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Author Topic:   engine question
charlie_two
Dirt Full Roller

Total posts: 53
posted December 13, 2001 07:22 PM
hey guys. never built a 6 inch rod motor. i am running stock 3.48 stroke, will i have to notch the block for clearance anywhere?? thanks
charlie

HENDRENS RACING ENGINES
Dirt Roller

Total posts: 5
posted December 13, 2001 09:16 PM
NOT AT ALL BILL

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HENDRENS RACING ENGINES BILL HENDREN

race8k
Dirt Forum Racer

Total posts: 98
posted December 14, 2001 12:53 PM
Bill, I havee afreind who built a 6" rod 406 with H beam rods. He had to clearence the block. Why?

istock59
Dirt Freak

Total posts: 237
posted December 14, 2001 12:59 PM
I know you asked Bill, but it's because with a 406 you're running a 3.75 stroke crank. With the longer rods (5.7 or 6.0) you have to clearance the block.

race8k
Dirt Forum Racer

Total posts: 98
posted December 14, 2001 04:15 PM
Normally you clearence the block when you have to go to a longer stroke.The rods shouln't make any difference because they are not coming down or out any further than what the block was designed for.

jammin
Dirt Administrator

Total posts: 5556
posted December 14, 2001 04:18 PM UIN: 16262997
The width of the H-Beam Rods have a larger OD radius than normal I-Beam Rods....I-beams are lighter too...when made out of basically the same material, i don't see an advantage with H-Beams

jammin

HENDRENS RACING ENGINES
Dirt Roller

Total posts: 5
posted December 14, 2001 09:35 PM
race8k: Check istock59's answer. With a 3.48 stroke you won't have any problems. Bill

race8k
Dirt Forum Racer

Total posts: 98
posted December 16, 2001 12:54 PM
You usually don't have a 3.48 stroke on a 406.This was a 400 shaft with 3.75 stroke.Put in a 400 block bored 30 over that came with a 3.75 stroke crankshaft.Did he have to clear the clock because of the O.D. of the h beam rods?Would you have to clearece the block with a set of stock 5.7 rod?

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