IDIBRONCO
IDIBRONCO
Maybe they thought you're cute and were hoping for a kiss afterward?
Maybe, but I don't know how they'd see me over the phone.Maybe they thought you're cute and were hoping for a kiss afterward?
I don't know.I was just wondering if there was a benefit to one over the other and what made them different prices
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I don't know.
What I know is:
In theory the SMF flywheels between 6.9 and 7.3 have different balancing masses... but in practice, the difference doesn't seem to be big enough to matter.
Heck, the 7.3 turbo flywheels /definitely/ have a different balancing mass... but it's totally possible to run the wrong one despite all the warnings.
Justin @ R&D ran a turbo-flywheel on a non-turbo 7.3 engine for a while - this was the motor that made over 400HP before the connecting rods failed.
Mind that the imbalance did not snap the crank or shear the block or anything.
It's not recommended as you can get the right part cheaply enough, but I thought I'd point that out.
In my case, I got my flywheel expecting to have a 7.3 motor(it's a 92 truck!), but it turns out that some previous owner had swapped in a 6.9.
Didn't want to buy *another* set and have to wait around for parts, so the 7.3 setup went in.
When looking at parts, remember that:
1983-86 had 6.9s with 4-speed transmissions. These have a 1 1/16" spline and are all SMF flywheels.
1987 had 6.9s with either a 4-speed the same as the 86, or a 5-speed with a DMF flywheel. The 5-speed spline is 1 1/4"
1988-1992 are all 7.3 non-turbo blocks with 5-speeds, DMF and 1 1/4" spline.
1993 and 1994 are either 7.3 non turbo or 7.3 turbo block with different DMF(1994 also has the PS motors, "direct injection turbo")
If you've got a 6.9 and 5-speed then either:
1. 1987 stock DMF
2. 1987 smf replacement kit
3. 1988-92 SMF replacement, which might have a slight imbalance.
The SMF flywheels are going to be the same diameter, size, bolt pattern etc. with different imbalance.
I'm sure that you could take a SMF or DMF from a 6.9 and re-drill it for a 12" clutch plate and disk, because that's all that's different.
You just need to make sure that your disk has a 1 1/4" spline on it, and the disk type(smf/dmf) matches your flywheel. Pressure plate is going to be basically the same, though a stock 6.9 DMF plate uses 6 bolts and an 11" disk; 7.3 came with 8 bolts and either a 11 or 12" disk.
Confusing enough for you?