3 1/4 in pistons

Mark W. · Mar 16, 2014

What would 3 1/4in. pistons in a super A mean? What was stock for a c113 block?

Janicholson · Mar 16, 2014

That is a 240 piston size 135CID IIRC Jim

Greg K · Mar 16, 2014

Someone else knows more than I do, but I think stock size on a 113 is 3". The next step is 3 1/8" used in a super c and like Jim said 3 1/4" is in a 135 inch motor.

IH fan · Mar 16, 2014

(quoted from post at 18:14:59 03/16/14) That is a 240 piston size 135CID IIRC Jim

Jim... 240 has a C123, not a C135. !35 was in the next series, the 404. But you are correct that the 135 is a 3.250" bore, the 123 is 3.125"

gene bender · Mar 16, 2014

It means you have a later block that will take the 3 1/4 pistons as earlier ones didnt

Anonymous-0 · Mar 16, 2014

Yup. Never had one, just memory.

CNKS · Mar 16, 2014

3.25 inch sleeves will fit in a Super A block provided it has a casting number of 354898R1-up That block is the same block as is in the Super A1 (one) and Super C. In the original block thick sleeves were used to keep the original 113 cu in because IH was not ready to release the Super A1.
The 3.25 inch sleeves give 132.7 cu inches not 135. The 135 cu in engine has a stroke of 4 1/16 as opposed to the 4 inches in the 113/123 -- barely enough difference to measure.

3 1/4 in pistons

Mark W.

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Janicholson

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Greg K

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IH fan

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gene bender

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Anonymous-0

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CNKS

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