'The 383' ~ Getting Those True Factory Horsepower Ratings

[69 Cuda 440]

Mopar 383 ~ 4-Barrel

With Timing Set @ 35* Total Advance

Year ............ Advertised HP ............... True Factory HP

1963 .................. 383 ~ 330 HP .................... 285 HP

1964 .................. 383 ~ 330 HP .................... 285 HP

1965 .................. 383 ~ 330 HP .................... 285 HP

1966 .................. 383 ~ 325 HP .................... 278 HP

1967 .................. 383 ~ 325 HP .................... 278 HP
1967 .................. 383 ~ 280 HP {A-Body} ...... 271 HP

1968 .................. 383 ~ 330 HP ..................... 288 HP
1968 .................. 383 ~ 300 HP {A-Body} ...... 283 HP
1968 .................. 383 ~ 335 HP ..................... 303 HP > {Road Runner / Super Bee}

1969 ................. 383 ~ 330 HP ..................... 288 HP
1969 ................. 383 ~ 330 HP {A-Body} ...... 295 HP
1969 ................. 383 ~ 335 HP ..................... 303 HP > {Road Runner / Super Bee}

1970 ................. 383 ~ 330 HP .................... 288 HP
1970 ................. 383 ~ 335 HP .................... 303 HP > {Road Runner / Super Bee}

1971 ................. 383 ~ 300 HP ..................... 299 HP > {w/Holley Carburetor}

~ The Magical 1962 - 383/343 HP 'Dual-Quad'

Yes, that was the 'best one'.

 

[Abodybomber]

That was a very good night at 100 degrees.

Yes,it was... We ( car club) gave some soul &sweat here.... It took a lot of " the before night ' hustling , to make it work... I dead lifted the pig in, I miss that stuff'...

 

[69 Cuda 440]

Hey Noonan,

If you look up the 1969 Mopar 'Package Stock Option', you will find the
details on the 383 Performance Items.

 

[69 Cuda 440]

Mike,

The 1969 Road Runner 'Convertible' 383/335 HP was heavy enough
{#3574 lbs.} to get into the {10.50 to 10.99 Wt/HP} NHRA Class.

 

[69 Cuda 440]

'The Package Stock Option'

Included;
* Camshaft {Part #3412004} ~ {.484" Lift ~ 284* Duration ~ 68* Overlap}
* Matched Lifters
* Edelbrock DP-4B Aluminum Intake Manifold {Part #2836149}
* Holley #3310-1 {780 CFM Carburetor} {Part #2836172}
* Air-Cleaner Mounting Base
* Hooker Headers ~ 1 3/4" Primary ~ 42" Tube Length ~ Collector Outlet 3"

According to the Mopar Performance Guide, this package would add {+50 HP}
to the 383, and would knock {4/10's} off your Elapsed Time {with Closed Headers}.

 

[69 Cuda 440]

Bean Man,

Here is what Plymouth posted in November 1967.

1968 Plymouth Road Runner '383' {Coupe}
* 4-Speed {Inland Shifter}
* 3.55 Gears 'Sure-Grip'
* F70 x 14" Tires

Best Performance ......... 14.74 @ 97.60 MPH
--------------------------------------------------------------

Performance Upgrades
* 26" Heavy-Duty Radiator
* Viscous Fan-Drive
* Fan Shroud
* Dual-Point Distributor
* Champion J-10Y Spark Plugs
* High-Performance Ignition Wiring
* Accel Hi-Performance Coil
* Performance 'Advanced' Timing
* 3.91 Gears
* Hurst 'Competition/Plus' Shifter

Best Performance ......... 14.29 @ 99.07 MPH
--------------------------------------------------------------

Bolt-On Goodies
* Edelbrock DP-4B Aluminum Dual-Plane High-Rise Intake
* Holley #3310-1 {780 CFM} Carburetor
* Casler 7" Wide x 27" Tall Slicks
* Adjustable Pinion-Snubber

Best Performance ......... 13.98 @ 101.49 MPH
--------------------------------------------------------------

Performance Add-On's
* Holley High-Pressure Fuel Pump
* Hooker Headers {1 3/4" Primary x 42" Tube-Length x 3" Collector Outlet}

Best Performance ......... 13.75 @ 103.88 MPH
--------------------------------------------------------------

Camshaft Swap-Out
* 'Hydraulic' {.484" Lift ~ 284* Duration ~ 68* Overlap}
* Matched Lifters {-.0005" under-size ~ 'Low-Friction'}
* Double-Roller Timing Chain

Best Performance ......... 13.60 @ 105.50 MPH