STILLEN lightweight crank pulley

BlueR32 · 04-21-2009, 11:33 AM

i'd hesitate to look at a picture of the crank pulley to decide if it is a harmonic damper.

the presence of elastomer or rubber on the pulley does not necessarily mean that it is required for torsional damping. it is common to have such on the crank pulley just for n/v/h.

to be a torsional damper, the pulley would have to have two rings whose movements are somehow isolated from each other, either by material or by springs. another format could be a viscous fluid in a circumferential cavity within the pulley.

stillen has looked at the pulley, and has said the configuration is not that of a damper. if there is doubt as to his expertise, then the only thing to do is to take one off and examine it in cross section.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Lightweight flywheels and SyncroRev Match	semtex	Engine & Drivetrain	19	01-25-2015 12:55 PM
Stillen Headers on 370z	Funky370z	Intake/Exhaust	72	04-07-2009 11:38 AM
Welcome STILLEN	AK370Z	STILLEN	10	02-03-2009 03:19 PM
Stillen Intake for VQ37VHR	vdcoff	Intake/Exhaust	7	01-25-2009 04:27 PM
Nissan 370Z on Display @ Stillen on 11/18	Slidefox	Nissan 370Z General Discussions	4	11-13-2008 08:41 PM

04-21-2009, 11:33 AM	#11 (permalink)
BlueR32 Base Member Join Date: Mar 2009 Location: Alabama Posts: 20 Drives: 2004 VW R32 Rep Power: 205	i'd hesitate to look at a picture of the crank pulley to decide if it is a harmonic damper. the presence of elastomer or rubber on the pulley does not necessarily mean that it is required for torsional damping. it is common to have such on the crank pulley just for n/v/h. to be a torsional damper, the pulley would have to have two rings whose movements are somehow isolated from each other, either by material or by springs. another format could be a viscous fluid in a circumferential cavity within the pulley. stillen has looked at the pulley, and has said the configuration is not that of a damper. if there is doubt as to his expertise, then the only thing to do is to take one off and examine it in cross section.