Harmonic Balancer for 383
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Team Owner
Joined: Jul 2004
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From: Hartford WI
Harmonic Balancer for 383
What balanced do I use? Internal balanced or external? Fluidamper? ATI TIA.
This is for a 1 piece rear main seal pan. There is an adapter to make it a 1 piece though.
This is for a 1 piece rear main seal pan. There is an adapter to make it a 1 piece though.
Le Mans Master
Joined: Dec 2002
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From: Seattle Area WA
Depends on your motor. The 2 or 1 piece seal is at the rear I don't believe has an impact on your balancer.
Go with a 6.75" smaller external if your motor is externally balanced so you can clear the front cross member. If you are internally balanced, get an internally balanced one.
Go with a 6.75" smaller external if your motor is externally balanced so you can clear the front cross member. If you are internally balanced, get an internally balanced one.
Race Director
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From: Overland Park Kansas
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Depends on your motor. The 2 or 1 piece seal is at the rear I don't believe has an impact on your balancer.
Go with a 6.75" smaller external if your motor is externally balanced so you can clear the front cross member. If you are internally balanced, get an internally balanced one.
Go with a 6.75" smaller external if your motor is externally balanced so you can clear the front cross member. If you are internally balanced, get an internally balanced one.
Aklim: I recommend the "Pro Race" brand, "Pro Stock" series though. Not too expensive but better than Pioneer Balancers that have had delamination issues.
For $10 more you can even buy one with a bolt-in weight (if you're unsure how the RA will balance). (Some light-weight ext-bal RAs can actually use a neutral balancer if the pistons are light enough.)
Le Mans Master
Joined: Aug 2000
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From: Australia
Check your crank specs;
many of the cheaper cranks like Eagle use a 400 crank core that is ext balance both ends
You mean neutral balance; all SBC are neutral at front except 400ci
many of the cheaper cranks like Eagle use a 400 crank core that is ext balance both ends
You mean neutral balance; all SBC are neutral at front except 400ci
Last edited by rodj; Jul 22, 2010 at 04:12 AM.
Race Director
Joined: Nov 2003
Posts: 12,221
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From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Aklim: I recommend the "Pro Race" brand, "Pro Stock" series though. Not too expensive but better than Pioneer Balancers that have had delamination issues.
For $10 more you can even buy one with a bolt-in weight (if you're unsure how the RA will balance). (Some light-weight ext-bal RAs can actually use a neutral balancer if the pistons are light enough.)
Scat ext balance cranks need a 400 balancer. They don't have a "neutral" nose model (I don't think). I bought a Scat9000. They said it was supposed to be neutral nose. It was not. Read their website if you've got one of those.
Eagle has an ext rear / int front crank -- so it depends on what you bought.
I don't know about Lunati or other brands.
Stock config is ext rear/int front but you could have bought anything.
Last edited by GREGGPENN; Jul 22, 2010 at 10:26 AM.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Sounds like a reasonable assumption...That would mean it should be int/int balance, right?
Just like my application, I couldn't be sure until it went for balancing. Because the Scat9000 series says it has a so-called lighter-[imbalanced] nose, I had trouble anticipating.
It turned out that heavy metal COULD have made mine internal balance on the nose if I wanted to add it.
Just like my application, I couldn't be sure until it went for balancing. Because the Scat9000 series says it has a so-called lighter-[imbalanced] nose, I had trouble anticipating.
It turned out that heavy metal COULD have made mine internal balance on the nose if I wanted to add it.
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Le Mans Master
Joined: Aug 2000
Posts: 8,838
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From: Australia
All the low end ( $150 ) Eagle strokers are 400 based
http://cgi.ebay.com/ebaymotors/Eagle...-/270607831673
You will see their notes state ;MUST use 400 balancer and flexplate
