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

Harmonic Balancer clearance

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Old Sep 22, 2019 | 05:45 PM
  #1  
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Default Harmonic Balancer clearance

Hi,
A bud of mine is swapping out the 350 in his (early) C4 and replacing it with a crate 383 (Stroker) non injected motor.
The clearance between the harmonic balancer and the front cross-member is only about 5 mm.

1/- Is this Okay? or
2/- How can he get more clearance? or
3/- Can he swap out the harmonic balancer for a thinner one? or
4/- Is there another solution?
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Old Sep 22, 2019 | 05:58 PM
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If car is running probably, the crossmember and engine aren't going to move. The C beam locates the transmission to the differential. Indirectly it locates the engine on the crossmember since the engine bolts directly to the transmission. If the belt runs true it's should be ok. If pulleys have belt not tracking in a straight line you will need to find out why.
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Old Sep 22, 2019 | 09:02 PM
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….. To be on the absolute safe side , he could run an aftermarket Damper like the ATI Super damper … Its easy to say that the engine/trans won't move but he's putting a stroker motor in for reasons other than having extra torque for hauling groceries … so , how much it'll rock and roll depends on the ultimate usage …..
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Old Sep 22, 2019 | 11:55 PM
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@Kevova Thanks. I will pass your comments on.
Appreciated.

Last edited by Topcat7; Sep 22, 2019 at 11:57 PM.
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Old Sep 22, 2019 | 11:56 PM
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@C409 Appreciated. I will pass on.

Last edited by Topcat7; Sep 22, 2019 at 11:57 PM.
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Old Sep 23, 2019 | 12:51 AM
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Is this 5 mm with new motor mounts? That's about what I have on my harmonic damper, and my motor mounts are not new. That's just enough to slide my belt into place. I doubt that even a hot 383 would move the engine that far!

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Old Sep 23, 2019 | 04:09 PM
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@Hot Rod Roy Thank you!
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Old Sep 24, 2019 | 04:13 PM
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I have a 383 in my 88. Running a 8" balancer, no clearance issue at all. Looks closer than it really is.
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