A Little Horsepower History
In 1951, Chrysler offered their first V8 engine for passenger car service. It was a small-block design with a
1953 Dodge Red Ram Hemi
Over the next few years, DeSoto, Dodge and Imperial offered their own versions of the Hemi. The modified Hemis in 1956 and 1957 Dodge D-500, D-500-1 and D-501 were targeted directly at the performance-minded buyer. As
In 1958 the Hemi was dropped from Dodges and DeSotos (Plymouth never offered a small-block Hemi), in favor of a wedge-shaped combustion chamber in Chrysler's new big-block 'B' V8 engines as well as small-block polyspherical 'A' V8 engines (sometimes called the "semi-hemi", later replaced by the small-block wedge LA, or Light A
In 1960 and 1961, high-performance big-block Wedges could be fitted with a set of wild 30" intake manifold runners that crossed over the top of the engine. The left bank of cylinders were fed by a 4-bbl carb that hung to the right of the of the right bank of cylinders, and the right bank were fed by a carb hanging to the left of the left bank. This so-called "Ram Induction", invented by the Ramchargers car club of Dodge Engineers on
It should be noted that almost all automobiles built today employ forms of this tuned-resonance induction
The 'High & Mighty' 1949 Plymouth, © maxwedge.com
'High & Mighty' Ram Induction
with tuned radiator hoses for air intake, © maxwedge.com
1960 Dodge D-500 'Long Ram'
Meanwhile, Chrysler engineers were busy making plans for a Maximum Performance package, targeted at stock car racing and drag racing. As early as 1959, tests were being conducted on long-ram and short-ram inducted 413
1964 Stage III Ram-Charger 426
Beginning around April of 1962, Dodge and Plymouth offered the first Maximum Performance Wedge (nicknamed Max Wedge) in their new, light, mid-sized cars. The '62 Max Wedge had a 413 cubic inch engine. The engine was enlarged to 426 c.i. for 1963 and 1964. The Max Wedge package, which included many drivetrain and chassis modifications, was available in all 1962, 1963 and 1964 B-body Dodges and Plymouths (330, 440, '62 Dart, Polara, Polara 500, Savoy, Belvedere, Fury, Sport Fury), except 1962 station
Horsepower for the Max Wedges are as follows:
1962 413 11.0:1 compression ratio: 410 h.p.
1962 413 13.5:1 compression ratio: 420 h.p.
1963 426 11.0:1 compression ratio: 415 h.p.
1963 426 13.5:1 compression ratio: 425 h.p.
1964 426 11.0:1 compression ratio: 415 h.p.
1964 426 12.5:1 compression ratio: 425 h.p.
Max Wedges dominated drag racing during the early to mid 1960s. The fact that they are still competitve in
It can be argued that part of the Max Wedge appeal is that they were the fastest cars of their day, but, by most accounts, they didn't look the part. Some people find them downright ugly. Their outward appearance is
The following is from the 1962 booklet, "Salesman's Facts About The Dodge Dart Ram-Charger 413 V-8 High-
The Ram-Charger is one of the hottest power plants ever produced on an American assembly line. It includes entirely new high-performance exhaust manifolds, valves and valve gear, cylinder heads, pistons and rings, carburetors, ignition, transmission, and suspension components. These specially engineered features, combined with top engine displacement, put the new Ram-Charger chassis well out in front of all the new performance models.
