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SPFI piston sizes

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Im interested in putting the SPFI pistons in a EA81 for a hi compression one. I have all B sized pistons in my engine currently. How and where are the SPFI pistons marked?

  • Author

Bump? Anyone? Im waiting to get back in touch with this guy to make sure they will fit my block correctly.

IIRC, on the face of the piston there will be either an A or a B stamped on it, with a diamond outline.

  • Author
IIRC, on the face of the piston there will be either an A or a B stamped on it, with a diamond outline.

 

Yea thats what i found on my EA81 pistons. They were all B sized. But i guess the EA82 pistons are not marked the same. They have an arrow pointing towards the front of the motor, the word up at the top of the piston and a R (maybe for the right side). This is just the info i was given from the seller. Im not sure what to make of it cause i was told previously that they should be marked A or B as well.

The 2 EA82 short blocks I have here both have a B and UP on the pistons. One block is a carb model, other is SPFI.

Yea thats what i found on my EA81 pistons. They were all B sized. But i guess the EA82 pistons are not marked the same. They have an arrow pointing towards the front of the motor, the word up at the top of the piston and a R (maybe for the right side). This is just the info i was given from the seller. Im not sure what to make of it cause i was told previously that they should be marked A or B as well.

 

 

I have a set of EA82 SPFI pistons buried somewhere. I'll try and dig them out this weekend and take a picture.

  • Author
I have a set of EA82 SPFI pistons buried somewhere. I'll try and dig them out this weekend and take a picture.

 

Any luck with the pictures? Im curious what they look like. This way i can get back to the seller and get some pistons and get my build underway.

  • Author

Hey Craig thanks a ton. Ill let the seller see this and i can get moving on this thing. Thanks again!.

  • Author

If they are A sized pistons would they have been stamped or did they only stamp B size pistons? Reason i ask is the pistons i want are not stamped on the right side.

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