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Lt383

Old 11-24-2018, 05:12 PM
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Lt383

Iím doing a 383 for a 97 Camaro.my question is what flywheel and balancer is used? Do you still use the 350 flywheel and balancer or do I need to buy ones for the 3.75 crank? In an old school small block you woul have to run a 400 flywheel and balancer for a 383,so just wanna make shur I get rite parts because I just took engine down to machine shop and my machinist wasnít shur either.let me kno thanks.
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Old 11-24-2018, 09:46 PM
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Re: Lt383

The manufacturer of your new crankshaft will have the most reliable information on this.
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Old 11-25-2018, 10:31 AM
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Re: Lt383

Assuming you are doing an LT1 build, if are using a 1-piece rear main seal crankshaft, you need a flywheel with a specific balance weight to compensate for the missing piece of the end flange on the crank that allows the rear main seal to be installed. The front harmonic damper/pulley (not a ďbalancerĒ) is neutral balanced.

See post #4 in this thread:

https://www.camaroz28.com/forums/3rd...6/#post6987414
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Old 11-25-2018, 10:42 AM
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Re: Lt383

Ok so, it’s lt1 based yes.it a used crank n rods i bought out of another lt383 set up... I was reading up on so other posts,and read that all 86 and up 1 peice cranks are neutral balance in the front and external in the rear,meaning the stock flexplate that’s weighted and the stock pulley should be right for application??? Correct
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Old 12-26-2018, 07:05 PM
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Re: Lt383

You can actually do it either way, when I built my forged 383 I had my machine shop internally balance my rotating assembly and flywheel and I'm using a Fluidampr as well. Or you can leave it factory balanced neutral balanced at the front and external balanced at the rear.

Last edited by 87Aerocoupe; 12-26-2018 at 10:04 PM.
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