match balance FW to Flexplate
Thread Starter
Melting Slicks
Joined: Oct 2000
Posts: 3,010
Likes: 1
From: Sweden/Stockholm
match balance FW to Flexplate
For 1991 vette...
Can you matchbalance a DM flywheel to a flexplate?
I have engine that is convertet from a auto to a 6spd ZF .
So I have no DM flywheel from that engine to use, only a flexplate.
And I have a DM flywheel from a donor car thats going on that auto engine..
I know that in theory you should be abel to just bolt the flywheel on, as the offset should be the same on all 1pc cranks. But better to be sure I guess..
Cheers
Can you matchbalance a DM flywheel to a flexplate?
I have engine that is convertet from a auto to a 6spd ZF .
So I have no DM flywheel from that engine to use, only a flexplate.
And I have a DM flywheel from a donor car thats going on that auto engine..
I know that in theory you should be abel to just bolt the flywheel on, as the offset should be the same on all 1pc cranks. But better to be sure I guess..
Cheers
Last edited by devilfish; Mar 9, 2017 at 05:03 PM.
Pro
Joined: Aug 2004
Posts: 549
Likes: 13
From: Richmond VA
I was in the same boat with my 94 when the DMF gave up. I had a shop match it to the DMF and had a bad vibration at about 3k rpm. Took the new flywheel and my old flex-plate and this time the balance was perfect, no vibration at all.
If you have the original flex-plate I would match balance the new SMF to it.
If using the DMF just install it. Worked well for me for several years until the DMF wore out.
If you have the original flex-plate I would match balance the new SMF to it.
If using the DMF just install it. Worked well for me for several years until the DMF wore out.
Last edited by blue94; Mar 9, 2017 at 04:49 PM.
Thread Starter
Melting Slicks
Joined: Oct 2000
Posts: 3,010
Likes: 1
From: Sweden/Stockholm
I was in the same boat with my 94 when the DMF gave up. I had a shop match it to the DMF and had a bad vibration at about 3k rpm. Took the new flywheel and my old flex-plate and this time the balance was perfect, no vibration at all.
If you have the original flex-plate I would match balance the new SMF to it.
If using the DMF just install it. Worked well for me for several years until the DMF wore out.
If you have the original flex-plate I would match balance the new SMF to it.
If using the DMF just install it. Worked well for me for several years until the DMF wore out.
So thats why I asked if I need to match balance this used DM flywheel to the flexplate that came with the -91.
But it would be great if I just could bolt it on, as the "offset" balance should be the same on all 1pc cranks..
But im not 100% sure
Thanks.
Last edited by devilfish; Mar 9, 2017 at 05:02 PM.
Le Mans Master
Joined: Jun 2009
Posts: 6,528
Likes: 752
From: South Dakota
I had a very bad vibration problem at 3k rpm and up with an aftermarket flywheel.
When I researched it, I found the L98/LT1/LT4 all use the same flywheel balance. I did not have a flywheel to match balance to. I put a L98 DM flywheel on my LT4 without doing any balance to it. It worked fine and I do not have any vibration.
I also had the aftermarket flywheel balanced so I could use them sometime. There is a value for the amount of flywheel imbalance that is used by the factory for balancing these motors. A good shop should know what amount that is.
I had Jim at PowerTorque systems do mine. He is very knowledgeable about the DM flywheels and C4 clutches and hydraulics. He is one of the only people who can remachine the face of the DM flywheel. He was very helpful in talking to me when I was figuring out what to do with mine. You might give him a call.
Good luck.
When I researched it, I found the L98/LT1/LT4 all use the same flywheel balance. I did not have a flywheel to match balance to. I put a L98 DM flywheel on my LT4 without doing any balance to it. It worked fine and I do not have any vibration.
I also had the aftermarket flywheel balanced so I could use them sometime. There is a value for the amount of flywheel imbalance that is used by the factory for balancing these motors. A good shop should know what amount that is.
I had Jim at PowerTorque systems do mine. He is very knowledgeable about the DM flywheels and C4 clutches and hydraulics. He is one of the only people who can remachine the face of the DM flywheel. He was very helpful in talking to me when I was figuring out what to do with mine. You might give him a call.
Good luck.
Last edited by QCVette; Mar 10, 2017 at 09:42 AM.
Thread Starter
Melting Slicks
Joined: Oct 2000
Posts: 3,010
Likes: 1
From: Sweden/Stockholm
I had a very bad vibration problem at 3k rpm and up with an aftermarket flywheel.
When I researched it, I found the L98/LT1/LT4 all use the same flywheel balance. I did not have a flywheel to match balance to. I put a L98 DM flywheel on my LT4 without doing any balance to it. It worked fine and I do not have any vibration.
I also had the aftermarket flywheel balanced so I could use them sometime. There is a value for the amount of flywheel imbalance that is used by the factory for balancing these motors. A good shop should know what amount that is.
I had Jim at PowerTorque systems do mine. He is very knowledgeable about the DM flywheels and C4 clutches and hydraulics. He is one of the only people who can remachine the face of the DM flywheel. He was very helpful in talking to me when I was figuring out what to do with mine. You might give him a call.
Good luck.
When I researched it, I found the L98/LT1/LT4 all use the same flywheel balance. I did not have a flywheel to match balance to. I put a L98 DM flywheel on my LT4 without doing any balance to it. It worked fine and I do not have any vibration.
I also had the aftermarket flywheel balanced so I could use them sometime. There is a value for the amount of flywheel imbalance that is used by the factory for balancing these motors. A good shop should know what amount that is.
I had Jim at PowerTorque systems do mine. He is very knowledgeable about the DM flywheels and C4 clutches and hydraulics. He is one of the only people who can remachine the face of the DM flywheel. He was very helpful in talking to me when I was figuring out what to do with mine. You might give him a call.
Good luck.
Yes, im planing to just install this used DMF, without match balance it to the flexplate. And keep my fingers crossed..
I should work, the DMF balance should be the same on all engines using 1pice cranks, If Im not totaly miss informed.
