I have an 1989 IROC with the 305 TPI. I want to replace the harmonic balancer. Last night, I called Summit Racing to find out what they have. The guy I talked to recommended a Streetdampr or a Fluidampr. But he told me I had to measure my existing one to find out what size damper I have now. Before I crawl under my car to try to measure this thing, does anyone know what size harmonic damper came on this car?

Also, the Fluidampr is more expensive than the Streetdampr. Is there any reason I should spend the extra money on the Fluidampr?

Thanks.

Paul

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'89 IROC-Z,
305 TPI, Auto,
T-Tops, 3.73s
Borla cat-back

[This message has been edited by IROC'N (edited July 25, 2001).]

 

Let me go measure it...brb...

My 87 LB9s balancer is 6.5" in diameter.

Probably not.

edit.. thats right, its 6.75 not 6.5

[This message has been edited by rezinn (edited July 25, 2001).]

 

I just measured my old one, its 6 3/4"

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Rob
'86 TA 305 TPI
Gutted MAF, Ported Plenum
TB Bypass, Home made Cold Air Intake,
Edelbrock T.E.S.

 

they are 6.75 ", both the 305 and 350 have the 6.75".

James

 

Okay. Thanks everyone!

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'89 IROC-Z,
305 TPI, Auto,
T-Tops, 3.73s
Borla cat-back