m pistons in a d

[1948 mm]

I was wondering if anyone has ever installed a 4" IH M piston in a D case tractor. We want to go to 4" sleeve but it is hard to find a high compression piston for a D, but a little easier for a M. Thanks
 

[mshultz]

Not sure about height of wrist in diameter. You may have more room to wiggle with other heads, but some heads need "right and left" pistons - the chambers aren"t straight down the line. So 2 pistons have the dome slanted one direction, and the other two the opposite.
 

[Kip-Utah]

If you want a standard 4" flat-top with no dome, valve reliefs etc. have you considered Allis WC or WD pistons? Of course all of the later 226 cid engines,ie; WD45,D17,170,175,and Gleaner E combine,all use 4" pistons as well...but all of these would be reversed dome "power crater" design.
 

[mEl]

[ss409]

welded rods! a real case/farmall merger huh? use M tops and case bottoms.
 

[mEl]

There yu go, ran a set for years, D tops ,Massey 44 bottoms, nuther set H bottoms D tops, never had a problem with either.

Yuh gotta love the merger stuff huh?

Really, the skys the limit when you get to workin this stuff out.

mEl
 

[dboll]

the wrist pin is alot lower in a farmall piston, you will need shorter rods or a deck spacer to put them in a Case
 

[dboll]

if you want a 4" flattop for a Case they are not hard to find, I am sure Don Livingston has some.
 

[ss409]

never broke one yet n we have beat the crap out of em.