Flywheel imbalance question

84LX89GT · 03-17-2002, 03:52 PM

The crank in my GT is slightly scored and i just need my engine to hold together for a year or so (it has only very slight scores on the #2 Main journal on crank). So anyways, i have a great looking, non-scored 302 crankshaft laying around that's out of a '95 or '96 F150 and was wondering does that crankshaft have the same imbalance as the 302 HO engine, will i be able to use it in my car? It has like 30k miles on it and also has great bearings i could use (i pulled apart my GT's engine for other reasons and found my bearings worn from crud in the oil). Thanks,

PKRWUD · 03-17-2002, 06:00 PM

All 302's built after 1979 have an imbalance that requires a balancer with a 32 (or 34, I don't recall exactly) ounce added balance weight, and a flywheel with a 50 ounce added balance weight. All 1979 and earlier 302's required a 28 ounce balance weight on both the balancer and the flywheel.

You would be better off if you could get the balancer and flywheel that were on the truck, but if that's not possible, just make sure you do have the correct ones.

Take care,
-Chris

84LX89GT · 03-17-2002, 11:40 PM

Thanks Chris,
I wasn't quite sure and i sure as hell wasn't going to take a chance and be wrong. Soon my GT will be back up and running better than ever (hopefully....cross my fingers).
Thanks again,

Rick

03-17-2002, 03:52 PM	#1
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	Flywheel imbalance question The crank in my GT is slightly scored and i just need my engine to hold together for a year or so (it has only very slight scores on the #2 Main journal on crank). So anyways, i have a great looking, non-scored 302 crankshaft laying around that's out of a '95 or '96 F150 and was wondering does that crankshaft have the same imbalance as the 302 HO engine, will i be able to use it in my car? It has like 30k miles on it and also has great bearings i could use (i pulled apart my GT's engine for other reasons and found my bearings worn from crud in the oil). Thanks, __________________ 2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock)

03-17-2002, 11:40 PM	#3
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	Thanks Chris, I wasn't quite sure and i sure as hell wasn't going to take a chance and be wrong. Soon my GT will be back up and running better than ever (hopefully....cross my fingers). Thanks again, Rick __________________ 2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock)

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03-17-2002, 06:00 PM	#2
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	All 302's built after 1979 have an imbalance that requires a balancer with a 32 (or 34, I don't recall exactly) ounce added balance weight, and a flywheel with a 50 ounce added balance weight. All 1979 and earlier 302's required a 28 ounce balance weight on both the balancer and the flywheel. You would be better off if you could get the balancer and flywheel that were on the truck, but if that's not possible, just make sure you do have the correct ones. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!