Farmall C plans/ update

PretendFarmer

Well-known Member
As some of you know, I have a 1948 C that has low compression. It's gutless even at "stock" tractor pulls.
It has, from what I can tell, never been rebuilt. It's a 113 motor, flat tops, and no smile on the wife's face when the other lite pullers far out pull her.
So the plan is this; I've ordered the stepped head piston and sleeve kit 3 1/8". Going to reuse the lower end bearings. I will be swapping the head/intake-exhaust manifold/carb from my 140 to this tractor. I'm told the intake and exhaust valves are bigger and the combustion chamber is smaller so more compression. Also, the 140 is getting the mag, and the C will have the distributor.
Should I drill out the main jet a little or no?
So it'll go from 3" flat tops, mag ignition
To 3 1/8" stepped heads, coil and distributor ignition, 140 head manifold and carb.
Any predictions on power?
 
You are only gaining 10 cu in so there is no reason to enlarge the carb mite want to put the 240 gov spring to get more rpms
 
Why would you even consider reusing the old bearings???????? Next you will be back asking why the oil pressure is low.
 
Haven't been involved in pulling for a long time, but something to think about.
What are the rules of the group that you pull with? It might have changed over the years, but in some groups running "stock" meant "as available when built". Some changes were allowed before switching to "modified" class. Eg: if built in 48 with mag ignition, but dist avail in a later year, someone might raise a stink to have the dist ignition or newer style head/manifolds disqualified.
Personally, I get more enjoyment watching "out of field" class, with some cow stuff on the tires & a front mount cultivator instead of suitcase weights to scale out.
Willie
 
Not too many people run truly stock anymore. Tough to find a farmall with the from factory flat top pistons. 90 percent have been rebuilt.

If I remember correctly, our rules call for stock block. They don't get too picky about minor things. So even if I were to sleeve it up to 135ci I would probably still pull against stock here. Being its going up to 123ci I doubt there will be an issue. In our club its kind of up to directors discretion whats stock and whats modified. Generally whatever can fit in the stock block without machine work is acceptable.
Needless to say there would be quite a stink made from me if people called out our C as a "hot" tractor as 9 out of 10 pullers don't have truly from factory tractors.
 
The oil pumps have a habit of blowing out the
gasket, the bottom cover flexes a little. I
reinforced the cover and glued the gasket to it. I
gained a lot of oil pressure, and it only cost about
$5! The thickness of the gasket determines the
internal clearance so that is important.
 
I just can't imagine rebuilding an engine and not replacing the bearings! If the pistons and sleeves are worn to the point of having low compression those bearings are also worn, guaranteed. Bearings for that motor are cheap. Good Luck!
 
(quoted from post at 15:23:49 07/30/14) I just can't imagine rebuilding an engine and not replacing the bearings! If the pistons and sleeves are worn to the point of having low compression those bearings are also worn, guaranteed. Bearings for that motor are cheap. Good Luck!

So for $60 I ordered bearings. I measured the journal and its the standard 1.750".
The bearings looked real good but being that the bearings are cheap I'll put them in.
 
I took the oil pump apart and found the gasket to be shot. Where can I buy a new one? Can't seem to find one. I have gasket material.
 
(quoted from post at 20:12:38 07/30/14) I took the oil pump apart and found the gasket to be shot. Where can I buy a new one? Can't seem to find one. I have gasket material.

Have you tried a Case-IH dealer?
 

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