Harley Davidson Evolution Compression Ratio
Compression Ratio 891 Horsepower KWhpRPM Torque 793000 lb-ftRPM OR 1073000 NmRPM Fuel System carburetor or Electronic Sequential Port Fuel Injection ESPFI.
Harley davidson evolution compression ratio. Boost Compression Ratio Calculator. This will give the engine a mechanical compression ratio of almost 951. Will generally tolerate corrected compression ratios of.
Wiseco pistons 851 compression ratio Standard 3497 030 Oversize Bore. After looking at the harley web page and seeing the stock compression ratio for the sportsters being only about 891 I have to ask has anyone milled the. The 883 Evolution engine has a maximum horsepower HP of 46 at 6000 rotations per minute RPM and can reach a top speed of 926 miles per hour MPH.
Rake and Trail Calculator. The Evolution engines on the 883 1100 and 1200 models each have a compression ratio of 91. The latter option is preferred in the burgeoning Flat Track series.
Every ounce of power is just a whole lot of fun. Since no compression builds until after the intake valve closes its the corrected compression ratio that gives the best indication of how pump gas friendly your motor will be. As an example it takes roughly a 1551 compression ratio with an aluminum head Evolution engine to match a 141 compression ratio with an Ironhead Sportster.
Cylinder Heads This what a stock EVOLUTION combustion chamber looks like with stock sized valves. Compression Ratio 851 Horsepower 504000 KWhpRPM Torque 693000 lb-ftRPM OR 943000 NmRPM Fuel System carburetor. While much of Harleys range is based around the 1340cc 8174ci so-called Big Twin Evolution engine unit the company has produced a unit for the Sportster range based around a unit construction engine.
This is in contrast to all previous Harley Davidson engines where the cams were located in the crankcase and drove the valves through pushrods. Includes 2 forged pistons rings pins and snap rings for Harley Davidson Big Twin Evolution 80ci 1340cc 1984 - 1999. Generally speaking you should be safe to run 87 octane on a 103ci Twin Cam Harley because its compression ratio is less than 101.
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