Anyone have minimum thickness specs for a GMC 270 flywheel? I've looked in both the 51 and 57 GMC Maintenance Manuals. No mention in either of resurfacing flywheels at all.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12 '52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
I've never seen specifications for anything like that, even in more modern vehicles. But flywheels are pretty thick and unless you're whittling it down to less than 1/4" thickness, I doubt it will make a difference.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
On some of the round track cars, we would routinely machine 1/8" or more off the clutch disc side of a small block Chevy V8 flywheel, then turn it around on the lathe and take a bunch off the engine side. That was done to lighten the rotating mass to allow the engine to accelerate quicker off the turns, and give faster compression braking at the end of the straightaway. I don't recall ever breaking one of those flywheels, even at 7K+ RPM. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
I don't know why I missed it, but the same paragraph is in the 1951 GMC Maintenance Manual.
Given that the is no spec for minimum thickness, the only thing to worry about is was there material ground off in the past.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12 '52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