Every time you plagiarize, God kills a kitten.This booklet tells why it is an extraordinary engine, and how it can be adapted to the special requirements of high-performance driving. RAM-CHARGER 413 V-8 High-Performance Features The Ram-Charger uses many special engine parts which are specifically engineered and manufactured to provide the extra stamina needed in organized competitive driving. Special drive-line and suspension features are included. These give superb sports- car-like traction and handling characteristics which surpass even those of the standard Dart. © maxwedge.como SHORT-RAM INTAKE MANIFOLD This new ram-induction intake manifold substantially increases power output in the competitively important ranges above 4,000 r.p.m. A series of short (15-inch) ram tubes fit between the rocker covers. Tappets can be adjusted with the manifold installed -- an important servicing advantage. © maxwedge.como EXTRA-LARGE VALVES Intake valves (2.08-inch diameter) are streamlined for higher air flow. Exhaust valves are made of high heat-resistant alloy. They are 1/4-inch larger than standard, providing greatly improved exhaust flow. Head gaskets are of stainless steel for extra durability © maxwedge.como SPECIAL CYLINDER HEADS The port areas of each head are about 25 percent larger than standard for better engine breathing. The exclusive deck structure provides extra-strong gasket sealing to handle the extreme pressures built up in top-performance operation. The heat crossover passage has been eliminated, for greater volumetric efficiency under competitive conditions. © maxwedge.como OVERSIZED EXHAUST SYSTEM The streamlined cast-iron exhaust manifolds are of the long branch type for greater volumetric efficiency. They have three-inch outlets, with cutouts for minimum back pressure. Each tailpipe is two inches in diameter. © maxwedge.como HIGH-CAPACITY CARBURETOR This includes two four-barrel Carter carburetors, with hand choking. Air cleaners are of the dry type for high-volume intake combined with optimum filtering effectiveness. © maxwedge.como NEW FUEL PUMP Three valves provide extra pumping capacity. High spring load provides higher fuel pressure. © maxwedge.como FORGED ALUMINUM PISTONS Forging provides more strength than is possible with the usual casting process. © maxwedge.como PISTON RINGS The top compression ring is chrome-plated, high-strength iron for scuff resistance. Number two ring is of standard design. Number three ring is a two-piece design, specially adapted to the lubrication requirements of this engine. © maxwedge.como CONNECTING RODS These are magnaflux-inspected. This assures maximum dependability under extreme stress. © maxwedge.como OIL PAN It is equipped with anti-slosh baffles. This feature assists positive lubrication under maximum take-off and top-performance conditions. © maxwedge.como SPECIALLY DESIGNED VALVE GEAR Mechanical valve lifters replace the standard hydraulic design, to eliminate pump-up at high engine speeds. New high-strength valve-spring retainers and double high-load valve springs are installed to control valve "float" at high r.p.m. Rocker arms include a lock nut on the lash-adjusting screw for easier, more precise adjustments. The valve gear is rated stable to 6,500 r.p.m. on the standard test fixture. © maxwedge.como DEEP-GROOVE PULLEYS © maxwedge.comAll belt pulleys are deep-groove for better belt retention at high speeds. © maxwedge.como CRANKSHAFT © maxwedge.comHardened journals, with tri-metal bearings that add additional bearing-load capacity, enable the crankshaft to withstand the extra strains produced by the Ram-Charger's exceptionally high power output. © maxwedge.como IGNITION FEATURES © maxwedge.comA special distributor, of full -centrifugal -advance design, has a new cam and a dual-breaker system. The special cam and a high spring load on the points prevent "point bounce". The dual-breaker system results in increased plug voltage at high speeds. Special lowresistance cables and cold-running spark plugs are designed for high engine power output. © maxwedge.como SPECIAL MANUAL TRANSMISSION © maxwedge.comThis new