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JD model 40 cam intake centerline

I

insearchof

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Does anyone know what the stock camshaft intake centerline is for a JD model 40? Would also like to know the rod length and the valve diameters. Thanks
 
(quoted from post at 15:18:45 12/20/14) Does anyone know what the stock camshaft intake centerline is for a JD model 40? Would also like to know the rod length and the valve diameters. Thanks
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The info is in the Field Service Bulletins and " The First Numbered Series by the late great JR Hobbs.
1-13/16 and 1-9/16. Valve spring pressure a modest 39-45 pounds.
I can't find the cam data without some time leafing through two rather thick binders of data from Duane Larson. His estate now has all the data on pdf.
http://jd2cylservice.com/

If you want to soup up a 40. one of the better methods is to use the late 440 industrial gasser engine. Add some extra compression, custom ground cam and valve/port cleanup. Probably 40HP if built right.
Still isn't going to beat a souped up farmall Super H however.
 
Thanks for the valve sizes.

I was asked to design a camshaft grind by a person who is building a 40 for pulling. I have done many for the models B, A, and G. This would be my first 40. I have all the stock cam specs except for installed intake center line and the owner lives in another state and doesn't know how to use a degree wheel. I don't have access to a 40 or I would degree it myself.

Do you happen to know how long the connecting rods are?

Thanks again....
 

I would tell your buddy to slip a late 440 gasser engine into that 40. It will make more power than a souped 40.
The external_link on this site that has connections to several cam grinders . They will grind a cam to perk up an OilPull, lister petter, JD two cylinder or even a Kohler garden tractor engine.
 
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