Chrysler 75 Engine Number?

[deichenb]

Hello,

I am a new Chrysler 75 owner and, during the engine rebuild, we noted the engine stamping R250162. I know that the R was the alphabetic prefix for the Chrysler 75 and that for each engine type/model Chrysler would start with that model's letter followed by 1001 (ie: R1001). Is there any significance to the digits thereafter, or were those simply sequential? My car is FedCo number CY7L.

Thank You,
David

[keiser31]

I believe that the numbers after the "R" are sequential numbers. The engine numbers for the 1929 Model '75' went from R250001 to R309150, so it looks like you have the 161st Chrysler Model '75'.

[deichenb]

I believe that the numbers after the "R" are sequential numbers. The engine numbers for the 1929 Model '75' went from R250001 to R309150, so it looks like you have the 161st Chrysler Model '75'.

Thanks for your quick reply, keiser. How do you derive 161st from the sequential serial number? I can't "do the math" based on the difference from R250001.

[keiser31]

Take your number which you said is R250162 and minus the R250001 which is the starting number sequence. That, I believe makes your engine the 161st engine for the Model '75'. Does that make more sense?

[deichenb]

Take your number which you said is R250162 and minus the R250001 which is the starting number sequence. That, I believe makes your engine the 161st engine for the Model '75'. Does that make more sense?

Yes - that makes sense. I'm sorry for my obtuse math from my last reply. So total 75 production would have been 59149, and my block is a fairly early production piece. Is there a similr rhyme and reason to the FedCo plate, or were those essentially sequential, too? I know that FedCo numbering stopped after 1930 and serial numbers started then on chassis.

[keiser31]

I am still trying to figure out the FEDCO numbering system.

[1929model75]

Welcome to Chrysler 75 ownership they truely are fantastic cars. What body style do you have?

[keiser31]

Is this car in question a maroon and black coupe, by chance?

[1929model75]

John did you ever find the pics of that coupe?

[keiser31]

John did you ever find the pics of that coupe?

Nope.

[Bill-W]

Hello,

I am a new Chrysler 75 owner and, during the engine rebuild, we noted the engine stamping R250162. I know that the R was the alphabetic prefix for the Chrysler 75 and that for each engine type/model Chrysler would start with that model's letter followed by 1001 (ie: R1001). Is there any significance to the digits thereafter, or were those simply sequential? My car is FedCo number CY7L.

Thank You,
David

FEDCO serial numbers were six digits in length, originally 3 letters and three numbers. The number you gave is two digits short. The `CY` at the beginning is correct as is the `L` at the end. In between is 7xx, x7x, or xx7. The plate will have the numbers in the centre with it spelled out in small letters above it. 7 was usually put as sevn.

Need the missing two digits for a complete serial number.

The letters Chrysler used, and their numeric equivalents -

W - 0
P - 1
C - 2
H - 3
R - 4
Y - 5
S - 6
L - 7
E - 8
D - 9

Thus CY is 25 and L is 7. The 75, model R, started at CY-050-P and ran up to CD-999-D. The numbers then started at ZW-000-P and ran to ZW-672-L.

In the U.S. Chrysler used K (DeSoto model K) and Z while in Canada letters A, B, F, G, J, N, and O were used. These additional letters have no numeric equivalents.

Bill
Toronto, ON

[keiser31]

I believe that my FEDCO plate on my 1929 Model '75' roadster was CY6R or some such number. Here is a photo of the plate. That is the number it was registered under.

[Bill-W]

I believe that my FEDCO plate on my 1929 Model '75' roadster was CY6R or some such number. Here is a photo of the plate. That is the number it was registered under.

The other two numbers, between the "CY" and "6R", are in the seal in the centre. They are difficult to see, but they are there. Your photo is a little too small to maginify and still see detail.

Bill
Toronto, ON

[Bob Scafani]

I know where the red and black coupe went

[keiser31]

I know where the red and black coupe went

Did you get it?