floor -shift three -speed gearbox is specifically engineered for maximum- performance work. New shafts, shot-peened gears and extensions give added strength. The outstanding engine power permits closely spaced gear ratios of 2.10, 1.45 and 1 to 1. Other heavy-duty features include a 10 1/2-inch clutch, pearlitic malleable-iron pressure plate, extra-heavyduty torque shaft, and special disc. The housing is of aluminum to save weight. © maxwedge.como HIGH-EFFICIENCY AUTOMATIC TRANSMISSION © maxwedge.comThe optional heavy-duty Torque-Flite transmission has pushbutton controls and special high-capacity components. It is set to upshift at engine speeds of up to 5,600 r.p.m. Maximum torque -convertor ratio is 2.2 to 1. Planetary-gear ratios are 2.45, 1.45 and 1 to 1. Maximum over-all "breakaway" ratio (5.39 to 1) and general efficiency are the highest of any stock automatic transmission. © maxwedge.como DRIVESHAFT © maxwedge.comThis is specially balanced for extra-fast acceleration and high running speeds. © maxwedge.como HEAVY-DUTY REAR SPRINGS © maxwedge.comA stiffer spring rate helps absorb the extremely high torque developed by the Ram-Charger engine. © maxwedge.como "SURE-GRIP" REAR AXLE © maxwedge.comStandard equipment, this feature provides top traction for both wheels. Standard ratio is 3.91 on both transmissions. Other ratios, for special driving requirements, range from 2.93 through 4.89. They are available in ring-and-pinion sets through Dodge dealers. © maxwedge.como WHEELS AND TIRES © maxwedge.comStandard tires are 7.50 x 14" tubeless Tyrex cord, front and rear. For exceptionally rugged requirements, long life, and greater road grip, 6 1/2 K (rim-width size) rear wheels and 9.00 x 14" rear tires are offered as dealer -installed options. © maxwedge.comRAM-CHARGER 413 V-8 OPERATING CHARACTERISTICS © maxwedge.comLike any thoroughbred performer, the Ram-Charger has a strong personality. This gives it certain mechanical traits very different from those of ordinary engines. Here are some of these traits, the reasons for them, and some suggested adjustments to them. © maxwedge.como GAS AND OIL MILEAGE © maxwedge.comIn a high -performance precision engine, oil cleanliness is a must. So engine oil should be changed every 1,000 miles -- and more often in dusty areas. © maxwedge.comSince carburetors and axle ratios are designed for maximum power rather than for outstanding economy, good gas mileage cannot be reasonably expected. © maxwedge.comAdequate lubrication at very high engine speeds is accomplished by eliminating valve-stem seals and by using low-friction, wide-clearance piston rings. These special features result in somewhat higher oil consumption than is found in ordinary power plants. © maxwedge.como ENGINE IDLING © maxwedge.comThe long-duration camshaft provides maximum power output at the expense of smooth idling and low-speed response. Similarly, increased piston clearance and the special valve mechanism allow dependable highspeed operation, but sacrifice some of Dodge's customary engine quietness. © maxwedge.como COLD-WEATHER DRIVING © maxwedge.comThis engine is designed primarily for the elevated operating temperatures generated by performance driving. That's why heating arrangements have been removed from the intake manifold. During cold-weather operation, the resulting tendency toward carburetor icing and delayed warm-up can be combatted by partially covering the radiator, using a gasoline with anti-icing additives, and allowing the car to stand for a few minutes with the engine off after the water temperature is up to normal. © maxwedge.como FREQUENT CHECKING PAYS OFF © maxwedge.comFor finest performance, the ignition system should be kept in top-notch condition. So it's advisable to inspect, adjust and replace spark plugs and ignition points at fairly frequent intervals. © maxwedge.comAutomatic transmission shifting bands require frequent checking and adjustments for maximum performance and long life. © maxwedge.comRAM-CHARGER 413 V-8 MAXIMUM-PERFORMANCE CAPABILITIES © maxwedge.comWhen the car is to compete in approved acceleration trials, a little