NORS piston mystery

[pkhammer]

 I have a few boxes of these McQuay-Norris pistons P/N P426-NX. On one box is written "'17-'20 International" which seems unlikely. Also is written "1950-1954 Nash" which seems more plausible. I cannot however find a Nash six that had a 3.1" bore which is what these measure. Any Nash experts want to weigh in?

 

  -thanks,

[Bloo]

I'm not expert but I used to own a Nash. Could it be 3.125? If not, my best guess is they are for the Nash 600 engine through 1949. The bore and stroke info that is cut and pasted all over the internet is wrong. If you do the math the cubic inches don't come out right. 200+ cubic inches for a Nash 600 cannot be right.

 

The 600 engine became the Statesman and Rambler engine in 1950 with a displacement increase, and then the Rambler 196 Flathead with another displacement increase later on (maybe 1954-1955?).

 

I don't recall what they did with the stroke, but the Internet's idea that the 600's bore is 3.4 just has to be wrong.

[roysboystoys]

NOS Aluminum Pistons (6) for Nash 1950-1951, 1953 models | eBay

 

 

__________PART DETAILS________________ BRAND: ---------------------- McQuay-Norris PART NUMBER: ----------- P426NX STD DESCRIPTION: ------------ Aluminum Piston 4 ring 3 1/8" bore size , 1.875" compression distance, 3.250" overall, height on piston, will fit other years, see notes VEHICLES USED ON: --- Nash 1950-51 6 cyl. Models 600, 5040, 5140, Rambler 6 1953 Model 5310 without Hydramatic transmission, more ** Unit for sale is: set of 6 pistons

NOTES: McQuay-Norris P426NX STD Aluminum Pistons 4 ring 3 1/8” bore size: Can be used on other years but they have to either have higher or lower compression distance (these are 1.875” compression distance) and overall height difference (these are 3.250” overall height).

Box is in good condition. We have 1 of these items at the start of this listing. FN - 2034 ______________________________________________

Edited March 29, 2022 by roysboystoys (see edit history)

[pkhammer]

  Now that's interesting. My dial calipers measure 3.130" but that is measuring a .030" oversize piston. 

  Thanks for the help!