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Author Topic:   engines 383 or 377
rookie
Dirt Newbie

Total posts: 2
posted October 17, 2002 10:41 PM
i was told a 383 is a 400 block with a 350 crank and a 350 block with a 400 crank is a 377 is that true ? i am not sure

hughes
Dirt Maniac

Total posts: 141
posted October 18, 2002 06:40 AM
true that

ford5
Dirt Freak

Total posts: 298
posted October 18, 2002 07:24 AM
other way around

eborcim
Dirt Full Roller

Total posts: 46
posted October 18, 2002 12:49 PM
350 block + 400 crank = 383

400 block + 350 crank = 377

22Power
Dirt Roller

Total posts: 9
posted October 18, 2002 06:39 PM
true above me

Dixon
Dirt Full Roller

Total posts: 45
posted October 18, 2002 08:38 PM
Actually none of the above are true.

A 377 is a 350 (standard 4.00" bore) with a 400 (longer stroke crank 3.75" versus 3.48"). A 383 is a 350 bored .030 over with a 400 crank. The standard bore of a 400 block is 4.125", and putting a 350 crank in will result in approx. 373 cubic inches.

Just remember that the 3.75" crank is externally balanced, and some tracks may notice weights on the flywheel or harmonic dampener.

Dixon

r19v
Dirt Roller

Total posts: 19
posted October 18, 2002 10:01 PM
Not trying to start anything here, but the engine normally referred to as a 377 (around here anyway)is a 400 block bored .030 oversize (4.155), with a 350 crankshaft, 3.48 stroke. CID = 377.52

tilley88
Dirt Freak

Total posts: 353
posted October 19, 2002 01:28 AM
If you get a BHJ 6.25" externally balanced balancer, that will eliminate the big "balancer" problem!

racerss10
Dirt Roller

Total posts: 6
posted October 19, 2002 07:32 PM
where would you get that balancer?

tilley88
Dirt Freak

Total posts: 353
posted October 20, 2002 11:56 PM
www.ardperformanceproducts.com or 1(800)436-2233. BHJ225-$109.95. Very nice piece!

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