Harley Davidson Evolution Compression

This what a stock EVOLUTION combustion chamber looks like with stock sized valves.

Harley davidson evolution compression. Also their high-temperature resistant knobs are charcoal colored for a. Trending price is based on prices over last 90 days. Kirby is in FLorida.

The 1100 Evolution engine has a predictably higher maximum HP of 50 at 5500 RPM with a top speed of 1019 MPH. Keith Black pistons kit dome top 951 compression standard bore for Harley Davidson Big Twin Evolution 80ci 1340cc. 1340 FORGED PISTONS - 1051 010.

Air-cooled Evolution Displacement 883 cm3 Bore X Stroke 30x38 in OR 76 mm Compression Ratio 881 Horsepower 536000 KWhpRPM Torque 494100 lb-ftRPM OR. The engine isnt built full tilt. Back in 90s the fuel would tolerate more spark advance more compression and higher cylinder temps before problems would appear.

I would guess the average stock EVO maybe has 150 psi of compression. Harley Davidson Evo Big Twins are notorious for cranking problems. This is considered the minimum compression ratio needed to make serious power from a.

When the engine is assembled use one of the 030 inch thickness head gaskets instead of the normal 040 or 060 inch gaskets. 50 out of 5 stars. Air-cooled Evolution Displacement 1200 cm3 Bore X Stroke 35x38 in OR 89 mm Compression Ratio 901 Horsepower 615500 KWhpRPM Torque 654000 lb.

The larger 1340 Evolution engine has a maximum HP of 58 at 5000 RPM and a top speed of 1025 MPH. High performance valve and valvetrain components for harley-davidson evolution. The engine is a SS-based Harley-Davidson Evolution V-Twin and is going to be in a Fast Bracket Race drag bike.