How much HP can you get out of a Chevy 307?

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.

Why did Chevy make 307 engines?

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.

What is the bore and stroke of a Chevy 307?

A 307 cu in (5.0 L) version was produced from 1968 through 1973. Engine bore and stroke was 3.876 in × 3.26 in (98.5 mm × 82.8 mm). All 307s had large 2.45-inch (62.2 mm) journals to accept the 327’s crankshaft.

Is a 307 a good motor?

As everyone has said, 307`s are a really great engine, but just never got the “rock star” status of the 327. I had a 307 in my very first vehicle – a 64 Chevy pickup with a 3 on the tree and 3.73 gears.

What kind of engine does a Chevy 307 have?

Jeff Smith: Let’s start with this engine’s configuration. While universally panned, the 307’s layout is really nothing less than a “stroker” 283. A 283 uses a 3.875-inch bore and a 3.00-inch stroke crankshaft.

Are there any limitations to a Chevy 307?

With the physics established, the 307 will respond to all the same techniques that work on any engine to improve performance. The only real limitation to making power is the small bore and this isn’t really that big of a deal.

How big is the cylinder head on a 307?

Cylinder heads are a point of concern on 307s. Although they used common castings often shared with the tamer versions of their 327 and 350 cousins, they were saddled with small (1.72″) intake valves due to their bore size.

How big is the stroke on a 307 crank?

Looking at the bore and stroke specifications, you will see that the 307 comes with a 3.875″ bore and a 3.25″ stroke. What it essentially was, is a 327 crank dropped into a 283 block.