SMF/DMF balance questions
09-30-2010, 08:42 PM
#1
Le Mans Master
Thread Starter
SMF/DMF balance questions
Hi all,
I just yanked the clutch and DMF from my '94 LT1 car, and will be installing a spank-new Spec heavyweight steel SMF and Stage 2 clutch. The question of balance arises now. A few things I'd like to know:
1. Is the LTx DMF neutrally balanced?
2. Has anyone had a problem show up with out-of-the-box balance on a Spec heavyweight steel SMF? In other words:
2a. Has anyone had the DMF and Spec heavyweight SMF match-balanced before installing? If so, was there a mis-match that required any adjustments to the SMF?
2b. Has anyone just bolted in a Spec heavyweight SMF and Stage 2 clutch without checking the balance on it prior to the install? If so, did it go smoothly, or did any balance issues show up after the install?
Many thanks in advance.
Live well,
SJW
I just yanked the clutch and DMF from my '94 LT1 car, and will be installing a spank-new Spec heavyweight steel SMF and Stage 2 clutch. The question of balance arises now. A few things I'd like to know:
1. Is the LTx DMF neutrally balanced?
2. Has anyone had a problem show up with out-of-the-box balance on a Spec heavyweight steel SMF? In other words:
2a. Has anyone had the DMF and Spec heavyweight SMF match-balanced before installing? If so, was there a mis-match that required any adjustments to the SMF?
2b. Has anyone just bolted in a Spec heavyweight SMF and Stage 2 clutch without checking the balance on it prior to the install? If so, did it go smoothly, or did any balance issues show up after the install?
Many thanks in advance.
Live well,
SJW
09-30-2010, 08:46 PM
#2
Le Mans Master
Thread Starter
Oh, and one additional question for those of you who carried the DMF and SMF to a shop to have balance checked:
Did you take the pressure plate, too, or just the flywheels?
TIA.
Live well,
SJW
Did you take the pressure plate, too, or just the flywheels?
TIA.
Live well,
SJW
09-30-2010, 09:10 PM
#3
Le Mans Master
Member Since: Aug 2000
Location: Sydney Australia
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DMF only came on 1 pce seal engines which are all external balance at rear.
If you look at the engine side of your DMF it has a weight cast on it
http://forums.corvetteforum.com/1569080592-post18.html
One would assume a aftermarket FW for a 1 pce seal engine should have the same factory balance setup as that FW will not bolt to a 2 pce seal crank
If you look at the engine side of your DMF it has a weight cast on it
http://forums.corvetteforum.com/1569080592-post18.html
One would assume a aftermarket FW for a 1 pce seal engine should have the same factory balance setup as that FW will not bolt to a 2 pce seal crank
Last edited by rodj; 09-30-2010 at 09:22 PM.
09-30-2010, 10:00 PM
#4
Le Mans Master
Thread Starter
DMF only came on 1 pce seal engines which are all external balance at rear.
If you look at the engine side of your DMF it has a weight cast on it
http://forums.corvetteforum.com/1569080592-post18.html
One would assume a aftermarket FW for a 1 pce seal engine should have the same factory balance setup as that FW will not bolt to a 2 pce seal crank
If you look at the engine side of your DMF it has a weight cast on it
http://forums.corvetteforum.com/1569080592-post18.html
One would assume a aftermarket FW for a 1 pce seal engine should have the same factory balance setup as that FW will not bolt to a 2 pce seal crank
Live well,
SJW
10-01-2010, 11:36 PM
#5
Race Director
Member Since: Sep 2000
Location: The Top of Utah
Posts: 17,298
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22 Posts
DMF only came on 1 pce seal engines which are all external balance at rear.
If you look at the engine side of your DMF it has a weight cast on it
http://forums.corvetteforum.com/1569080592-post18.html
One would assume a aftermarket FW for a 1 pce seal engine should have the same factory balance setup as that FW will not bolt to a 2 pce seal crank
If you look at the engine side of your DMF it has a weight cast on it
http://forums.corvetteforum.com/1569080592-post18.html
One would assume a aftermarket FW for a 1 pce seal engine should have the same factory balance setup as that FW will not bolt to a 2 pce seal crank
RACE ON!!!
10-02-2010, 11:38 PM
#6
Le Mans Master
Thread Starter
Thanks for the replies, guys. Muchly appreciated. I decided to hedge my bets, and dropped the old DMF and new SMF at the House of Balance on Friday, to have them checked for balance match, and to match-balance as required. Might well prove to have been unnecessary, but yanking the flywheel out of a ZF6 C4 on a Kwiklift is enough of a chore that I'd be very unhappy if I got it all back together and had a vibration issue, so I decided to err on the side of caution in this case. Here's hoping I'll not have to tear into it again anytime soon.
Live well,
SJW
Live well,
SJW
