Posted by The tractor vet on January 09, 2019 at 08:39:31 from (104.179.81.68):
In Reply to: Farmall m heads posted by tbaumer24 on January 09, 2019 at 05:54:10:
Ok so you want to mill the head , What happens when you do this is that the VEE shaped water passages start to get wider and then they get to wide for them to seal against the head gasket . And you now have a great boat anchor . Ya want to gain more pony power ya need CUBIC INCHES and higher compression . So ok you install the over bore kits that are out there along with a gas head off a say a 450 then ya have the cam done ya do some carb work , you do some valve work on the 450 head and some flow bench work then ya have everything balanced do some dist work , Now keep in mind here we are making a PULLING engine NOT a Drag race engine and tricking out a dist is NOT the same as both ( took me several years to figure that out ) . And one more thing here never believe what you read in some of the adds on how is pedalling the best pulling parts . On a basic M that has had some of this work done you will end up with someplace around 60-65 Hp at around 10% above stock RPM . The best one that have put together and is still used on the farm as awork tractor is my buddy's S/MTA and it will out do a 706 and it will run the feed grinder almost as well as the 806 . That one is sporting 4 and a 1/8th high alt. pistons a 450 gas head (not LP) a reground and blue printed 450 cam a 450 intake a recurved Dist. some mild head work with a larger intake valve a balance job and a little carb work and every thing was hand fitted , The down side is that when working she get thirsty and ya can get about four hours to a tank when ya put the 4x16'sbehind it at 8 to 10 inches deep in third . Mine will not do it . Next to think about is the fact that someone out there will always have more and willing to spend more or cheat more for the bragging rights . and to win that trophy . Keep in mind here i don't care what you try to do with a M there will be that guy that comes in with a YELLOW hunk of iron that will knock your socks into the creek and will have far less in his . Yep already did that and built and engine usen all JUNK parts except rings bearing and gskt and went dumpster diving for the pieces and parts and put together a monster motor .
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