NST Underdrive Pulleys?

Quicksilvers · 10-31-2020, 09:07 AM

Over the winter season and my Z being in storage I’m going to do a engine rebuild. I have been using the Stillen underdrive crank pulley and their serpentine belt with no issues Z runs like a top! On my last dyno I seen an improvement of 5hp with the Stillen underdrive crank pulley. For engine rebuild I’m thinking about using the NST underdrive crank and alternator pulleys. Is anyone here currently using the NST underdrive pulley kit? What is your experience and do you see any side effects from using the NST underdrive pulley kit like flicking headlights etc.? Considering using both underdrive pulleys. I searched and did not find the answer I was looking for.

axmea? · 10-31-2020, 10:40 AM

Some are prone to failure....the older version. The spokes break. Stay away from those.. New versions are thicker. Despite some failures, mine have lasted. I have the older version 8 yrs running with no issues.

Rusty · 10-31-2020, 03:59 PM

Most of us track rats use the ATI Damper from MAM.

Quicksilvers · 11-01-2020, 01:11 AM

Quote:

Originally Posted by Rusty

Most of us track rats use the ATI Damper from MAM.

I think that I will give the ATI Super Damper a try this time around. I know Spoiler also used the ATI Super Damper. Bob what serpentine belt did you use? What was your experience with the ATI Super Damper did you gain any power from it? Any realistic gains?

Rusty · 11-01-2020, 01:42 AM

Quote:

Originally Posted by Quicksilvers

I think that I will give the ATI Super Damper a try this time around. I know Spoiler also used the ATI Super Damper. Bob what serpentine belt did you use? What was your experience with the ATI Super Damper did you gain any power from it? Any realistic gains?

It uses the stock belt. But it's at the end of adjustment on the tensioner. I don't have any numbers on it because I installed after my tune.

Quicksilvers · 11-01-2020, 06:24 AM

Quote:

Originally Posted by Rusty

It uses the stock belt. But it's at the end of adjustment on the tensioner. I don't have any numbers on it because I installed after my tune.

Thank you for your insight it’s good to know that the stock serpentine belt will fit with the ATI super damper but is a snug fit. Since I diagnosed the high pitched squeak noise in the front of the engine to be a faulty idler pulley seems to have went bad. I will install a new Genuine Nissan serpentine belt idler pulley and ATI super damper with a new Gates racing serpentine belt seems to work very well I have not broke one yet! Wish me happy wrenching I have my work cut out for me.

Quicksilvers · 11-01-2020, 06:29 AM

Although people have told me in the past that there are gains to be had using the ATI super damper. Anyone interested in the NST pulleys I have a coupon code pm me.

projectpanda · 11-02-2020, 01:53 PM

Quote:

Originally Posted by Quicksilvers

Although people have told me in the past that there are gains to be had using the ATI super damper. Anyone interested in the NST pulleys I have a coupon code pm me.

Curious on the gains with the ATI, cause isn't it slightly heavier than the stock pulley?

I thought the main benefit of it was the smoothness it proves?

10-31-2020, 09:07 AM	#1 (permalink)
Quicksilvers A True Z Fanatic Join Date: May 2017 Location: Atlanta, GA Posts: 2,039 Drives: 2017 370z Rep Power: 25463	NST Underdrive Pulleys? Over the winter season and my Z being in storage I’m going to do a engine rebuild. I have been using the Stillen underdrive crank pulley and their serpentine belt with no issues Z runs like a top! On my last dyno I seen an improvement of 5hp with the Stillen underdrive crank pulley. For engine rebuild I’m thinking about using the NST underdrive crank and alternator pulleys. Is anyone here currently using the NST underdrive pulley kit? What is your experience and do you see any side effects from using the NST underdrive pulley kit like flicking headlights etc.? Considering using both underdrive pulleys. I searched and did not find the answer I was looking for. __________________ Mr. Clean

10-31-2020, 10:40 AM	#2 (permalink)
axmea? A True Z Fanatic Join Date: Apr 2012 Location: SoCal Posts: 6,236 Drives: WELL ZED PW 6MT Rep Power: 53241	Some are prone to failure....the older version. The spokes break. Stay away from those.. New versions are thicker. Despite some failures, mine have lasted. I have the older version 8 yrs running with no issues. __________________ >MyZ's Album< NISMO Convert/ECUTEK/Takeda CAI/F.I. HFC NR CB Carbon/F.I. 34 Row Oil Cooler/4.08 Final Drive /Powertrix+Swifts/Hotchkis/SPL/Whiteline/TWM/Zoom Engineering/EVO-R/AeroJacket Vented CF Fenders + CF Spoiler/Avant Garde-WORK/NST/Morimoto Halo/STi Clear Lenses/Carbon Signal Automotive/RJM Performance/ZSpeed Clutch Flywheel CSC delete

10-31-2020, 03:59 PM	#3 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 35,219 Drives: 2011 Nismo GM 6M Rep Power: 2684438	Most of us track rats use the ATI Damper from MAM. Optimiser, redondoaveb and Quicksilvers like this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

11-01-2020, 06:29 AM	#7 (permalink)
Quicksilvers A True Z Fanatic Join Date: May 2017 Location: Atlanta, GA Posts: 2,039 Drives: 2017 370z Rep Power: 25463	Although people have told me in the past that there are gains to be had using the ATI super damper. Anyone interested in the NST pulleys I have a coupon code pm me. __________________ Mr. Clean

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[FOR SALE] NST Underdrive Pulleys	Caweisdw	Parts for sale (Private Classifieds)	3	01-01-2016 12:42 PM
AMS underdrive Pulley	Zoren 370	Engine & Drivetrain	3	07-22-2012 04:14 PM
[WTB] Underdrive Crank 10% Overdrive Alternator 10% Pulleys	biggestsack	Parts for sale (Private Classifieds)	1	07-19-2012 11:47 AM
[FOR SALE] AMS Underdrive Pully	superfastwrx	Parts for sale (Private Classifieds)	16	09-21-2011 04:27 AM
STILLEN 370Z Underdrive Pulleys Released	Josh@STILLEN	Engine & Drivetrain	38	04-20-2009 02:21 PM