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Author Topic:   390"?
Dirt Maniac

Total posts: 171
posted January 07, 2005 04:37 AM  
I'm not a big engine guy, but what is a 390 cube s/b Chev? Is it a bored over 383?

Dirt Freak

Total posts: 493
posted January 07, 2005 06:21 AM  
I believe (in most cases) it is similar to the 383 but with a small amount of added stroke to the crank. So, 350 block with 400 style crank with added stroke, prolly around 3.875?? I am sure someone will run the numbers on it. We have several people here that run them.

The Joy of Six website

Dirt Forum Champ
Total posts: 578
posted January 07, 2005 10:40 AM  
another combo that size is a 400 block .020 over with a 3 5/8 stroke crank.


Dirt Freak

Total posts: 259
posted January 07, 2005 01:40 PM  
400 block 3 9/16 crank.

Dirt Maniac

Total posts: 171
posted January 08, 2005 12:07 AM  
Alright, what are the benefits of such a combo? Lots of torque, less rev's? Thanks for the replies.

Dirt Maniac

Total posts: 110
posted January 11, 2005 05:58 AM  
thought about doin one of those cube monsters for this season, comp products has a 3.875 forged crank that goes into a 350 block thats bored and clearanced to 383 and thats the one you wanted to know about.

using the same crank in a 400 with virgin cylinders gets you around 420 cubes

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