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Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. [message #326320 is a reply to message #326271]

Fri, 24 November 2017 20:32

Ernest Dankert

Messages: 133
Registered: May 2007
Location: Ogden, New York

Karma:

Senior Member

Drilling the harmonic balancer to balance the engine will shift the rpm band the balancer is to operate. The crank will
have rpm ranges where it will wind and unwind (resonate) due to the firing order. The rotational mass is bonded in rubber
at the opposite end of the crank to counteract the effect. [On my 1977 Chev 350 the timing mark is aligned with the key
way.]

I will go so far as to say if your harmonic balancer is drilled to balance the rotating assembly it will shift the operating
rpm band to actually be detrimental.

Running the power unit on cruise control to the tuned region would hasten the point to where the timing alignment would shift.

I seem to recall some classroom discussion in my Dynamics class regarding crankshaft loading; unfortunately my notes are gone.

1977 Eleganza II
Ogden NY

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[Message index]

		[GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: BobDunahugh on Wed, 22 November 2017 18:01
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: Richard Denney on Wed, 22 November 2017 18:09
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: James Hupy on Wed, 22 November 2017 18:15
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: Matt Colie on Thu, 23 November 2017 08:16
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: Kosier on Thu, 23 November 2017 12:10
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: Larry on Thu, 23 November 2017 12:21
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: Ken Burton on Thu, 23 November 2017 11:21
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: BobDunahugh on Thu, 23 November 2017 19:39
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: USAussie on Thu, 23 November 2017 21:16
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: Richard Denney on Thu, 23 November 2017 22:38
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: emerystora on Thu, 23 November 2017 22:49
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: Kosier on Fri, 24 November 2017 14:15
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: emerystora on Fri, 24 November 2017 15:39
		[GMCnet] Fw: Did you know your timing mark can MOVE on Olds engines? I didn't. By: BobDunahugh on Fri, 24 November 2017 11:17
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: Ken Burton on Fri, 24 November 2017 02:47
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: JohnL455 on Fri, 24 November 2017 10:53
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: James Hupy on Fri, 24 November 2017 11:11
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: USAussie on Fri, 24 November 2017 19:05
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: Ken Henderson on Fri, 24 November 2017 19:19
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: James Hupy on Fri, 24 November 2017 19:28
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: Matt Colie on Fri, 24 November 2017 20:19
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: JohnL455 on Fri, 24 November 2017 12:48
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: James Hupy on Fri, 24 November 2017 19:11
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: USAussie on Fri, 24 November 2017 19:59
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: Ernest Dankert on Fri, 24 November 2017 20:32
		Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. By: James Hupy on Fri, 24 November 2017 20:38

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