428 Flywheel balance
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428 Flywheel balance
So I'm building a 410 fe with the 428 crankshaft. I know that I need a balanced flywheel with the counter weight on it and have found some new online. I was just thinking and I'm curious if there is any specific position to mount the flywheel? Can I just throw it on, or does the weight have go be in a certain position in relation to the crank? Thanks.
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No matter what, it won't be perfect, and you'll want to get it balanced.
On a technical note, yes, the flywheel only goes on one way, you can't all the the bolts in if it's not position correctly.
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Oh okay, thank you. Guess I didn't take a good enough look at it haha. So are you guys saying it wouldn't be enough to just get a flywheel with the weight on it? I need to take it in with my engine to be balanced too? Would it cause any problems to just throw the weighted flywheel on? Has anyone done this? Thanks.
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You could (probably) wind up with a slight-to-mild vibration at certain RPMs, and who knows what all the piston/rod combos weigh, etc. You could just verify all the piston/rod weights are close and go from there, but if it were me, and I was putting together a 410 - which DOES change the balance compared to a 428, I would definitely get it balanced.
You need the flywheel, harmonic dampener, pistons/rods/rings and crankshaft, even the rod bearings, to give to the balance shop.
You need the flywheel, harmonic dampener, pistons/rods/rings and crankshaft, even the rod bearings, to give to the balance shop.
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Okay thanks... can they do it after I have it all put together? Because I've had the block machined already and the rods reconditioned with new bushings and all that. I haven't gotten much put in, but I'm starting to put the pistons in
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Balancing is done with the crank and rods and everything else out of the block.
They mount the crank on stands, simulate the weight of the rods/pistons with "bob-weights", bolt on the dampener and flywheel, and spin 'er up.
Sounds like you might be going without
They mount the crank on stands, simulate the weight of the rods/pistons with "bob-weights", bolt on the dampener and flywheel, and spin 'er up.
Sounds like you might be going without
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Ahhh. Dang. I'm really hoping someone will chime in and say "yeah I've just bolted on the balanced flywheel and was fine". I don't wanna have to pay extra money for it and take it apart, but I also don't want to ruin this engine
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It will be less expensive in the long run to do it right the first time.
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I know, I know. I appreciate the advice, thanks guys.
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Make sure when you buy the NEW wheel that it IS balanced for a 428. Some will just be generic FE(zero balanced) and will need balanced(by you) to work on a 428.
If it is a TRUE 428 wheel, then it should be able to be just bolted on. If everything else in the motor is stock, it should be within spec enough to not be a problem. It is always best to have things checked/balanced. Eliminated any problems after you get it running.
I bought a 428 almost 30 yrs ago, had a 390 flywheel on it. It vibrated about 2500 rpm. It would rattle the transmission loose from the bellhousing if you drove it for a few days. That is when I first found out about a 428 being EXTERNALLY balanced. Once I put a 428 wheel on it, it was smooth again.
If it is a TRUE 428 wheel, then it should be able to be just bolted on. If everything else in the motor is stock, it should be within spec enough to not be a problem. It is always best to have things checked/balanced. Eliminated any problems after you get it running.
I bought a 428 almost 30 yrs ago, had a 390 flywheel on it. It vibrated about 2500 rpm. It would rattle the transmission loose from the bellhousing if you drove it for a few days. That is when I first found out about a 428 being EXTERNALLY balanced. Once I put a 428 wheel on it, it was smooth again.
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Make sure when you buy the NEW wheel that it IS balanced for a 428. Some will just be generic FE(zero balanced) and will need balanced(by you) to work on a 428.
If it is a TRUE 428 wheel, then it should be able to be just bolted on. If everything else in the motor is stock, it should be within spec enough to not be a problem. It is always best to have things checked/balanced. Eliminated any problems after you get it running.
I bought a 428 almost 30 yrs ago, had a 390 flywheel on it. It vibrated about 2500 rpm. It would rattle the transmission loose from the bellhousing if you drove it for a few days. That is when I first found out about a 428 being EXTERNALLY balanced. Once I put a 428 wheel on it, it was smooth again.
If it is a TRUE 428 wheel, then it should be able to be just bolted on. If everything else in the motor is stock, it should be within spec enough to not be a problem. It is always best to have things checked/balanced. Eliminated any problems after you get it running.
I bought a 428 almost 30 yrs ago, had a 390 flywheel on it. It vibrated about 2500 rpm. It would rattle the transmission loose from the bellhousing if you drove it for a few days. That is when I first found out about a 428 being EXTERNALLY balanced. Once I put a 428 wheel on it, it was smooth again.
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And a 428 takes an 11.5 or 12 inch clutch right? And isn't it correct that when I put my 410 into my truck, I won't be able to use the 11 inch clutch from my 360 since the pressure plate has a different pattern?