There are no piston numbers even close to that in my book. The flathead piston numbers in my book are c790dr with different strokes available. I would give them a call. They are in Anaheim Ca. 714-579-3795
thanks that is only thing on the pistons if i had a 4 inch stroke piston to match it to then i would know
the piston has 1/8 lc on the top and 3 5/16 they are shorter then my 3 3/4 stroke pistons by 125 so they must be 4 inch stroke so what is th 1/8lc stan for
192XD fits 1939-53 Mercury 8-cyl dia. 3-5/16,3-3/8,3-7/16,3-1/2 length2-25/32 plus 3/16 dome comp.1-35/64 pin 750-FF rings 2-3/32-C 1-5/32-O Last Footnote--- Give Stroke When Ordering.
Heres how I think it works 1/8 is the wrist pin is higher in piston by 1/8. 3-3/4 stroke ford with this piston would be low compress with this piston. 4 inch stroke merc crank has 1/4" more stroke 1/8 higher and 1/8 lower so you have 4" stroke merc pistons that are 3 5/16 bore.
If the #192's are only 1/8" shorter than the pistons that you KNOW to be for 3-3/4" stroke, then I would think they were intended for use with a 4" stroke (as you said in post #11), not 4-1/8" stroke. Maybe thats why somebody got rid of them? Ron.
that is what i was thinking they have the 1/8 lc on top i bought as a 4 1/8 stroke that was i was told they were if i stick a pin from one piston to the other one it is .125 shorter then my 3 34 that i took out of my block so if they were 4 1/8 theyshould be shorter yet by anouther .0625 right
That is absolutely correct. You might get away with them on a 4-1/8" stroke, but compression would be awful high. Also the skirts might not clear the counterweights at or near bottom of the stroke. Just curious, is the pin the same height from the bottom of piston on both? I would think that they would have to be, or you would have the interference problem I just mentioned.