Flywheel to crankshaft alignment hole
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From: Sunshine Coast, Queensland, Australia
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you may have. always , ALWAYS put flywheel back in the same place it came off.
Race Director
Joined: Nov 2006
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From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
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Cruise-In VIII Veteran
one wouldn't think so. but if suddenly you have a vibration, always double check the last thing you did.
Thread Starter
Racer
Joined: Sep 2019
Posts: 349
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From: Spokane, WA
To close the loop on this question, I spoke with technical support at RAM. They said that because the crankshaft is zero balance and the flywheel is zero balanced, the flywheel can be bolted to the crankshaft in any of the six radial positions and it won't matter. Positioning only matters on externally balanced engines (i.e. 400).
Safety Car
Joined: May 2004
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From: los altos hills california
To close the loop on this question, I spoke with technical support at RAM. They said that because the crankshaft is zero balance and the flywheel is zero balanced, the flywheel can be bolted to the crankshaft in any of the six radial positions and it won't matter. Positioning only matters on externally balanced engines (i.e. 400).
Last edited by ignatz; Nov 30, 2020 at 04:01 PM.
Thread Starter
Racer
Joined: Sep 2019
Posts: 349
Likes: 44
From: Spokane, WA
I don't remember that it mattered how the flywheel bolted to the crank on my zero balanced motor, but I will say that when I bolted my pressure plate to the flywheel and omitted some guide dowels I got a significant vibration. Did your PP come with any additional holes for dowels?
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From: Golden Colorado
To close the loop on this question, I spoke with technical support at RAM. They said that because the crankshaft is zero balance and the flywheel is zero balanced, the flywheel can be bolted to the crankshaft in any of the six radial positions and it won't matter. Positioning only matters on externally balanced engines (i.e. 400).
Racer
Joined: Oct 2017
Posts: 312
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From: Henry county ohio
Zero balance engine, zero balance flywheel, and zero balance clutch ***'y can be mated together in any location.
That being said, if you take it back apart, it would be a good idea to mark the clutch and flywheel.
If you have a super duper high performance engine, then maybe you should have them all balanced together, but by the same token, if you have to replace the pressure plate or flywheel, you will, due to your sdhp engine, have to get everything re-balanced. That would entail tearing the motor back down and starting the balance over again.....
And definitely as recommended above, make sure you have the correct pp bolts
Good luck.
Jeff
Thread Starter
Racer
Joined: Sep 2019
Posts: 349
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From: Spokane, WA
i used the correct bolts for the application.
Racer
Joined: Oct 2017
Posts: 312
Likes: 64
From: Henry county ohio
If you left that dowel out, and assembled the flywheel to the crank, or shoved it into the crank hole with the backside the flywheel, you may very well have thrown the balance off. Especially if it is externally balanced, and the dowel was the locator.. it may be externally balanced.
Is it a 383 ?
Without specific information about the engine, it's all just speculation.
Good luck.
Jeff
Is it a 383 ?
Without specific information about the engine, it's all just speculation.
Good luck.
Jeff
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
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From: New Braunfels Texas
You have two threads going on this.....tough to keep continuation.
Fact is that ALL neutral balance cranks that come from the aftermarket are spun up without a balancer and flywheel. ALL flywheels and pressure plate/disc are spun up neutral......by the aftermarket. BUT how good it is balanced is strictly up to the person doing the job and the companies quality control. That said.....you can have a crappy flywheel, a crappy clutch or a crappy crank OR all three. You state in the other thread that it didn't vibrate when you got the car but now it does. Now I threw out a few ideas but they were just that, ideas.....you have changed the flywheel and clutch and now it vibrates.....you also state that you may have the dowel hole in the wrong spot. This may or may not effect your situation solely contingent on how well your components were manufactured.
But to answer your original question....no, it will not have any effect assuming it is all neutral balanced properly.
Jebby
Fact is that ALL neutral balance cranks that come from the aftermarket are spun up without a balancer and flywheel. ALL flywheels and pressure plate/disc are spun up neutral......by the aftermarket. BUT how good it is balanced is strictly up to the person doing the job and the companies quality control. That said.....you can have a crappy flywheel, a crappy clutch or a crappy crank OR all three. You state in the other thread that it didn't vibrate when you got the car but now it does. Now I threw out a few ideas but they were just that, ideas.....you have changed the flywheel and clutch and now it vibrates.....you also state that you may have the dowel hole in the wrong spot. This may or may not effect your situation solely contingent on how well your components were manufactured.
But to answer your original question....no, it will not have any effect assuming it is all neutral balanced properly.
Jebby