m, r, s code ??

MatteMan

New Member

Aug 7, 2004

72

0

0

Sweden, Skövde

Dec 19, 2004

#1

• Dec 19, 2004

• #1

Hello

I wonder what the difference is between M-code R-code and S-code ?

 

Max Power

Active Member

Jul 31, 2003

1,774

1

36

St Paul

Dec 19, 2004

#2

• Dec 19, 2004

• #2

Those are engine codes for various years. The M code is a 4v 351, S is a 390, and R is a 428 with Ram Air option. Ford used a Q code for non-Ram Air 428s, and H for 351 2vs, and F for 302s, and A,C or K for 289s and codes for 6 cylinders I never paid any attention to!

 

MatteMan

New Member

Aug 7, 2004

72

0

0

Sweden, Skövde

Dec 19, 2004

#3

• Dec 19, 2004

• #3

okej, thanks!

 

likesoldjunk

Founding Member

Mar 18, 2002

296

0

0

Calgary Canada

Dec 19, 2004

#4

• Dec 19, 2004

• #4

What about Q Code 351's ?

 

Max Power

Active Member

Jul 31, 2003

1,774

1

36

St Paul

Dec 19, 2004

#5

• Dec 19, 2004

• #5

Yup, they started in 1971, I believe, after Ford quit making the non-ram air 428s.

 

9

96 DOHC Cobra

Founding Member

Oct 14, 2001

542

0

16

Cerritos, CA

Dec 19, 2004

#6

• Dec 19, 2004

• #6

The "Q" code was also used for 66-68 regular 428s and 72-74 351C 4V motors.

 

3

390Fe

Founding Member

May 14, 2002

236

0

0

Pottstown PA

Dec 20, 2004

#7

• Dec 20, 2004

• #7

Lets really confuse the poor guy... in 1971 R code stood for Boss 351; in '72 it was the HO 351 (an 8.8 compression ratio Boss 351), In 69 and 70 "G" was a Boss 302

 

Max Power

Active Member

Jul 31, 2003

1,774

1

36

St Paul

Dec 20, 2004

#8

• Dec 20, 2004

• #8

Don't forget the X codes!!!

 

3

390Fe

Founding Member

May 14, 2002

236

0

0

Pottstown PA

Dec 20, 2004

#9

• Dec 20, 2004

• #9

Max Power said:

Yup, they started in 1971, I believe, after Ford quit making the non-ram air 428s.

Click to expand...

Wasn't "Q" used for the '71 429 CJ and SCJ? ARrgh! I'll stick to '69: F, G, H, L, M, Q, R, S, T, and X Whheeee!
(sorry, bad day at work)

 

6

65Mustang2+2

New Member

Jun 5, 2004

118

0

0

Connecticut

Dec 20, 2004

#10

• Dec 20, 2004

• #10

oh yeah, what about the little W- code "427" engine! Not in a Mustang though..... Too Bad.

 

M

McFairmont

Founding Member

Sep 8, 2001

329

0

0

Surrey, BC Canada

Dec 21, 2004

#11

• Dec 21, 2004

• #11

71 429`s

390Fe said:

Wasn't "Q" used for the '71 429 CJ and SCJ? ARrgh! I'll stick to '69: F, G, H, L, M, Q, R, S, T, and X Whheeee!
(sorry, bad day at work)

Click to expand...

Nope, the 360HP 429 Thunder Jet (big car & Torino-Montego) was coded "N"
The 429CJ was a "C"
the 429SCJ was "J"
On the 428`s, the non CJ versions were "Q", but these engines were only used in the Galaxie,full size Mercs &Tbirds. These cars never had the Cobra Jet version.
Also these "base" engines never came in a Mustang/Cougar, or Torino/Cyclone , only the 428CJ-SCJ in these cars.
So, in 68 & 69, there were 2 different "Q" code 428`s availabl, the base version in the larger cars, the CJ in the unibody smaller cars.

 

3

390Fe

Founding Member

May 14, 2002

236

0

0

Pottstown PA

Dec 22, 2004

#12

• Dec 22, 2004

• #12

McFairmont said:

Nope, the 360HP 429 Thunder Jet (big car & Torino-Montego) was coded "N"
The 429CJ was a "C"
the 429SCJ was "J"
On the 428`s, the non CJ versions were "Q", but these engines were only used in the Galaxie,full size Mercs &Tbirds. These cars never had the Cobra Jet version.
Also these "base" engines never came in a Mustang/Cougar, or Torino/Cyclone , only the 428CJ-SCJ in these cars.
So, in 68 & 69, there were 2 different "Q" code 428`s availabl, the base version in the larger cars, the CJ in the unibody smaller cars.

Click to expand...

Thanks... Now I remember - your reply finally percolated those codes to the top... And in all honesty I've never known what the full size codes were - thanks again