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Tractor Pulling Discussion Forum

camshaft work.

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10-04-2006 18:37:31

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I have a 1944 JD A. It is bored out .125 head has been shaved about .080. Manifold and head ports
have been opened up. Going to have some work done to carb. I want to get the cam done. Sould i use one from a later A, and get it ground or use my orignal cam? Does anybody have any specs for what kind of grind sould be used with the set-up that I have? And what would the compression ratio be, stock stroke? Will probably running close to stock rpm.


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Mike n Mo

10-05-2006 10:05:59

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 Re: camshaft work. in reply to JMH44, 10-04-2006 18:37:31  
For a regrind for stock RPM's, I would recommend about 215 deg@ 0.050 on the intake, and 206@0.050 exhaust, and as much lobe lift as you can get. Change the lobe separation angle to 107-108, set intake centerline to around 103-105. Mike

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10-04-2006 19:04:39

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 Re: camshaft work. in reply to JMH44, 10-04-2006 18:37:31  
Waste of time and money unless you have it stroked.

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10-05-2006 08:26:55

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 Re: camshaft work. in reply to RWWisehart, 10-04-2006 19:04:39  

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Mike n Mo

10-05-2006 09:59:54

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 Re: camshaft work. in reply to JDG HOSEY, 10-05-2006 08:26:55  
The early styled A thru 630 cam specs are the same as far as duration, lobe lift and lobe separation, so unless your cam is worn, there is no benefit to replacing the cam with another stock one. Mike

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