1970 Dodge Challenger R/T
List of Modifications
Engine Block
Original "numbers matching" 440 cubic inch (7.2 L) HP2 Chrysler RB V8.
Bored 30 thou oversize.
Keith Black quench dome 10.5:1 hypereutectic pistons.
Half inch oil pick-up. High volume pump. Windage tray.
JP Performance double roller timing chain and adjustable timing sprocket.
March Performance serpentine ribbed belt type crank/alt/water pump pulleys.
Machine work and assembly of short block by
Hauser Race Cars.
Camshaft
Hughes Engines HTL3742BS solid lifter cam.
Lift = 0.570 intake/0.579 exhaust.
Duration @ 0.050 lift = 237/242 degrees.
Heads
Original type "906" iron castings. Ported at
Hughes Engines to their Stage One spec. Stainless steel one piece valves 2.14" intake and 1.81" exhaust. Three angle valve seats with hardened inserts. Bronze wall valve stem guides. Adjustable aluminium roller tip rockers with 1.6:1 ratio and heavy duty billet hold down clamps.
Induction
Six Pack" 3x2bbl Holleys fed by a Carter 'Strip' mechanical fuel pump and Holley regulator. Carbs are mounted on an
Edelbrock aluminium intake with the heat cross-over passage blocked off.
Centre carb has air horn & choke machined off and the venturies smoothed for better flow. The jet sizes are #65.
Outboard pair (secondaries) modified to accept accelerator pumps, squirters and progressive mechanical linkage. Promax carbs billet metering plates fitted with Holley jets. #84 (front) and #86 (rear).
Exhaust
Dougs headers with 2 inch primaries into 3.5 inch collectors. TTI 3 inch exhaust system with two Dynomax Super Turbo mufflers. System cut into 18 sections and re-welded to fit around overdrive and to include electric cut-outs and a wideband Oxygen sensor for air/fuel ratio monitoring.
Ignition
MSD billet distributor. FBO ECU and coil. Timing set at 24 degrees initial and 34 total @ 3000rpm. Battery re-located to trunk.
Cooling
Be-Cool" custom fit aluminium radiator. High output
Flow Kooler" water pump. 180 degree thermostat modified for better flow. Trans and engine oil coolers.
Summit Racing Electric fan.
Transmission
Numbers matching" Torqueflite automatic mated with
Gear Vendors overdrive unit. Trans rebuilt to street/strip spec with
B&M Transkit. Fitted with a 10" TCS high stall converter, deep oil pan, and temp sender.
Hurst Pistol-Grip" type Quarter Stick shifter fitted into original centre console. Driveshaft safety loop.
Axle
Original 8.75 inch Sure-Grip" axle. Rebuilt with 4.30:1 gears. Effective rear ratio with overdrive engaged is 3.30:1.
Brakes
Original 11x2.5 inch drums on rear. 1976 Police car 11.75 inch discs fitted to front. Strange Engineering light-weight master cylinder. Power assist removed.
Electronic line-lock to front brakes operated from button on top of shifter.
Suspension
Up-rated about 30% all-round with custom made leaf springs at rear (each moved inboard by 0.8 inch) and 1 inch diameter front torsion bars. Polygraphite suspension bushings.
Anti-roll bars are 1 1/8th inch front and ¾ inch rear. Gas shocks.
Steering
Manual steering box with 20:1 fast ratio gearing (4.5 turns lock-to-lock)
Wheels and Tyres
Minilite wheels. 15x8 front. 15x10 rear.
Tyres 245/60 front. 295/50 rear.
Hoosier 28x10 inch slicks for rear when on Drag Strip.
Bodywork and Interior
As original except for;
Wheel lips cut. Plastic front bumper. Painted Hemi Orange". Black vinyl top and black interior fitted. Chassis strengthened with chassis connectors.
Auxiliary gauges fitted in dash for water temp, trans temp and volts.
Monster" tach with remote shift light fitted in dash above steering column. Headlights and turn signals to UK spec.
Interior woodgrain trim replaced with carbon fiber panels. Grant steering wheel.
Performance
Best quarter mile time to date:
11.92
Best quarter mile speed to date:
113mph
Top speed:
145mph
Engine power at crank:
510hp (est.)