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Author Topic:   SB Chevy 400 fly wheel question
02 Blewbyu
Dirt Full Roller

Total posts: 48
posted February 18, 2005 02:16 AM  
can a flywheel from a 454 be interchanged with a small block 400? Also I have seen a plate that allows a 400/454 to use a 350 flexplate/flywheel. I am thinking that is the wrong way to go but kind of interested if anyone has tried it.

hoosierdaddy48
Dirt Maniac

Total posts: 107
posted February 18, 2005 04:55 AM  
we allways ran the balance plate on our 400's using the 350 plate, no problems

Driver67R
Dirt Roller

Total posts: 21
posted February 19, 2005 01:37 AM  
you have to use a 400 flywheel if you have a 400 crank in it if you have a 350 crank you use a 350 flywheel.

pit_boss
Dirt Forum Racer

Total posts: 80
posted February 19, 2005 08:25 AM  
Good answer there Driver67R, but what 02 B. was asking was, Does a 454 flywheel/flexplate interchange with a 400,as I was wondering the same thing .

lugnut38
Dirt Newbie

Total posts: 2
posted February 23, 2005 06:11 PM  
NO IT DOES OT INTERCHANGE I USE A 350 FLYWHEEL WITH THE 400 BALLANCE PLATE FOR THE LAST 5 YEARS WITH NO PROBLEMS

STREET16
Dirt Maniac

Total posts: 158
posted February 23, 2005 07:18 PM  
I went the opposite way and used a 400 flywheel on a 454 in a pick-up without any problems. So, it would stand to reason that a 454 flywheel would work on a 400. As far as the plate, it would allow you to use a 350 flywheel on a 400 or 454. The plate compensates for the weight to balance the flywheel only, you still have to use the harmonic balancer for the 400.

[This message has been edited by STREET16 (edited February 23, 2005).]

BIGDADDYBOZ
Dirt Freak

Total posts: 466
posted February 23, 2005 07:22 PM  
454's and 400's are balanced in the same manner. I have used balance plates on 454's and 400's both with 350 flywheels. So Yes a 454 and 400 flywheel will interchange.

nailngoracing
Dirt Maniac

Total posts: 170
posted February 23, 2005 08:56 PM  
so what happens if you use the 454 or 400 flywheel on a 350?

i have been running a big block flywheel on my 350's....

BIGDADDYBOZ
Dirt Freak

Total posts: 466
posted February 23, 2005 09:03 PM  
I had a friend put a 400 flywheel on a 350 one time and it had a vibration.

nailngoracing
Dirt Maniac

Total posts: 170
posted February 24, 2005 03:10 PM  
Did SHE like it?

    

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