350 HP. They rated the standard issue 455 at 350 HP and the high-performance stage I version at 360 HP. This engine had a short run starting in 1970. In 1975 General Motors started using the same engines across the different divisions and platforms. How much HP does a 455 Read more…
The 1968 Thunderbird saw the introduction of the new 385 series big-block “Thunder Jet” 4V (4 barrel carburetor) 429 cu in (7.0 L) V8 engines. Like many Ford engines of the time, they were conservatively rated at 360 hp (268 kW) (SAE gross). How much did a 1969 Thunderbird weigh? Read more…
Performance cams increase the duration and timing of the valve openings during the engine stroke, increasing horsepower and making your car accelerate more quickly. Does a cam make more horsepower? Yes. Adjusting the camshafts so the cams are slightly ahead or behind will alter the engine’s performance. Advancing the timing Read more…
The 302 V-8 is rated at 290 horsepower, which only hints at what really is buried in there. Only a four-speed gearbox can be had on a Boss 302, but there are two different gear sets possible and one is better than the other for street driving. How much HP Read more…
290 hp. Ford rates the output at 290 hp (same as the Z/28) @ 5800 rpm, and no one will dispute that it makes at least that much. Standard with the engine is a wide ratio (2.78 first gear) transmission and a 3.50 axle, which strikes us as an ideal Read more…
Run naturally aspirated, the 383 produced 550.2 horsepower and 491 lb-ft of torque. After installation of the Weiand 177 and single 950 CFM carburetor, the supercharged combination thumped out 645 horsepower at just 6 psi. How much horsepower does a supercharged 383 stroker have? Best Use Horsepower: 600 Torque: 550 Read more…
The 454 cu in (7.4 L) LS-4 big-block V8 engine was introduced in 1973 to replace the LS-5. It delivered 275 hp (205 kW) and 15% of the cars were ordered so equipped. “454” emblems adorned the hood of big-block equipped Corvettes. How much horsepower does a 1970 454 Corvette Read more…
A 1974 Stingray equipped with the L48 195 hp (145 kW) small-block was capable of 0-60 mph in 6.8 seconds; comparable to the 6.5 second time of the 1968 small-block rated at 300 hp (224 kW); proof the 1972-74 Corvette engines had ample power regardless of reduced horsepower and net Read more…
390 @ 4800. 1970 Chevrolet 454 Corvette Chevrolet 454 Corvette PRICE Displacement, cc/cu in 7440/454 Compression ratio 10.25:1 Bhp @ rpm 390 @ 4800 How fast was a 1970 454 Corvette? With a maximum top speed of 152 mph (245 km/h), a curb weight of 3300 lbs (1497 kgs), the Read more…
330 horsepower. Very Capable Engines Meanwhile, the Firebird 400 Coupe was rated 330 horsepower at 4800 rpm and 430 pound-feet of torque at 3300 rpm. Variations in the so-called “W66” 400 cu-in engine included the L74 that was rated at 335 horsepower at 5000 rpm with 430 pound-feet of torque Read more…