8_Hobby Posted February 20, 2011 Report Share Posted February 20, 2011 i wont to run a 71/4 clutch with the Quick Time Lightweight Flexplates but it dose not have the Balance weights will in be bad on the moter. Quote Link to comment Share on other sites More sharing options...
jwmbishop Posted February 20, 2011 Report Share Posted February 20, 2011 (edited) yes. positively horrible. Have you ever heard an electric motor with bad bearings? It makes that sound because the the shaft is allowed to "bounce" around within the axial load. If you use a internal flywheel on an an external crank - you will forcing the crank to do much the same. As your oil film bearing will silence it you won't hear it - until the babbit of the bearings is gone and it will sound more like knock knock knock. At that point your crank is gone as well. And even before damage is done the vibration will rob power - probably even enough to negate the gains you made with the lighter flywheel. Thats the only negative thing I hold against the one piece block/crank - they are almost ALL external balance which limits your selection of flywheel\flexplates. there are internal cranks made for them - but hang onto your wallet! they are usually twice or more the price of a quality external crank. Edited to add: if you are tearing down and replacing bearings every week you could probably see some benefit from using it without the risk. These flywheels are more for dragsters that don't have the same longevity issues we see in circle. Edited February 20, 2011 by jwmbishop Quote Link to comment Share on other sites More sharing options...
poorboy Posted February 20, 2011 Report Share Posted February 20, 2011 I will look and see if I can find one but I think there is a bolt on plate so you can use that flex plate with a 1 piece crank. Quote Link to comment Share on other sites More sharing options...
poorboy Posted February 20, 2011 Report Share Posted February 20, 2011 Check Speedway motors item #91615375-86. I would call and make sure that is the application but I think it is. Quote Link to comment Share on other sites More sharing options...
8_Hobby Posted February 20, 2011 Author Report Share Posted February 20, 2011 see i got the Quick Time one for the one piece main seal it dont have the weights. i am think about call a few trand shop and see if i can the the weights out on it. Quote Link to comment Share on other sites More sharing options...
poorboy Posted February 20, 2011 Report Share Posted February 20, 2011 This part is a bolt on weight check it out. Quote Link to comment Share on other sites More sharing options...
8_Hobby Posted February 20, 2011 Author Report Share Posted February 20, 2011 This part is a bolt on weight check it out. it will not work the bolt paterne is not the same as the newer moters. Quote Link to comment Share on other sites More sharing options...
4cylfordz Posted February 21, 2011 Report Share Posted February 21, 2011 option a: replace the crank with an old style and add a seal adapter plate. option b: pull the crank and rods and pistons and balancer and have the rotating assembly rebalanced for the non batwing flexplate or option c: search Item #: 200558924393 on eBay ( should be what your looking for but I have no experience with it) Quote Link to comment Share on other sites More sharing options...
jwmbishop Posted February 21, 2011 Report Share Posted February 21, 2011 If you use the adapter don't forget to accomodate the extra thickness when setting up your trans. Quote Link to comment Share on other sites More sharing options...
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