C rebuild to Super C

M

mikes5785

Well-known member
I’m getting ready to overhaul my 49 C I’d like to upgrade it to Super C specs. I understand that the cylinder sleeves and pistons are larger and have a higher compression ratio.

Is the cam different? Are there any other differences or upgrades that need to be made. I’ve already got a water pump to upgrade the cooling system

Thanks

Mike
 
Most new sleeve sets for C's are an overbore kit to 3-1/8" which would put you to Super C specs. Pretty sure the cams are the same. I wouldn't worry too much about a water pump unless you plan to pull the snot out of it, the radiator outlet size on a C is slightly smaller than the inlet on the water pump for a Super C. I can't remember the exact size, but it's like an 1/8 difference in size, so you'd have to find a hose to fit. I believe they increased the maximum engine rpms to gain extra power along with the larger bore.
 
Farmall C and Super C are both rated at 1650 rpm. Farmall A & B are rated at 1400 rpm. The change is accomplished with a different governor spring, one a little longer than the other.
 
I believe the head gasket is different with a pump than an engine without. Water ports in the gasket are a different size. Sorry, I can't remember which is which.
 
He is correct head gaskets are different for siphon cooling system and the water pump.
Flush engine and clean radiator on the C ,you will be fine . Very important the fan pulley bearing is lubricanted , check it for wear.
 
DJ54 said:
Most new sleeve sets for C's are an overbore kit to 3-1/8" which would put you to Super C specs. Pretty sure the cams are the same. I wouldn't worry too much about a water pump unless you plan to pull the snot out of it, the radiator outlet size on a C is slightly smaller than the inlet on the water pump for a Super C. I can't remember the exact size, but it's like an 1/8 difference in size, so you'd have to find a hose to fit. I believe they increased the maximum engine rpms to gain extra power along with the larger bore.
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From what I've researched
The C, Super C, and 200 were 1650 Full Load RPM, 1815 No Load High Idle RPM so since it's the same RPM but bigger bore in the SC and the 200 you have more HP
The 230 was 1800 Full Load, and 1980 No Load
The 240 was a sports car, 2000 Full Load and 2200 No Load

That being said you can get a 123 in a 100 to run at 1800RPM, not that I've done it on purpose. Maybe accidentally and it's like driving a sports car.

From what I've come across the reason the C123 was higher in the C line was it was a plowing tractor where the A line was more of a precision cultivating tractor thus didn't need the higher RPM.

HP ratings were
C- 21-22
SC/200- 24-26
230- 28-29
240- 31-32

So what I find interesting is the SC and 200 were putting out as much as an H did, and the 240 was closing in on M territory in a much smaller frame.
 
ShawnAgne said:
From what I've researched
The C, Super C, and 200 were 1650 Full Load RPM, 1815 No Load High Idle RPM so since it's the same RPM but bigger bore in the SC and the 200 you have more HP
The 230 was 1800 Full Load, and 1980 No Load
The 240 was a sports car, 2000 Full Load and 2200 No Load

That being said you can get a 123 in a 100 to run at 1800RPM, not that I've done it on purpose. Maybe accidentally and it's like driving a sports car.

From what I've come across the reason the C123 was higher in the C line was it was a plowing tractor where the A line was more of a precision cultivating tractor thus didn't need the higher RPM.

HP ratings were
C- 21-22
SC/200- 24-26
230- 28-29
240- 31-32

So what I find interesting is the SC and 200 were putting out as much as an H did, and the 240 was closing in on M territory in a much smaller frame.
Click to expand...
I find the ratings stated by mfg. are deliberately underrated. For the best number refer to NTT numbers. Also if all ihc shop manuals rebuild recommendations are followed you will be pleased with results. The magneto mechanic advance will have to be retimed with the domed pistons . If not then the flat top pistons will out preform the domed pistons. This makes for a very frustrating experience for those that don’t follow the advice .Refer to fire crater pistons bulletin for details of what’s what on this subject.
 
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