Harmonic balancers - Team Camaro Tech
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post #1 of 8 (permalink) Old Nov 3rd, 09, 09:21 PM Thread Starter
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Sean
 
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Harmonic balancers

Can someone tell me the difference between a '67, '68, '69, and '70, 8" harmonic balancer for a 350 motor? Is there a difference in the way they are degreed? If you have a '70 balancer on a '67 motor, will the timing be right if you have a '70 timing chain cover? What about a '69 cover or a '67 cover with a '70 balancer?
Thanks,
Sean

1967 CAMARO SS/RS 350
4 SPD CONVERTIBLE
TRIPLE BLACK
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post #2 of 8 (permalink) Old Nov 3rd, 09, 10:00 PM
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Harvard
 
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Re: Harmonic balancers

I don't know about all small blocks for those years. But I do know that the 67-68 Z28 had a balancer with a different timing mark on them than the 69 Z28's did and they were not interchangeable.

1968 Z28 British Green, all original except CE 302 engine. Have original owners booklet and protect-o-plate.
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post #3 of 8 (permalink) Old Nov 4th, 09, 09:10 AM
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Tom
 
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Smile Re: Harmonic balancers

The timing degree location was changed in 1969. I am going by memory, so it might not be 100% accurate ! I believe they changed by 8. It is recommended that you do not mix timing covers and Harmonic balancers. If you "find" TDC on your No.1 cylinder with a piston stop, you can verify if your marks are correct for your timing tab.

69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau GTSII seats, 700R4 transmission, 12-bolt w/Eaton 4.11:1
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post #4 of 8 (permalink) Old Nov 4th, 09, 09:52 AM
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Re: Harmonic balancers

Or do that and wrap the dampener with a new timing tape.

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post #5 of 8 (permalink) Old Nov 4th, 09, 10:29 AM
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Fred
 
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Re: Harmonic balancers

Didn't GM increase the balancer diameter to 8" in '69?

One owner 69 Camaro,(yep, bought it new
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RS SS Hugger Orange, L88, 4:10's tru-tack posi, ducted hood, Endura, spoilers.
TH400 (CX) with Coan 8" converter, GV-OD, 8 track still on console and best et 10.495,
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+ MT Super Scavenger headers & 3" full exhaust with X pipe. 3700 lbs. with me in it.
1000cfm AED and HD Harold-Lunati SR, 725 lift with shaft rockers too.
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post #6 of 8 (permalink) Old Nov 4th, 09, 12:10 PM Thread Starter
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Sean
 
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Re: Harmonic balancers

Quote:
Originally Posted by Fred Ficarra View Post
Didn't GM increase the balancer diameter to 8" in '69?
No. The 67' and 68' 350's and 302's got an 8" balancer.
Sean

1967 CAMARO SS/RS 350
4 SPD CONVERTIBLE
TRIPLE BLACK
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post #7 of 8 (permalink) Old Nov 4th, 09, 01:01 PM
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Tom
 
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Smile Re: Harmonic balancers

Fred, I believe that more models of cars did get the larger balancer in '69. As noted there were some models that had the 8" earlier.

'69 was a pivotal year for Chevrolet with the Long water pump, different engine mounts, new accessory brackets with bolt holes in the ends of the heads etc.

69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau GTSII seats, 700R4 transmission, 12-bolt w/Eaton 4.11:1
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post #8 of 8 (permalink) Old Nov 4th, 09, 01:08 PM
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Fred
 
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Re: Harmonic balancers

Thanks men.
And we all know what happened because of the 'pivot'.

One owner 69 Camaro,(yep, bought it new
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RS SS Hugger Orange, L88, 4:10's tru-tack posi, ducted hood, Endura, spoilers.
TH400 (CX) with Coan 8" converter, GV-OD, 8 track still on console and best et 10.495,
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128.79mph 1.428 60'
All with 1960's stuff. (except tires and converter)
+ MT Super Scavenger headers & 3" full exhaust with X pipe. 3700 lbs. with me in it.
1000cfm AED and HD Harold-Lunati SR, 725 lift with shaft rockers too.
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