C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Damper Size and fitment

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Old Sep 18, 2014 | 12:34 AM
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Default Damper Size and fitment

Hey guys ,

i cant recall but what size harmonic damper can we fit in an early C4 engine compartment without notching the cross member ? I ran a Small 6.325" ATI on my past setups without any issues and i just upgraded to 7. 074" .. Will i run into fitment issue ?

Thanks
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Old Sep 18, 2014 | 06:27 AM
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Im pretty sure its about 7.5" or thereabouts,
i have about .75" clearance under my 6.6" (i can poke my finger between them)
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Old Sep 18, 2014 | 11:22 AM
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Hope it clears .. hate to notch and bang on it after the fresh coat of paint ..
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Old Sep 18, 2014 | 12:18 PM
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I just installed my ati hub the other night for a 7.5" damper which is supposed to be the stock diameter damper. Biggest problem was installing it, length of installers vs depth of counter bore of the hub and ended up destroying a china installer that was in my tool box for an emergency. Then there was the .0009-.0012 press fit that had to be honed out.
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Old Sep 18, 2014 | 03:23 PM
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Why do you want to run a larger balancer??? Wouldn't it be less hassle to just use the 6.750 diameter balancer to start with , then you know you won't have problems......Is there an advantage to running a larger balancer that I don't know about.???......WW
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Last edited by WW7; Sep 18, 2014 at 03:29 PM.
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Old Sep 18, 2014 | 05:25 PM
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1400 horsepower that's why .. That's the damper that ATI told be to go with for my application so that what i bought ..
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Old Sep 18, 2014 | 06:21 PM
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Originally Posted by red L98
1400 horsepower that's why ..
..Then it's time to break out the big hammer, or maybe you can get away with a grinder..........WW
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Old Sep 18, 2014 | 07:22 PM
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I don't see anything wrong with a smaller balancer except for timing marks. Anyone try a fluid damper while were on the subject. I have an L98 and am looking at doing the chain, gears, water pump and balancer since I have a leaking front seal.
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