NST lightweight pulleys

Rangerz · 06-19-2015, 06:53 PM

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.

Trips · 06-19-2015, 07:04 PM

Quote:

Originally Posted by Rangerz

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.

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.

Sorry to hear about it though.

Zbrah · 06-19-2015, 07:11 PM

Interesting. Subbing for updates and pix.

Rangerz · 06-19-2015, 09:00 PM

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.

370Z JT · 06-19-2015, 09:04 PM

Damn.

Elmo370z · 06-19-2015, 10:07 PM

Wow i almost got those Pulleys

Megan370z · 06-19-2015, 10:43 PM

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!

Rusty · 06-19-2015, 11:00 PM

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.

Spooler · 06-19-2015, 11:13 PM

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

Rangerz · 06-20-2015, 12:27 AM

Quote:

Originally Posted by Rusty

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.

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

Rusty · 06-20-2015, 01:00 AM

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

Elmo370z · 06-20-2015, 02:27 AM

Quote:

Originally Posted by Spooler

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

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

12nismo · 06-20-2015, 01:40 PM

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:

12nismo · 06-20-2015, 01:48 PM

...and this is the new one:

NoirG · 06-20-2015, 02:01 PM

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

06-19-2015, 06:53 PM	#1 (permalink)
Rangerz Enthusiast Member Join Date: Jun 2013 Location: Northern Utah Age: 59 Posts: 476 Drives: 2012 370 Nismo Rep Power: 12	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. __________________ Stillen Gen III/ NST/ Fast Intentions Non-Res HFC & 12" Resonated CF TDX/ Setreb series 9 OC/ SPL upper control arms/ Whiteline front & rear swaybars/ Uprev tuned by Seb@specialtyZ/ 319HP 262TQ/ Z1 PS Cooler/ Z1 SS Premium break lines/ CJM Road Race pump/Carbotech F:XP10 R:XP8 Nismo OC DIY

06-19-2015, 07:11 PM	#3 (permalink)
Zbrah A True Z Fanatic Join Date: May 2013 Location: The370Z.com Posts: 4,956 Drives: 370Z Rep Power: 5452	Interesting. Subbing for updates and pix. __________________

06-19-2015, 09:00 PM	#4 (permalink)
Rangerz Enthusiast Member Join Date: Jun 2013 Location: Northern Utah Age: 59 Posts: 476 Drives: 2012 370 Nismo Rep Power: 12	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. __________________ Stillen Gen III/ NST/ Fast Intentions Non-Res HFC & 12" Resonated CF TDX/ Setreb series 9 OC/ SPL upper control arms/ Whiteline front & rear swaybars/ Uprev tuned by Seb@specialtyZ/ 319HP 262TQ/ Z1 PS Cooler/ Z1 SS Premium break lines/ CJM Road Race pump/Carbotech F:XP10 R:XP8 Nismo OC DIY

06-19-2015, 09:04 PM	#5 (permalink)
370Z JT A True Z Fanatic Join Date: Jan 2010 Location: United States Posts: 2,905 Drives: 370Z PW 7AT Rep Power: 378	Damn. __________________ Click for My Journal Top Secret \| EVO-R \| Fujimura Auto \| Shine Auto \| Seibon \| MRWorks \| Swift \| SPC \| SSR \| UpRev \| Project Kics \| NST \| Titek \| Eibach \| Nismo \| Whiteline \| Quaife \| Invidia \| Fly1 \| CF Element \| Carbon Signal

06-19-2015, 10:43 PM	#7 (permalink)
Megan370z A True Z Fanatic Join Date: Oct 2009 Location: Canada Posts: 1,156 Drives: 370z Rep Power: 24	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! Rangerz likes this. __________________ Megan Journal Click Me ....................One Man Team Motorsport Click Me

06-19-2015, 10:07 PM	#6 (permalink)
Elmo370z A True Z Fanatic Join Date: Apr 2013 Location: st. petersburg Posts: 5,709 Drives: 09 nissan 370z Sp M6 Rep Power: 295378	Wow i almost got those Pulleys

06-19-2015, 11:13 PM	#9 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,850 Drives: 2013 Nismo 370z Rep Power: 2684392	Carnage, Ouch. Only thing I may put on is an ATI damper in stock size.

06-20-2015, 01:00 AM	#11 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 35,241 Drives: 2011 Nismo GM 6M Rep Power: 2684438	I'm hoping you got lucky. i can just imagine going from ps to no ps and going in your mind, WTF??? Rangerz likes this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

06-20-2015, 02:01 PM	#15 (permalink)
NoirG A True Z Fanatic Join Date: Jun 2011 Location: West palm beach Posts: 1,113 Drives: G37S Rep Power: 16	Seems like it's not worth it to change out pullies abm89, Elmo370z, Rangerz and 3 others like this. __________________ http://www.myg37.com/forums/build-th...ld-thread.html

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