Visit The Dirt Forum for More Information

Author Topic:   what stroke of crank to use
motorsport 18
Dirt Full Roller

Total posts: 70
posted November 30, 2002 03:47 PM
i have a 400 block and 6'rods what stroke do i need to make a 383 or what do you suggest is the best way to go its going to be a mod motor

Dirt Freak

Total posts: 353
posted November 30, 2002 04:11 PM
Build a long rod 406. You'll need a 350 block to go with that 400 crank to make a 383, the other way around to make a 377. Wish I had a 406, more bang for your buck!

Earl Parker II
Dirt Full Roller

Total posts: 39
posted November 30, 2002 04:12 PM
You might want to go to and download the Engine Analysis v. 2.0 calculator. If nothing else it will eliminate a lot of math for you.

Earl Parker II

Dirt Maniac

Total posts: 135
posted December 01, 2002 11:07 AM
Very informative site. Especially interesting was the moving of the sparkplug, and the explanation of the free-rev miss. Much good info!

Back to the Archives