What is the horsepower of a 307 Chevy engine?
Power. When it was introduced in 1968 the 307 was rated at 200 horsepower at 4,600 rpm and 300 foot pounds of torque at 2,400. However, the federal government’s emissions regulations of 1972 saw the 307 de-rated to 115 horsepower.
Which engine is better a 305 or 307?
Premium Member. And if built properly, the 307 will outperform the 305. The bigger bore unshrouds the valves better and the shorter stroke means less piston speed for added durability.
What year did Chevy make a 307 engine?
The Chevy 307 V-8 engine was introduced in 1968 to replace the Chevy 283 V-8. This engine was designed to function well in low-performance vehicles such as sedans and other family-friendly cars. This engine only lasted five years, with the last model being produced in 1973.
Why did Chevy make 307 engines?
Paling in comparison to the weak 262ci (110hp) engine that was introduced later in 1975, the 307, as well as the subsequent 305, was developed in response to increasing federal regulations and a continual consumer demand for better fuel economy.
How do you tell a 305 from a 307?
The Olds 307 has an oil filler tube that sticks up from a small “shelf” on the block directly above the water pump. The valve covers have five bolts (two on top, three on the bottom). The Chevy 305 has an oil fill cap on one valve cover and the covers only have four bolts.
How much horsepower can you get out of a 307?
Combine these parts with a good 600 to 750 cfm Holley carburetor, an HEI distributor, and a set of long-tube headers and your 307 should make around 325 to 350 horsepower, perhaps even a bit more.
Why was the Chevy 409 discontinued?
But in stark contrast to the Methuselah-like life span of the Chevrolet small-block, as early as 1963 it was clear that the 409 had reached the end of its developmental rope, due primarily to shortcomings in the design of its iconic scalloped heads.