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Harmonic Balancer for 327 vs 350?

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Harmonic Balancer for 327 vs 350?

Posted: 10/4/09 5:09amMessage 1 of 7
s
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Jacksonville, FL - USA
Joined: 8/28/2007
Posts: 44
Vette(s): 1968 convertable 327 300hp All numbers matching, rally red with black interior. A/C, power windows, power brakes. Tremic 5speed
Hi Guys,

Can anyone tell me if a stock type balancer for a 327 ci base engine is different than a 350ci base engine.  I bought a new balancer and the timing at TDC is off 5 degrees.  The supply house says it should be right for my car but as far as I can tell its not.
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Harmonic Balancer for 327 vs 350?

Posted: 10/4/09 5:43amMessage 2 of 7
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HOWELL, NJ - USA
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You could use it and adjust your timing readings to compensate for the builtin 5 degrees on the balancer. For example, if your engine calls for timing at 4 degrees BTDC, I would time it to 9 BTDC to getthe 4 degrees on the motor...

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Harmonic Balancer for 327 vs 350?

Posted: 10/4/09 8:25amMessage 3 of 7
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Charlotte, NC - USA
Joined: 2/4/2008
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Vette(s): 1969 Custom Modified, Hooker Header Side Pipes, 12 to 1 compression ratio, 355 CID,4 speed close ratio with hurst shifter, 370 rear, Recaro interior, Tilt hood, Hugger Orange and Black.

They should be the same between a 327 and 350. Are you sure the outter ring on your old balancer has not slipped with age? Yhis had been the case with a couple of my older engines - just a thought.

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Harmonic Balancer for 327 vs 350?

Posted: 10/5/09 6:38pmMessage 4 of 7
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Jacksonville, FL - USA
Joined: 8/28/2007
Posts: 44
Vette(s): 1968 convertable 327 300hp All numbers matching, rally red with black interior. A/C, power windows, power brakes. Tremic 5speed
I checked top dead center while the engine was pulled out of the car.  The old balancer was dead on but I'm replacing it because its leaking and the rubber looks worn out.
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Harmonic Balancer for 327 vs 350?

Posted: 10/30/09 4:20amMessage 5 of 7
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Jacksonville, FL - USA
Joined: 8/28/2007
Posts: 44
Vette(s): 1968 convertable 327 300hp All numbers matching, rally red with black interior. A/C, power windows, power brakes. Tremic 5speed
I guess the new balancer was incorrectly indexed? Confused or when I was checking the old one I was doing something wrong.
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Harmonic Balancer for 327 vs 350?

Posted: 10/30/09 4:55amMessage 6 of 7
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Duncanville, TX - USA
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Are the two balancers the same diameter? (silly question, I know, but...)
Are they the same thickness, and same basic configuration?
If they are the same, dimensionally, the newer balancer may be improperly assembled, or it may be designed for an engine with the timing pointer in a different location.

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Harmonic Balancer for 327 vs 350?

Posted: 11/2/09 9:41amMessage 7 of 7
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Mounds View, MN - USA
Joined: 5/24/2007
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Vette(s): 70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe
Different years of small blocks had the timing pointers in different locations, so you probably just got a balancer that was not compatible with your pointer.

Larry
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