Massey Harris 44 head

[MHfreeman]

Was looking at upgrading the valves in my 44 pulling tractor and doing some port and polishing while I had it apart what valves are most people using.
Thanks.

 

[560Dennis]

Id take the time to go to a performance engine shop and have them give you their opinion . I always have them install inserts and a three angle valve grind to help it breathe. Might well have them give the head the works while you got it out,.lets us know what happens ?

 

[VicS]

I Agree. Your Head is most important part. Take your manifold also. Read the articles below about carbs. Make sure they have a flow bench. On my allis I put dowel pins in head to hold manifold perfect. Then made it match. Doubt if exhaust needs anything.

 

[FarmHills53565]

The problem is the head chamber design does not allow much room for larger OD valves. I used OEM sized valves but had custom seats made with a larger ID so I could remove A LOT of cast to open up the ports. I opened up the manifold as well. I took .25 off the surface of the head. I have 67 hp with standard stroke, M&W pistons, and a reground cam. I can do head work myself, so it did not cost much to do the upgrade.