Sure is quiet in here....do I need to start a fight?

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Looks like wrong size ring. Or you still have some aluminum buildup.
Hey Scoot. I'll go with wrong sized ring. Cylinder was pretty clean. I acid cleaned, scotchbrighted and then sent to John for authentication. Lol. I don't trust myself to judge but do trust his judgment. LOL.


Rick
 
I'll check mah part # on the ring. Squish was good at 0.29-0.34.


Rick
Ring part# I got was the non EPA part #
503 28 90-10

part# for the EPA version is 503 28 90-11 which also fits the 353.

Found one source that say the part # for EPA is 46mm and the non EPA 45mm but it looks cornfused.
 
Ring part# I got was the non EPA part #
503 28 90-10

part# for the EPA version is 503 28 90-11 which also fits the 353.

Found one source that say the part # for EPA is 46mm and the non EPA 45mm but it looks cornfused.

My 350 is an EPA version 45mm

Not sure if they made a 45mm non EPA

The 44mm maybe non EPA
 
Ring part# I got was the non EPA part #
503 28 90-10

part# for the EPA version is 503 28 90-11 which also fits the 353.

Found one source that say the part # for EPA is 46mm and the non EPA 45mm but it looks cornfused.

When building a motor ALWAYS check end gap....be sure to check it above the transfers and ex port....use piston skirt to make sure it's square to the bore. Very rare you need to file to fit.....but to little end gap can cause real problems.....
 

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