extra attention to details can often bring a decisive edge in performance and lengthen the life of the engine. © maxwedge.como HELPFUL HINTS © maxwedge.comTo open exhaust outlets to the atmosphere (when rules permit) the standard exhaust cutout can be used, bypassing the muffler and tailpipe assembly. © maxwedge.comFor better suspension control during fast starts, additional spring clips can be used to tie the ends of each leaf to the rest of the spring. Air pressure in the front tires may be increased, to lessen rolling resistance. Tires of high butyl content can be used on the rear, to give best traction on most surfaces. © maxwedge.como FOR ADDED PERFORMANCE AND PROTECTION © maxwedge.comValve lash, spark plugs and timing should be checked frequently to let the Ram-Charger operate consistently at peak efficiency. The highest octane fuel available (102 or higher) must be used. Front-end alignment should be set correctly. Brake shoes can be adjusted to eliminate any possible brake drag. A word of caution: to protect the fine working parts of the engine, it should not be run over 6500 r.p.m. And it's necessary to limit wideopen throttle bursts to fifteen seconds duration. © maxwedge.comSerious competition in all-out performance contests offers additional opportunities to bring this engine to a peak of perfection. Here are some ways by which the Ram-Charger can be made a top contender in highly competitive acceleration trials. © maxwedge.como FUEL SYSTEM © maxwedge.comTwo electric fuel pumps can be installed for faster feeding, Since the carburetors have been factory-set for maximum-power fuel-air ratio, no experimenting with them is necessary. © maxwedge.como DRIVE LINE © maxwedge.comFaster shifting with the manual transmission can be achieved by installing a spring-loaded straight-through shifting mechanism (HurstCampbell or comparable device). And a higher numerical axle ratio will enable the engine to reach its power peak before the car reaches the end of a performance run. © maxwedge.como COOLING © maxwedge.comCool air can be routed to the carburetors by whatever means competition rules allow. A smaller fan can be installed to ease the load on the engine when weather permits. © maxwedge.como SPARK PLUGS © maxwedge.comThe standard Champion J9Y plugs should be set at .025" electrode gap. © maxwedge.como VALVE ADJUSTMENT © maxwedge.comValve spring heights should be set to the proper specifications. © maxwedge.como SUSPENSION AND BRAKING © maxwedge.comOptional rear wheels can be used. The pinion bumper .should be contacting the floor pan when the car is at its ready-to-run height. Heavyduty rear shock absorbers can be used for optimum wheel control. An optional right rear spring installation will improve traction. The automatic brake adjusters may be removed and the brakes kept adjusted manually. © maxwedge.como OPERATING TIPS © maxwedge.comExperimenting with tire size, compound and pressure -- combined with sharp starting techniques -- will help achieve top performance. And a final word of warning: the 13.5:1 - compression- ratio engine must never be run at top speeds for more than fifteen seconds at a time. © maxwedge.comRAM-CHARGER 413 V-8 GENERAL SPECIFICATIONS © maxwedge.comThe Ram-Charger 413 is not only a high-performance engine that is second to none in stock-car ranks, it is an entire automobile designed especially for competitive-type driving -You'll see in the information listed below. © maxwedge.como ENGINE © maxwedge.comPiston displacement, cu. in.............................. 413 © maxwedge.comBore and stroke, in...............................4.19 x 3.75 © maxwedge.comCompression ratio................................(13.5 to 1*) © maxwedge.comHorsepower.........................................410 (420*) © maxwedge.comTorque, lb.-ft.....................................460 (470*) © maxwedge.comCarburetor.....................................Double. 