Quote:
Originally Posted by bennett
I have an 85 300d turbo motor with low miles and it came to me without a flywheel on it. I see no witness marks etc. Have no idea where they are or if needed. I am planning a manual 4speed trans conversion.
So I am planning to use a 240d flywheel and have a Chevy flywheel mated to it.
as pictured below.
My 1st question is.. Do I need to zero balance the new 240/Chevy flywheel and if so - Why? I don't mind doing it , I just want to know why. I found many balance it or don't worry about it post's. I am confused.
2nd. Since my flywheel will weigh more does that effect the front balancer?
I am going the bell housing adapter route instead of the trans adapter.
fwiw.. in the second to last pic you can see the chevy holes are larger but close to the benz configuration. I may just try to redrill
a balance Chevy flywheel to benz but can't find one heavy enough. 40 lbs iirc.
These are not pics of my setup but from another conversion done elsewhere. I just want to avoid a big virbrating problem.
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Do you mean you're replacing the plate on the back of th engine that the tranny & starter bolt up to? Or are you trying to make an adapter to make the bellhousing fit the stock plate on the back of the engine?
EDIT: Nevermind - I followed your 4x4 labs link and see what you're trying to duplicate. BTW, others who have done the same with the Jeep AX-15 (including adapting the AX-15 flywheel) have reported no vibration issues. A flywheel suitable for a 6 or 8 cylinder is plenty heavy enough. IIRC the 240D flywheel is only 24 lbs and the 300D manual tranny flywheel is 34 lbs. One theory about why virtually all 240D 4-speed swaps into the 300D turbos have vibration issues is that the flywheel isn't heavy enough. The fact that neither the 40 lb flywheel from a 6 or 8 cylinder or the 38 lb flywheel from a 300D have vibration issues, but the lighter flywheel from the 240D almost always does, seems to support this theory.
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1984 300 Coupe TurboDiesel
Silver blue paint over navy blue interior
2nd owner & 2nd engine in an otherwise
99% original unmolested car
~210k miles on the clock
1986 Ford F250 4x4 Supercab
Charcoal & blue two tone paint over burgundy interior
Banks turbo, DRW, ZF-5 & SMF conversion
152k on the clock - actual mileage unknown
Last edited by rcounts; 01-29-2010 at 03:04 PM.
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