Advanced Search

About This Site
Racing Statistics
Table of Contents
What's New

© 1996-2008 by
Ken R. Noffsinger
All Rights Reserved
[AW Logo]

Street SuperBird Specifications
By Ken R. Noffsinger


[Limelight Green Hemi SuperBird - Near The Chelsea Proving Grounds, June, 1996] "Completion of dealer survey by ACCUSFIA covering the Plymouth SuperBird indicates that Chrysler Plymouth has complied with the production requirements established for 1970 stock car racing. The Plymouth SuperBird as delivered to dealers is therefore eligible for competition as of this date."

An excerpt from the Automobile Competition Committee for the United States' telegram officially notifying Chrysler on January 14, 1970 that they had produced and delivered a sufficient number of SuperBirds to make them eligible for competition.

Frame Type Unitized Body And Frame
Overall Length (in.) 221.0
Overall Width (in.) 76.4
Overall Height (in.) 61.4
Wheelbase (in.) 115.8
Tread, Front (in.) 59.7
Tread, Rear (in.) 58.7
Fuel Capacity (gal.) 19
Height Of Wing Above Deck Lid (in.) 24
Ground Clearance (in.) 7.2
Weight Balance, Front/Rear (%) 54/46
Shipping Weight (lbs.) 3,785
Manufacturer's Suggested Retail Price ($) (as of September 23, 1969) 4,298.00
First Car Produced Oct. 22, 1969
Last Car Produced Dec. 15, 1969
0-60 MPH Time (sec.)
(Estimated by Road Test magazine, April, 1970)
Quarter-Mile Performance (sec./MPH)
(Road Test magazine, April, 1970)
Top Speed (MPH) 130-160
Current Value ($) 440 4-bbl: 30,000
440 6-bbl: 40,000
426 8-bbl: 65,000

Where specifications vary depending upon standard or optional equipment, those found here are for a SuperBird with standard equipment only (except for top speed estimates).

The front fenders and hood were modified 1970 Coronet pieces. The front fender scoops were made of injected plastic and mounted via five studs. There were two distinct shapes to the scoops - a flat type and a much more rounded one. A car may have come from the factory with two of the same style or one of each.

All cars came equipped with Boar Grain vinyl roofs. The rear window was never tinted, even if the rest of the glass in the car was. No convertible SuperBirds are known to have been produced by the factory.

The nose was made of steel; the headlight buckets of fiberglass. The wing was aluminum, and the pitch of the horizontal portion was adjustable. The nose and wing were painted with lacquer; the remainder of the body was painted with acrylic enamel.

Top speed for the SuperBird as factory equipped is difficult to estimate. Terminal speeds of 130 to 150 MPH would seem reasonable, depending upon, among other things, the engine in the car. All SuperBirds came with 150 MPH speedometers.

Jim Fredericks' SuperBird, "Fly Rod", exceeded 216 MPH in the B/Production class at the Bonneville Salt Flats in the late 1980's. This made it the world's fastest production (gasoline fueled, normally aspirated) winged car.

As with top speed, current value is very difficult to estimate. Figures shown here are for automatic transmission, well documented, correctly date-coded, numbers matching cars in very good condition with few reproduction (non-original equipment manufacturer) items. Add 10% for four speed cars.

Return To Table Of Contents
Series: Mid-size R
Price Class: Road Runner M
Number Of Doors 2
Body Type: Hardtop 3
Engine U=440 4V
V=440 6V
R=426 8V
Last Digit Of Model Year: 1970 0
Assembly Plant: Lynch Road A
Assembly Plant Sequential Number Range 149789 to 181274

Vehicle serial numbers (or Vehicle Identification Numbers - VINs) are found on the driver's side of the car on (1) the upper portion of the dash pad at the base of the windshield and (2) the fender tag on the inner fender in the engine compartment. The SuperBird Fender Tag Decoding page provides instruction on analyzing SuperBird fender tags where the VIN, as well as other important information, are found. VINs may also be found on the top or rear face of the radiator upper yolk and/or the driver's side rear deck trunk lip.

The Assembly Plant Sequential Number begins at 100001 each production year. SuperBird assembly numbers appear sporadically throughout the stated range.

Broadcast Sheets are also a wealth of information and can sometimes be found in the car in one of these locations: on the backside of the glove box; under or behind the front seats or rear seats; under the carpeting.