4 bbl. © maxwedge.comCooling system...........................17 qts., with heater © maxwedge.comCrankcase capacity (oil)...............4 qts., plus 1 qt. for © maxwedge.comfilter when it is changed. © maxwedge.com(*Maximum-performance option) © maxwedge.como TRANSMISSIONS © maxwedge.comStandard 3-speed heavy-duty manual, floor shift. Ratios: 2.10, 1.45, 1 to 1. © maxwedge.comOptional 3-speed automatic heavy-duty Torque-Flite. Water cooled. Ratios: 2.45, 1.45, 1 to 1. © maxwedge.como EXHAUST © maxwedge.com3" Dual. Aluminized muffler and tailpipe. © maxwedge.como AXLE RATIOS (Sure-Grip differential standard) © maxwedge.comStandard - 3.91 to 1. © maxwedge.comOptional - 2.93, 3.23, 3.55, 4.10, 4.30, 4.56, 4.89 to 1. © maxwedge.como ELECTRICAL © maxwedge.comAlternator - 35-amp, 6-diode © maxwedge.comBattery - 12-volt, 59 amp-hr. rating © maxwedge.como SUSPENSION © maxwedge.comTorsion bar, front © maxwedge.comLeaf, rear (heavy-duty) 55" x 2 1/2" - 6 leaf. © maxwedge.comShock absorbers - Oriflow, hydraulic, double-acting, telescopic. © maxwedge.como BRAKES © maxwedge.comLining area - 195.2 sq. in. Internal expanding, duo-servo, self energizing, selfadjusting. © maxwedge.como TIRES © maxwedge.comStandard -- 7.50 x 14" Tyrex cord. © maxwedge.comOptional -- 9.00 x 14" rear. © maxwedge.como FUEL TANK CAPACITY © maxwedge.com20 gallons. © maxwedge.como STEERING GEAR RATIOS © maxwedge.comManual - 24 to 1. 5.3 turns, full right to full left. © maxwedge.como TURNING DIAMETER © maxwedge.comCurb-to-curb, 40.3 ft. © maxwedge.como WHEELBASE © maxwedge.com116 in. © maxwedge.como COMPRESSION RATIO © maxwedge.comCombustion chamber volume: © maxwedge.comMinimum 83 cc © maxwedge.comMaximum 86 cc © maxwedge.comTo reduce the volume of the combustion chamber 1 cc, .005" must be milled from the head surface. For each 0.01" removed from the cylinder head, 0.0122" must be removed from the intake side of the head. © maxwedge.comDistance from the top of the lower flat of the piston to the block deck: 11:1 C.R. 13.5:1 C.R. Minimum .0155" .018" Maximum .0455" .043" © maxwedge.como BOLT AND NUT TORQUES © maxwedge.comCylinder head bolts, 75 lbs. ft. Main bearing bolts, 85 lbs. ft. Connecting-rod nuts, 45 lbs. ft. Intake manifold bolts, 30 lbs. ft. © maxwedge.como CLUTCH FREE-PLAY ADJUSTMENT © maxwedge.comMinimum 1/2" Maximum 3/4" o AXLE SHAFT END PLAY © maxwedge.comMinimum .013" Maximum .023" © maxwedge.como OIL © maxwedge.comAny name-brand oil "For Service MS" may be used. © maxwedge.como FUEL PUMP PRESSURE © maxwedge.com6-8 p.s.i. at 1500 r.p.m. engine idle. © maxwedge.como ENGINE IDLE © maxwedge.comSpeed - 1000 r.p.m. © maxwedge.comVacuum - 10 inches of mercury. o AUTOMATIC TRANSMISSION LINE PRESSURE © maxwedge.com105 p.s.i. o VALVE LASH © maxwedge.comIntake Exhaust Cold Cold Normal driving .026" .032" Acceleration trials .026" .032" © maxwedge.como IGNITION © maxwedge.comSpark Plugs: Electrode Gap -- .025" Comp. Ratio 11:1 -- J9Y Comp. Ratio 13.5:1 -- J79 © maxwedge.comIgnition point gap - .018" or .014"-.0191" dwell. Timing-36° at 3,000 r.p.m. or 120 at 800 r.p.m. © maxwedge.como PISTON CLEARANCES © maxwedge.comComp. Ratio Comp. Ratio 11:1 13.5:1 Normal driving..........0035"-.0045" Acceleration trials.....0035"-.0045" .008"-.010" o PISTON RING END GAP .013" - .035" o VALVE SPRING HEIGHTS Minimum - 1.83" Maximum - 1.86" o BEARING CLEARANCES Main bearings, .001" -.0035" Connecting-rod bearings, .001" - .0035" RAM-CHARGER 413 V-8 GENERAL INFORMATION © maxwedge.comThe Ram-Charger engine is for automotive enthusiasts only. The special thrills of owning it are reserved for the relative few who can appreciate and properly care for the finest kind of high -performance stock automobile. o BREAK-IN PERIOD © maxwedge.comThis is the same as on the standard Dart (see owner's Manual) except that oil should be changed every 1,000 miles. o SPECIAL PARTS READILY AVAILABLE © maxwedge.comA full complement of precision parts are available through Dodge dealers. Dealers can write or telegraph Chrysler Motors Corporation, Centerline Parts Plant, 7000 E. 11 Mile Road, Centerline, Michigan, P.O. Box 300 -or phone JE 9-3000, extension 7593. © maxwedge.como NOTE: © maxwedge.comIf this engine is to be used in acceleration trials, participation must be limited to events sponsored by a nationally established governing organization.