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Author Topic:   Help
Scoot
Member
posted December 17, 2002 09:19 PM
3 part question, What makes a 421 and a 434? Also whats more dependable and easier to maintain for Super Stock. Only engine restriction is 500cfm 2 barrel carb. 3/8 mile med-high banked tracks. 355-360, 377, 383, 406, 421, 434 or larger? Trying not to spend alot. I have a 355 that I ran last year. Thought about building a 406. Considering the rotating assemblies are close to the same price. Also where's the best place to get rotating assemblies? I'm looking a RACE Engineering, they seem to have high quality parts.

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Scoot
Smith Racing Team
870-365-5989


jhon hollomon
Member
posted December 17, 2002 10:02 PM
I'm pretty sure they use offset ground crankshafts. From what I here they are pretty expensive but they put out a lot of power.As far as dependable goes, I prefer the 355's and 406's. I've ran both with a lot of success.A 383 is pretty economical and they put out good power too.


tilley88
Member
posted December 18, 2002 08:54 AM
421-3 7/8" stroke
434-4" stroke
406-best bang for your buck. A "cheap" 421 shortblock will set you back $1700-$2000 around here. A "cheap" 406 $1200-$1500.


sixwillwin
Member
posted December 18, 2002 12:36 PM
Tilley is correct on all points.


rico 08
Member
posted December 18, 2002 03:04 PM
scoot you may check with some of the major engine builders they may have some latemodel in house percentage motors that may be fine for what you want for a real bargain.


tilley88
Member
posted December 18, 2002 03:10 PM
Hey Rico, clue me in on this! What's the deal?


Scoot
Member
posted December 18, 2002 07:49 PM
Thanks for all the input guys. Yeah Rico can you give us a little more info on that?

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Scoot
Smith Racing Team
870-365-5989


teamstertom
Member
posted December 18, 2002 09:20 PM
Check out www.jrmotorsports.com for engine packages. I am in the process of getting my engine program in motion as I have my block at the machine shop now. My 30 over block is good to go,I had to shelf the 291 heads for 441s,but with liteweight pistons and Eagle rods my bottom end should be go to go. I am finding out there are alot of good deals on used parts out in the market now.


rico 08
Member
posted December 19, 2002 06:07 PM
some of the major engine builders that have done this in the past are russell baker racing engines,hatfield engines,both are in 4-state area.


Scoot
Member
posted December 19, 2002 09:16 PM
Ok guys what do you think about a 347 in a 360c.i. limit class? I had a guy say this would be the best choice, and that the guy that won the championship ran one. I had never heard of one until then.

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Scoot
Smith Racing Team
870-365-5989


tilley88
Member
posted December 19, 2002 09:47 PM
You gonna put a Ford in that Camaro?


Scoot
Member
posted December 19, 2002 09:52 PM
No, I believe he told me that was a 350 with a 327 crank?

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Scoot
Smith Racing Team
870-365-5989


dirtbuster
Member
posted December 19, 2002 10:02 PM
A 350 with a 327 crank makes a 327.
The 350 and 327 have the same bore so all that really changes is the stroke.
350=4" bore 3.48" stroke
327=4" bore 3.25" stroke

Maybe he meant 400 with a 327 crank. That would make a 347 or with a 30 over makes a more common 353. Would be a good high rev motor but they dont make a lot of torque because of the short stroke. You'd need to rev them higher and run more gear to make up for it, especially to keep up with the torque of a 406, 421, 434 etc.

[This message has been edited by dirtbuster (edited December 19, 2002).]

racer1030
Member
posted December 19, 2002 10:06 PM
350 with a 327 crank is a 327. A 4.120 bore with a327 crank would be a 347. You would have to use a Bowtie or aftermarket block.


racer1030
Member
posted December 19, 2002 10:07 PM
350 with a 327 crank is a 327. A 4.120 bore with a327 crank would be a 347. You would have to use a Bowtie or aftermarket block.


carscomefirst
Member
posted December 19, 2002 10:11 PM
OK thanks alot guys, I probably misunderstood him. If I ran that engine it would be in a 360 c.i. max class. If I run in this class I'll probably just stay with my 355. I wanted to get some other opinions on that motor. Thanks again.

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Scoot
Smith Racing Team
870-365-5989


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