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Author Topic:   434 stroker
Dirt Maniac

Total posts: 143
posted February 11, 2005 11:21 PM  
I'm curios about an engine combo I overheard someone at our track talking about. Our rules state "any cubic inch,stock block only". Can you build a 434 in a stock 400 block? I read in a John Lingenfelter book that you need a tall deck block. Is this true? Isn,t there a clearance problem with the cam and oil pan rails? Thanks for help.

Dirt Freak

Total posts: 226
posted February 12, 2005 01:53 AM  
I am pretty sure that you can make a 434 out of a 400 block, just lots of clearancing to do... and costs some money, probably would be better off going with a dart block with all the trouble and money


Dirt Freak

Total posts: 259
posted February 12, 2005 09:15 AM  
Not a problem.Use a good displayed cap block.Lunati pro mod rods.They need alot less grinding for clearence and are some of the best rods for the money.Turn around 7200 rpms.Ran one for a few years and sold it to a freind.

dan murray
Dirt Full Roller

Total posts: 34
posted March 10, 2005 11:34 PM  
You can even go 441 cubic inches with a 400 block.

Dirt Forum Champ
Total posts: 796
posted March 11, 2005 06:22 AM  
4.155" (.030 over, 400 block) and 4.00" stroke crank, makes 434 cubic inches. 4.125" (stk bore 400) x 4.00" stroke makes a 430, a popular LM combo on big tracks.

Its referred to as a square motor, stroke and bore close to the same measurement. Usually when engines get in this range they get mega torquey.

Alot of street stock guys loves this combo around here.

Also like Racer111 said, there is alot of clearancing to be done. Use good parts as well, this much stroke really stresses a stk blk 400.

[This message has been edited by Kromulous (edited March 11, 2005).]

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