Author Topic: z28 harmonic balancer?  (Read 3156 times)

jonboy1216

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z28 harmonic balancer?
« on: February 20, 2010, 12:36:31 AM »
does a 68 MO 3817173 have the cooling fins on the back of the balancer? i have seen NOS ones both ways just dont which one is right

1968 Z28

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Re: z28 harmonic balancer?
« Reply #1 on: February 20, 2010, 02:19:50 AM »
My original '68 balancer does not have the fins....Looks like the finned ones were on the earlier Corvettes.
Jerry G.

Z28-1968-07C-Norwood
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2nd. Owner, 38,000 miles

68Zproject

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Re: z28 harmonic balancer?
« Reply #2 on: February 20, 2010, 03:58:19 AM »
My original '68 balancer does not have the fins....Looks like the finned ones were on the earlier Corvettes.

Mine either.
68Z28

1968RSZ28

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Re: z28 harmonic balancer?
« Reply #3 on: February 20, 2010, 06:31:25 AM »
My '68 Z/28 harmonic balancer is "fin-less" too.

Paul

jonboy1216

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Re: z28 harmonic balancer?
« Reply #4 on: February 21, 2010, 05:38:10 AM »
thanks guys for the info

GaryL

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Re: z28 harmonic balancer?
« Reply #5 on: March 05, 2010, 03:47:11 AM »
What would the fins be cooling?
Gary

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JohnZ

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Re: z28 harmonic balancer?
« Reply #6 on: March 05, 2010, 03:50:52 PM »
What would the fins be cooling?

Most likely someone thought it would reduce the temperature of the hub, thereby improving the durability of the elastomer material between the hub O.D. and the inertia ring I.D.; warranty and test data probably didn't support the theory, and the fins were removed. Most optional '62-'67 Corvette engines used the 8" balancer with the fins.
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Jerry@CHP

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Re: z28 harmonic balancer?
« Reply #7 on: March 06, 2010, 01:37:21 AM »
Have never seen any original 302 with finned balancer.

Jerry

MyRed67

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Re: z28 harmonic balancer?
« Reply #8 on: March 10, 2010, 03:34:44 AM »
What Balancer did the'67 - 302 use?  Was it the same as the 350?
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Jerry@CHP

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Re: z28 harmonic balancer?
« Reply #9 on: March 10, 2010, 04:58:19 AM »
350 8" balancer is thinner.

Jerry

SSMUNDY

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Re: z28 harmonic balancer?
« Reply #10 on: March 14, 2010, 04:28:53 AM »
Can anyone tell me what the thickness is of the '67  8" balancer? I need to know the distance between the face of the balancer where the pulley bolts on, and the back side of the hub where it meets the crank?
Thanks,
Sean