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Case Tractors Discussion Forum
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Re: 451 vs 504 crank strength

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Die Hard Case

11-07-2012 15:39:18
75.105.91.148



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Thanks guys this is for a pulling tractor. The tractor already dynos out at over 300 with the 451 but I plan on doing more exstensive engine work to get to the 600hp range and I was just worried about the smaller crank taking the extra rpms and heat. So if I find a good crank out of a 15 26,2590 or 4690 it will go right in my block without any machining the block? I would just like to do this the right way the first time. Thanks Jason

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Thad

11-07-2012 16:14:30
207.119.192.133



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 Re: 451 vs 504 crank strength in reply to Die Hard Case, 11-07-2012 15:39:18  
No a large journal crank will not fit your block. Thats what makes them stronger is the larger journals. You just need to find a complete 504 from the models you just posted. This will give you the later screw in injector heads also. Your smaller crank has 2.75 rod journals and 3 inch mains. The larger crank is 3 inch rod and 3.5 mains. Thad



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