates and pix.

Pics of what I got. Pulley was laying on drivers side undertray. Anyone have a good way to lock the driveline. Got the PB blaster soaking on it now.

http://i937.photobucket.com/albums/a...pszqdcjfxu.jpg
http://i937.photobucket.com/albums/a...psgvpv0tzh.jpg
http://i937.photobucket.com/albums/a...pshub5lpiq.jpg

Damn.

Wow i almost got those Pulleys

hum talk about coincidence, I removed my front mount turbo tonight to work on some shielding, i might switch back to the oem pulley tomorrow because I had the NST for the pass 5 years!

Your's is not the first that I know of. I'm going to make you worry now. Did it damage anything else? Wonder if it damage the crank? This is the reason I don't like these.

When mine broke on the LT1 cheby I had. It took out the crank and radiator too. The crank broke in front of #2 crank bearing. The pulley went through part of a 4 core radiator. It was explained to me by the guy who balanced and built my LT1. That when you change the dampener to a lightweight dampener. You change the harmonics in the crank. I had changed to the lightweight after I had installed the motor. So it was not balanced with everything else.

Here's some pic's I pulled.

Carnage, Ouch. Only thing I may put on is an ATI damper in stock size.

Nope it didn't even hit the crankcase. I think it snap jumped up from tension or just rotated out and plopped onto the undertray. I thought it was track rubber coming off the tires...until I noticed my brake light, battery light, and no charge going into the batt. No PS is a bitch on 285 R1'S

I'm hoping you got lucky. i can just imagine going from ps to no ps and going in your mind, WTF???

They are making one, i talked to someone from ati. Should be our within next couples months.

There is a guy here in Houston that has had this issue as well. After looking further into it, I discovered that mine is a newer design with thicker spokes. I'm guessing the design had been updated to avoid this very issue.

This is the old one:

...and this is the new one:

Seems like it's not worth it to change out pullies