Harley Davidson Evolution Vs Twin Cam

Lemmy at Revzilla broke down all the improvements on this here.

Harley davidson evolution vs twin cam. Fallingoff Sep 22 2013. They are also called Evolution or Evo. Add that to an 8-valve engine with a 55mm throttle body flowing 50 more air than the Twin Cam and they were able to crank a lot more power out of the new engine.

The larger Evolution engine however was replaced by the Twin Cam 88 engine in 1999. The Evolution engine is an air-cooled 45-degree V-twin engine manufactured from 1984 by Harley-Davidson for the companys motorcycles. Harley Evo vs Twin Cam Engine Systems Similarity.

This engine is not to be confused with the Sportster Evo same name different engine Twin Cam 1999-present There are 88-ci 96-ci 103-ci and 110-ci versions. The obvious thing is they are both manufactured by Harley Davidson. I am looking for a drop in cam without needing to alter the valve springs.

Its also a much larger displacement. Only the Twin-Cam has the crank-case to trans interface. The EVO had plenty for what it went into.

Looking at the differences between the new Milwaukee 8 Engine from Harley Davidson with the old Twin Cam you begin to see just where the improvements where HD focused in on. Most importantly the Evo and Twin Cam engines. It has the same basic one cam design the same layout of the breathing and oiling it is just an evolution of the design of the founders.

The small Evolution engine permanently replaced the Ironhead engine and as of November 2010 is still being produced by the Harley-Davidson motorcycle company. The engine design is often credited with saving Harley-Davidson from bankruptcy after the management buyout and subsequent reorganization that the company went through during the early 1980s. Evo v Twin Cam Dyna.