Return To Table Of Contents
Block Cast Iron 90 Degree V-8
Cylinder Bore (in.) 4.32 4.25
Cylinder Stroke (in.) 3.75
Displacement (cu. in.) 439.7 439.7 425.6
Carburetion 1 4-bbl 3 2-bbl 2 4-bbl
Carburetor Maker Carter Holley Carter
Carburetor Model AVS 2300 AFB
Compression Ratio 9.7:1 10.5:1 10.25:1
Camshaft High Lift, Long Duration, High Overlap
Camshaft Duration,
Intake/Exhaust/Overlap (degrees)
276/292/54 292/292/68
Lifter Type Hydraulic
Valve Diameter, Intake (in.) 2.08 2.25
Valve Diameter, Exhaust (in.) 1.74 1.94
Distributor Aluminum, Single Breaker Prestolite, Cast Iron, Dual Breaker
Air Induction Under Hood
Exhaust System Dual, Low Restriction, Cast Iron Headers, 2.5 in. Diameter Pipes Into High Flow Mufflers
Brake Horsepower 375 390 425
RPM at Max. Horsepower 4,600 4,700 5,000
Torque (ft.-lb.) 480 490
RPM at Max. Torque 3,200 4,000

The exhaust pipes just back from the cast iron headers were in an "H" configuration - left and right pipes were joined together by an additional short section of pipe. In addition, Hemi cars sported resonator canisters, mounted just prior to where the pipes exited under the rear of the car. Most SuperBirds came with chrome exhaust tips. A few cars, and all California cars, came with down-turned exhaust pipes in the rear.

440 4-bbl SuperBirds carried the same Chrysler Corporation warranty as other Road Runner models. When equipped with either the 440 Six-Barrel or 426 Hemi options, they carried the restricted warranty of 12 months or 12,000 miles as offered on other high performance vehicles.

Production numbers vary somewhat, depending on the source. According to the Plymouth SuperBird NASCAR Race Program Serial Number List, 1,162 cars were produced with the 440 4-bbl. Another 665 carried the 440 6-bbl, and the remaining 93 were powered by the 426 Hemi. These figures add to a total of 1,920 cars produced. This list has some notable errors in it; those with a copy of it may wish to review the VIN Numbers page which explains some of the discrepancies found in the list.

Cars with original engine blocks will have the last eight digits of the SuperBird's Vehicle Identification Number (VIN) stamped on a pad on the lower right (passenger) side of the block, near the oil pan.

There were no external markings on the SuperBird identifying the type of engine.

Return To Table Of Contents
Four Speed
(18 Spline)
Transmission Ratios 2.45(first)
1.00 (third)
1.39(third) 1.00(fourth) 2.57(reverse)
Transmission Package Performance Axle Package Standard Trak Pak Standard
Rear Axle Type Semi-Floating Hypoid
"Sure Grip"
Rear Axle Ratio/Ring Gear Diameter (in.) 3.55:1/8.75 (Chrysler) 3.54:1/9.75 (Dana 60)
Driveshaft Diameter (in.) 3.25
Driveshaft Length (in.) 51.50 50.39

Various sources report the following transmission break-out for 440 Six-Barrel and 426 Hemi cars:

440 6-bbl 408 Automatics
440 6-bbl 308 Four Speeds
426 8-bbl 77 Automatics
426 8-bbl 58 Four Speeds
440 4-bbl 618 Automatics
440 4-bbl 466 Four Speeds

This adds to a total of 1,935 SuperBirds, Chrysler Historical Society's "official" number and one of the other frequently quoted total production numbers (like the 1,920 discussed in the Engine section above). In the case of 4-bbl and 6-bbl engines, four speed cars comprise 43% of the total in each. Using this percentage, and applying it against 1,084 440 4-bbls (this count of 440 4-bbl cars is associated with the 1,935 total production figure) provides the break-out for 440 4-bbls shown above. More information on the topic of total production is available in the Where Are They Now? page.

Cars with original transmission cases will have the last eight digits of the Vehicle Identification Number (VIN) stamped on a pad on the right (passenger) side of the transmission case.

Automatic transmission cars either had a column mounted shifter or one on the floor as part of a console (a small round shifter knob was used in this case). Four speed SuperBirds came with floor mounted shifters only, with and without consoles. The non-console equipped cars had a long Hurst pistol grip type shifter, while the console cars had a much shorter pistol grip assembly.

