400 N and P codes

[Nacho-RT74]

I know 400 M code is 2 bbls but both N and P codes are 4bbls... what's the difference ?

[ipstrategies]

N code - 71 383-4 my charger is a 71 n code
P code - 72  400-4
M code - 72  400-2
In 71 the L code 383-2 which I have as a parts car


M    Special Order V8 1967
   440-6    1969
   400-2    1972-76
   318-4    1981-82
      
N    383-4    1970-71
   400-4    1974-78
   318-4 HD 1981-82
      
P    340-4    1968-69
   400-4    1972-73
   400-4 HP 1974-78
   318-2    1983-89

[pettyfan43]

The n code engine is the standard 400 4 barrell. The P code is the HP 400. Not really sure all the differences but there are apparently two different ones.

Also I COULD BE WRONG!!!!! BUT I think the N code 400 is the big car/pickup engine, the P code engine is the B-Body Charger/RoadRunner and later Charger/Magnum/Cordoba  and also the engine that came in some police cruisers.

[Nacho-RT74]

ok, dunno if between 72/74 really does exist a 400 4bbls what is not Magnum engine so "HP".

[ipstrategies]

Yes confusing,
I knew 70 & 71 N were 383-4 and 70 & 71 L were 383-2
72 had M400-2 and P 400-4 (lI almost bought 72 P code 400-4)
above 74 was not sure I had a 74 318 Charger for a little while but kept loking until I found what a I wanted a 71 383-4 N code

[69CoronetRT]

The n code engine is the standard 400 4 barrell. The P code is the HP 400. Not really sure all the differences but there are apparently two different ones.

Also I COULD BE WRONG!!!!! BUT I think the N code 400 is the big car/pickup engine, the P code engine is the B-Body Charger/RoadRunner and later Charger/Magnum/Cordoba  and also the engine that came in some police cruisers.

You're right on...from 74-78 there were two versions of the 400-4bbl (N and P). One application for single exhaust C bodies and one with the dual exhausts or basically the HP version. The HP version had different a different cam some years. It all came down to application and availibility by state.

[Nacho-RT74]

ok, now makes sense... Is just that on Rock auto website when yopu make teh search does appear on engine choose N and P whne you already selected Charger and as far I know no one 400 4bbl on Charger was non HP or magnum

[69CoronetRT]

ok, now makes sense... Is just that on Rock auto website when yopu make teh search does appear on engine choose N and P whne you already selected Charger and as far I know no one 400 4bbl on Charger was non HP or magnum

Depends on what year Charger we're talking about and where it was sold. The HP was N/A in California in some applications.