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Author Topic:   Double Humped 406?
OKC9
Dirt Full Roller

Total posts: 52
posted December 06, 2004 12:37 PM  
We've been offered a 509 short block bored .030 over with flat top speed pros, and have a good set of 291 double humps. Has anyone tried this combination in a modified, and how did you like it?

chomme
Dirt Freak

Total posts: 300
posted December 06, 2004 12:49 PM  
Chomme,
Did you put them on a flat top 406? That seems like a alot of hp.

chomme
Dirt Freak

Total posts: 300
posted December 06, 2004 04:53 PM  
Should be fine for a mod, keep rpms under 6800.

Thats more than my engine machinest has in his mod almost all the time and he won 22 races last year, and sold 11 motors to the claim.

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