Return To Table Of Contents
Suspension, Front Independent, Lateral, Non-Parallel Control Arms With Ball Joints And Torsion Bars
Torsion Bar Diameter (in.) .92
Torsion Bar Length, (in.) 41
Rate At Front Wheel (lbs./in.) 124
Shock Absorbers Extra Heavy Duty, Tubular, Hydraulic-Telescoping
Sway Bar Diameter, Front (in.) .88
Suspension, Right Rear Extra Heavy Duty,
Semi-Elliptical Springs,
5 Leaves Plus 2 Half Leafs
Suspension, Left Rear Extra Heavy Duty,
Semi-Elliptical Springs,
6 Leaves
Rate At Rear Wheel (lbs./in.) 148
Brakes, Front Kelsey-Hayes
10.97 in. x 6.98 in. Vented Disc,
Floating Caliper
Brakes, Rear 10 in.x 2.5 in. Drum

Shock absorbers were the double acting type, mounted with rubber bushings.

The asymmetrical rear springs were 58 in. in length and 2.5 in. in width, outboard-mounted, with pivot rubber bushings in the front and shackle rubber bushings in the rear.

The braking system used a dual master cylinder - one system for the front; another for the rear. Front power disc brakes came standard on all SuperBirds. Rear brakes were self-adjusting, servo contact, self-energizing with bonded linings. Brake shoes were the internal expanding type, and there was a separate mechanical parking brake.

Return To Table Of Contents
Color Percentage Of Total
Alpine White 17%
Blue Fire Metallic 14%
Corporation (Petty) Blue 5%
Lemon Twist Yellow 23%
Limelight Green 11%
Tor Red 14%
Vitamin C Orange 16%

No records were kept by Chrysler as to the number of SuperBirds produced by color. Galen Govier maintains a huge registry for SuperBirds, and based on his sample of cars and their colors, a reasonable estimation of car color as a percentage of total production can be arrived at. The percentage values presented in the table were calculated in this way.

Colors listed in the more darkly shaded blocks were special order, extra cost colors. Of these extra cost colors, all but Corporation Blue were sometimes referred to as "High Impact" colors.

At least one car has been documented as having been painted Deep Burnt Orange Metallic by the factory, even though this color was not advertised as available for the SuperBird.

The rear quarter panel decal "Plymouth" was normally white on blue and red cars, while black decals were found on green, orange, white and yellow cars.

Return To Table Of Contents
Standard Optional
Seats Black Bench Seats Black Bucket Seats
White Bench Seats White Bucket Seats

All seats were made of vinyl material. Black bucket seats had a charcoal bolster.

The carpet, instrument panel and shelf panel, steering wheel and headlining were always black.

Return To Table Of Contents
Standard Optional
Tires F70x14 in. White Sidewall Tires F60x15 in. Raised White Letter Tires, Polyglas GT
F70x14 in. Raised White Letter Tires, Polyglas
14x5.5 in. Magnum 500
14x6.0 in. Rallye
14x6.0 in. Stamped Steel
15x7.0 in. Rallye
15x7.0 in. Stamped Steel

All tires were of bias ply design and made by Goodyear.

The vast majority of cars appear to have come with 15x7.0 in. Rallye or 14x5.5 in. Magnum 500 wheels. Some F60x15 in. Polyglas GT tires did not have had the size indicated in raised white letters.

The spare tire always came with a stamped steel wheel, which would typically be body color. All SuperBirds had two jacks. This was necessary because the car did not have a standard front bumper, therefore a scissor type jack was necessary to raise the front of the car.

1970 was the last year for left hand lug nuts (fortunately).

