Harley Davidson Evolution Compression Ratio

This is in contrast to all previous Harley Davidson engines where the cams were located in the crankcase and drove the valves through pushrods.

Harley davidson evolution compression ratio. 1 Regular 2 Mid Year Intro Date 3 California Models. Performance and Technical information on cylinder heads valves valve sizes valve springs port size port shapes and compression ratios for Harley-Davidson motorcycles. Premium pump gas in the US.

The Evolution engine on the 1340 model has a compression ratio of 851. Harley Davidson Compression Ratio And Cam Timing. Mach Index of Inlet Valves Calculator.

Twelve to one compression ratio and a peak RPM of ninety-five hundred. CA XLH 883 CJ HLH 883 Custom CE XLH 883 Hugger CA XLH 1200 CG XL 1200C Custom CH XL 1200S Sport. The Evolution engines on the 883 1100 and 1200 models each have a compression ratio of 91.

Inlet Runner Design and Torque Peak Calculator. Can be 0 - 9 or X. Generally speaking you should be safe to run 87 octane on a 103ci Twin Cam Harley because its compression ratio is less than 101.

THIS ARE MY HIGH COMPRESSION ISSUES I have gone with wiesco 1051 about 215217 lbs of static compression on the cyls. 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.

Y YORK PA K Kansas City MO. 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. Will generally tolerate corrected compression ratios of.