Which lightweight crank pulley?

Mr. Q · 03-21-2011, 07:47 PM

I am in the market for a standard sized lightweight crank pulley and I'm having a hard time deciding which to get between the unorthodox, stillen and ams pulleys. I don't want to go underdriven but might entertain the idea.

Please give me your personal experiences and feedback and help me decide. Also I seem to remember hearing about some bad installs on the stillen pulleys due to the installation being somewhat different. Any truth?

GZ3 · 03-22-2011, 09:17 AM

I had AMS (all 3) on my 350Z with no issues what so ever so about 70k! they were excellent quality. I also know of a few others than ran just the crank UR and had no issues. I'm reluctant to buy stillen altogether, just because of all the stuff i have heard over the years, but i would think its hard to mess up a pulley. On the 370Z am going AMS needless to say, my next choice would be UR and lastly, stillen. Good Luck man

XwChriswX · 03-22-2011, 10:39 AM

NST Is another option: NST (NonStopTuning) 370Z VQ37HR Pulley Kit Review w/ Dyno Charts

Ztoon · 03-22-2011, 10:47 AM

I've had Stillens underdrive on now over a year now with no issues.
Had considered the lightweight, but gains were minimal at best.

ChrisSlicks · 03-22-2011, 11:14 AM

The issues with the pulley's isn't the design, it is the installation. Pulley's have developed wobbles because installers didn't understand the instructions, such as failing to tighten an additional 90 degrees after torquing to spec.

GZ3 · 03-22-2011, 12:59 PM

another thing to consider, the stock Crank weight is 4.5lbs i believe...the AMS is 1.45lbs and the UR is 1.07

Changed my mind, going with UR

Mr. Q · 03-22-2011, 01:02 PM

Thanks for the replies. I think the UR is winning out on the decision.

RedBullRR · 05-09-2011, 09:26 AM

I have both Pullies. Stillen Crank and Under Drive. Was given to me by a friend. But skeptical about installing these units. Think I'm going to install the main crank for now. I dunno about changing belts and going with the UR Pullie.

03-21-2011, 07:47 PM	#1 (permalink)
Mr. Q Enthusiast Member Join Date: Dec 2009 Location: Texas Posts: 349 Drives: 09 MB 370z Rep Power: 15	Which lightweight crank pulley? I am in the market for a standard sized lightweight crank pulley and I'm having a hard time deciding which to get between the unorthodox, stillen and ams pulleys. I don't want to go underdriven but might entertain the idea. Please give me your personal experiences and feedback and help me decide. Also I seem to remember hearing about some bad installs on the stillen pulleys due to the installation being somewhat different. Any truth?

03-22-2011, 09:17 AM	#2 (permalink)
GZ3 A True Z Fanatic Join Date: Dec 2009 Location: SATX Posts: 3,296 Drives: Z Rep Power: 21	I had AMS (all 3) on my 350Z with no issues what so ever so about 70k! they were excellent quality. I also know of a few others than ran just the crank UR and had no issues. I'm reluctant to buy stillen altogether, just because of all the stuff i have heard over the years, but i would think its hard to mess up a pulley. On the 370Z am going AMS needless to say, my next choice would be UR and lastly, stillen. Good Luck man __________________ 09 GT-R 12' 370Z 7AT HANDED DOWN 12'+13' 5.0 SOLD

03-22-2011, 10:39 AM	#3 (permalink)
XwChriswX WFLYIDNNE Join Date: Jul 2009 Location: In The Fastlane Posts: 50,648 Drives: 02 GDB WRX Rep Power: 451	NST Is another option: NST (NonStopTuning) 370Z VQ37HR Pulley Kit Review w/ Dyno Charts __________________ Bonnie - Stage 2, Audio build coming this fall! R.I.P. Abby 3/29/10 - 3/30/14

03-22-2011, 10:47 AM	#4 (permalink)
Ztoon Track Member Join Date: Aug 2009 Location: B.C. Posts: 578 Drives: '09 370a7 Rep Power: 24	I've had Stillens underdrive on now over a year now with no issues. Had considered the lightweight, but gains were minimal at best. __________________ Stillen G3\|CBE\|ground kit, F.I. H.F.C., C.F. fangs\|mirrors\|pillars, Hotchkis, SSR Type-F, RE-11, UpRev, BC BR coilovers 15% tint, LED black hdlts, color match handles, Dynamat, tail lt. tint, Mines C.F. frt. lip\|rear spoiler, Amuse rear,skirts, vented fenders, c.f. vented hood, gloss blk. roof

03-22-2011, 11:14 AM	#5 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	The issues with the pulley's isn't the design, it is the installation. Pulley's have developed wobbles because installers didn't understand the instructions, such as failing to tighten an additional 90 degrees after torquing to spec. __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms

03-22-2011, 12:59 PM	#6 (permalink)
GZ3 A True Z Fanatic Join Date: Dec 2009 Location: SATX Posts: 3,296 Drives: Z Rep Power: 21	another thing to consider, the stock Crank weight is 4.5lbs i believe...the AMS is 1.45lbs and the UR is 1.07 Changed my mind, going with UR __________________ 09 GT-R 12' 370Z 7AT HANDED DOWN 12'+13' 5.0 SOLD

03-22-2011, 01:02 PM	#7 (permalink)
Mr. Q Enthusiast Member Join Date: Dec 2009 Location: Texas Posts: 349 Drives: 09 MB 370z Rep Power: 15	Thanks for the replies. I think the UR is winning out on the decision.

05-09-2011, 09:26 AM	#8 (permalink)
RedBullRR Enthusiast Member Join Date: Oct 2010 Location: Suffolk Posts: 336 Drives: 2010 370Z Red Rep Power: 14	I have both Pullies. Stillen Crank and Under Drive. Was given to me by a friend. But skeptical about installing these units. Think I'm going to install the main crank for now. I dunno about changing belts and going with the UR Pullie. Zero dark likes this. __________________ 2010 Solid Red Z: Mods: Stillen G3 Intakes \| BC Coilovers \| H&R 20/25 Spacers \| Stillen Splitter \| Stillen LW Pullie TBI \| Red GTR Start \| LED Interior \| Kenwood Double Din

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
STILLEN lightweight crank pulley	u155282	Engine & Drivetrain	97	08-01-2011 09:33 PM
UR Lightweight Crank Pulley + Diablo Sports Trinity	>135I	Parts for sale (Private Classifieds)	11	06-20-2011 05:03 AM
AMS Lightweight Crank Pulley	Dustin@Z1	Z1 Motorsports	13	03-31-2010 01:26 PM
stillen lightweight crank pulley	black09Z	Engine & Drivetrain	20	04-25-2009 08:00 AM