Return To Table Of Contents
Standard Equipment
3.54:1 Sure-Grip 9.75 in. Axle With Four Speed 3.55:1 Sure-Grip 8.75 in. Axle With Automatic
3-Speed Wipers With Electric Washers 70-amp HD Battery
Carpeting Cigar Lighter
Delete Transverse Tape Stripe, Add "Road Runner" Drip Rail Mouldings
Dual Exhaust System F70x14 in. White Sidewall Tires
F70x14 in. Raised White Letter Tires Polyglas Firm Ride Shock Absorbers
Four Barrel 375-hp V-8 Engine, 440 Super Commando Front Disc Brakes
Front Heater Front Sway Bar
Glove Box Lock Heater Controls Lamp
Hemi Suspension Hood Pins
Hub Caps Inside Day/Night Rear View Mirror
Lower Half Horn Ring Steering Wheel Maximum Cooling Package
No Radio Oil Pressure Gauge
Outside Left Hand Manual Chrome Mirror Performance Axle Package
Power Brakes Power Steering
Road Runner "Beep-Beep" Horn Special Order Black Vinyl Roof
Sure Grip Differential Torque Drive Fan
TorqueFlite Automatic Transmission Track Pak
Optional Equipment
14x6.0 in. Rallye Wheels 15x7.0 in. Rallye Wheels
14x5.5 in. Road Wheels Magnum 500 2 Spoke Rim Blow Steering Wheel
Accessory Floor Mats Air Foam Bench Seat Cushion
AM Radio AM/FM Radio
AM Radio With Stereo 8-Track Player Body Belt Mouldings
Bright Exhaust Trumpets With Low Restriction Tail Pipes Bucket Seats
Center Front Cushion With Folding Arm Rest Chrome Exhaust Tips
Console With Lock and Key Custom Sill
Deluxe Seat Belts Door Edge Mouldings
Dual Four Barrel 425-hp V-8 Engine, 426 Hemi Electric Clock
Engine Block Heater Evaporative Emission Control (required in California)
F60x15 in. Raised White Letter Tires Polyglas GT Four-Speed Manual Transmission
High Impact Paint Left Hand Six-Way Adjustable Bucket Seat
Noise Reduction Package (required in California) Outside Left Hand Remote Chrome Mirror
Outside Right Hand Manual Chrome Mirror Pedal Dress-Up
Power Windows Rear Arm Rests
Rear Bumper Guards Rear Window Defogger
Shoulder Belts - Rear Tachometer With Clock
Three-Two Barrel 390-hp V-8 Engine, 440 Six Barrel Tinted Glass All
Tinted Windshield Only Under Coating With Hood Pad
Woodgrain Sports Steering Wheel
Not Available
Road Runner equipment not available when the A13 SuperBird package was ordered were: 14 in. Deluxe Wheel Covers, 14 in. Wire Wheel Covers, Air Conditioning, Air Grabber Hood, All Windows - Clear, Automatic Speed Control, Axle Packages (A31, A32 and A34), Basic Group, Body Sill Mouldings, 11 in. Heavy Duty Brakes, Headlight Delay, Hood Performance Paint Treatment, Light Package, Rear Speaker, Road Runner Dust Trail Stripe, Trailer Towing Package and Woodgrain Instrument Panel.
Return To Table Of Contents

Information found here, unless otherwise noted, is intended to describe "typical" SuperBirds as equipped by the factory and advertised by Chrysler. No attempt has been made to document all possible equipment or features (including dealer installed items such as air conditioning) that may be found on as few as one SuperBird. Information to that degree of detail is available from expert sources such as Galen Govier, who maintains a very sizeable registry for the cars.

The following sources were consulted while compiling this page:

  • By The Numbers by Galen V. Govier in Mopar Muscle, December/January, 1992.
  • Chrysler Corporation Part & Casting Numbers Book, 1962 - 1974, Sixth Printing, January, 1996 by Galen V. Govier.
  • Chrysler-Plymouth Special Parts and Maintenance Schedule for Road Runner SuperBird, prepared by the Technical Services Department of the Chrysler-Plymouth Division of Chrysler Corporation (not dated) and reprinted by the Daytona-SuperBird Auto Club.
  • Databook & Price Guide, Road Runner/GTX 1967 - 1980, compiled by R. Perry Zavitz, 1986.
  • David J. Patik.
  • Galen V. Govier.
  • Mopar's Mightiest Powers This Winged Road Runner Hemi SuperBird by Bob Stevens in Muscle Cars of the '60s/'70s, July/August, 1991.
  • 1970 Belvedere Code List in Chrysler Quarterly, Winter, 1989.
  • 1970 Plymouth Road Runner SuperBird Judging Form: 1993 by Dave Patik, 1993.
  • 1970 Plymouth Service Manual - Belvedere, Fury, Barracuda, Valiant, prepared by the Chrysler-Plymouth Division of Chrysler Corporation (1969) and reprinted by Year One, Inc.
  • Plymouth SuperBird NASCAR Race Program Serial Number List, prepared by Product Planning Technical Services Fleet Engineering, Chrysler Corporation (not dated) and reprinted by the Daytona-SuperBird Auto Club.
  • Quicksilver Supercar Series: MOPAR - Dodge & Plymouth, The Performance Years by Martin L. Schorr, 1982.
  • Reason Enough - SuperBird, the Ultimate Road Runner by Jason Scott in MuscleCar Review, August, 1992.
  • Roadrunner, A Source Book, edited and annotated by Samuel A. Shields, Jr., 1983.
  • 1970 Plymouth SuperBird: Truly a super 'Bird - Road Test Review by Tony Grey in Muscle Cars of the '60s/'70s, March/April, 1992.