flywheels for strokers
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Cargo Master
Joined: Aug 2000
Posts: 2,931
Likes: 12
From: SW Michigan
flywheels for strokers
Guys, I have seen many posts claiming that you need a 410/428 flywheel if you are running that crank. Or that those flywheels are tough to find. Get that notion out of your brains. The 410/428 flywheels and flexplates are available new, you can get them in a couple of days, and they don't cost any more than any other normal FE wheel. And, the fact is, you DON"T need one. The flywheel you have now will work if you tell your machinist what you are doing when he balances your rotating assembly........you ARE having your engine balanced, aren't you ? DF
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Cargo Master
Joined: Aug 2000
Posts: 2,931
Likes: 12
From: SW Michigan
flywheels for strokers
It IS just as easy for flexplates. They are available new, and cost about 30$. I believe they are made by Pioneer. Or you can use a regular 390 flexplate and have your balance guy weld on the extra counterweight. Thats all Ford did when they made 410s and 428s, welded, a small curved piece of steel just inside of the ring gear to get the balance they wanted. Your machine shop can do the same thing for you. DF
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
flywheels for strokers
Let me check for clarification:
I ordered a 428 stroker short block from Flatlander Racing. The rotating assembly will be balanced. So , I should be able to use my 390 Flex Plate with no concerns, right?
Should I be looking at an upgrade flex-plate since this motor will be pushing 500 lb-ft of torque?
I ordered a 428 stroker short block from Flatlander Racing. The rotating assembly will be balanced. So , I should be able to use my 390 Flex Plate with no concerns, right?
Should I be looking at an upgrade flex-plate since this motor will be pushing 500 lb-ft of torque?
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Cargo Master
Joined: Aug 2000
Posts: 2,931
Likes: 12
From: SW Michigan
flywheels for strokers
It is very possible to balance a stroker engine 'in the pan' and thus allow the use of normal dampeners and flywheels. But I have grave reservations about Flatlanders ability to do this kind of work. The stock flexplate can handle the power, but you should seriously consider buying your pieces from someone else. DF
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
flywheels for strokers
They claim to be the biggest builder of FE engines in the country. Is this BS? They also claim to have been doing FE engines since there were FE engines.
Anybody else have a negative opinion of Flatlander Racing?
Anybody else have a negative opinion of Flatlander Racing?
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Cargo Master
Joined: Aug 2000
Posts: 2,931
Likes: 12
From: SW Michigan
flywheels for strokers
I think they are B.S. I never heard of them before someone asked me, on this site, about why Flat's was recommending cast badger pistons for a built up 428. Flats told the guy that the TRWs were no longer available. I checked with my supplier and found TRW L2303F and L2245F were both available overnight. And the custom piston makers can whittle out anything you want ! but apparently Flat's didn't know about them ? I'm not going to claim to be the most informed guy on the planet, but I've been into FEs since back in the mid 70s, never heard of any Flatlander shop.....they have an impressive web site- they were offering Scat cranks before Scat had even confessed to making Fe cranks ! I think they are totally bogus. But if someone has any experience with them, I'd love to hear about it. DF
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Senior User
Joined: Dec 2002
Posts: 173
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From: Montana
flywheels for strokers
I just bought a new flexplate from a clutch manufacuring co it cost $85.00 a 390 was about $40.00. I checked at NAPA and they wanted about $160. for 410/428 flexplate and about $40.00 for a 390. I called and talked to a professional ballancer friend of mine and he told me that it would be very expensive to try and ballance the assembly inside the oil pan
Senior User
Joined: Jan 2002
Posts: 314
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flywheels for strokers
If the SCAT cranks are suposed to be stock relacements, then you would indeed need the externally balanced 410/428 flywheel/flex plate and balancer. Balancing at the time the rest of the machine work is done is no big deal. But, balancing ' in the pan ' is purely a guessing game, as all the parts ( crank, balancer, and flywheel/ flex plate ) need to be assembled at the time the balance job is done. Keep in mind when building a 390 stroker, in effect you are building a 410 so the imbalance from the increased stroke is present.
Last edited by 54_5star; May 1, 2003 at 11:15 PM.
