I just had the Spec III put in my car using the stock flywheel. The flywheel should be zero balanced and the rotating assembly balanced to itself. I think that bolt in the back of the Flywheel may hit the block anyways. He indicated that 4 cylinder cranks usually are fine and don't need balancing. Also replaced axles (Leobro's) No problems of this type before engine drop. 4 0 obj With the combination of materials, Chromoly has an outstanding strength to weight ratio and is stronger and harder than standard 1020 steel or other aluminum flywheels on the market. Broken cranks, cracked bell housings, are all a result of out of balance. As it pertains to machining and manufacturing tolerance, parallelism and concentricity are the important measurement standards. Jenkins/Fidanza:It is highly recommended to balance the flywheel and clutch assembly together before installing them into the vehicle. David Norton, SPEC Clutch. From the factory, your '82 to '95 Mustangs came with a 10 inch clutch. Check with the vehicle manufacturer for testing specifications. The flywheel also balances the engine as it is specifically weighted the engines crankshaft, and most importantly, the flywheel connects the engine to the transmission through the clutch in order to provide power to the wheels. Chromoly flywheels are an excellent choice for any performance or stock build. The two main types are those with a replaceable friction surface allowing for easy replacement and rebuild, and those that are more conventional having a friction area that can be resurfaced within factory specifications. So the flywheel, clutch, and pressure plate were all replaced. I have always felt balance is a good way to spend money on these engines. On top of that, considering how long it takes to change out a clutch and flywheel set, it's probably a good idea to do everything the correct way the first time around. The SFI Foundation, Inc. (SFI) is a non-profit organization established to issue and administer standards for the quality assurance of specialty performance and racing equipment. This is done by adding weight to the outer extremities of the cover. Flywheels - Action Clutch Balancing a clutch assembly is crucial to its ability to properly function, and it all starts with a balanced flywheel. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Factory flywheel was cast iron, and six bolt pattern, and also 50 ounce imbalance. My bits are ready for balancingthe second engine needs a SPI clutch (an MPI clutch was sent) and crank lapped then both can go off together. <>>> clutch balance - BMW Motorcycle Owners of America When spinning the slowly the posts will rock side to side. Due to the loss in mass, these tend to require changes in your driving habits which can be a bit irritating for daily use. This is known as "Detroit Balance". "the disc can land anywhere" - I shoulda thought of that!
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