Which lightweight crank pulley?

Mr. Q

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

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

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09 GT-R
12' 370Z 7AT HANDED DOWN
12'+13' 5.0 SOLD

XwChriswX

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

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Bonnie - Stage 2, Audio build coming this fall!
R.I.P. Abby 3/29/10 - 3/30/14

Ztoon

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

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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
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ChrisSlicks

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.

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Hotchkis ARB | Stillen CAI | Art Pipes | Berk CBE | Stillen AP Racing Brakes | AE Performance Oil Cooler | BC Racing ER Coilovers | Doran Control Arms

GZ3

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

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09 GT-R
12' 370Z 7AT HANDED DOWN
12'+13' 5.0 SOLD

Mr. Q

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

RedBullRR

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.

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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