Anonymous-0
Well-known Member
Does anyone know what the compression should be on a Farmall Super C?
- Thread starter Anonymous-0
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Red Dave
Well-known Member
Flat top pistons - 105-110psi or so would be about normal for a new rebuild. Less as it gets worn.
High Compression or Fire Crater pistons - 130 - 135psi, maybe a little more with oversize pistons on a new rebuild.
All four cylinders should be within about 10% of each other and there is some varience from engine to engine.
High Compression or Fire Crater pistons - 130 - 135psi, maybe a little more with oversize pistons on a new rebuild.
All four cylinders should be within about 10% of each other and there is some varience from engine to engine.
Anonymous-0
Well-known Member
I am new to tractor restoration. A man has a super c and two c tractors for sale. The super c runs good, but it needs a lot of work and just wanted to test the compression etc.. I guess all three of these tractors dont have live ptos.
Red Dave
Well-known Member
You are right, none of them will have a live PTO.
You won't know what kind of pistons it has, and it has an unknown amount of hours on it so I would look for 90psi and above and the high cylinder no more than 10% higher than the low cylinder. Anything over 90 psi is better yet.
You won't know what kind of pistons it has, and it has an unknown amount of hours on it so I would look for 90psi and above and the high cylinder no more than 10% higher than the low cylinder. Anything over 90 psi is better yet.
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