Harley Davidson Evolution Vs Twin Cam

Essentially the Evo engine has a much more efficient combustion chamber and head design and can produce more horsepower and torque than the TC 88 for a given cylinder volume.

Harley davidson evolution vs twin cam. Lemmy at Revzilla broke down all the improvements on this here. 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. However the TC 88 has a better lifter design.

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. 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. Less rockerbox leaks in the TC due to better designed rockerbox with less parts vs Evo.

Evo v Twin Cam Dyna. Design and development problems. Blockhead 1984-99 All Blockheads have the same displacement of 80 cubic inches.

In the book The Harley Davidson Century edited by Darwin Holstrom Barnes and Noble Press 2005 Steven Anderson detailing the Twin Cam story in the chapter The Twin Cam Era explains the huge development problems Harley-Davidson. And then there is that heat issue. Harley Davidson 5-Speed Transmission EVO BlackChrome 1999 9k miles Softail 999.

1998 Harley Davidson EVO Motor Injected complete with 19k miles 1995. Harley-Davidson Twin Cam 88 and EVOLUTION engines. It is mostly a Shovel with aluminum cylinders and a better combustion chamber.

So if the only thing gained was power the TC is a total fail. 2000 Harley Twin Cam A Touring Mikuni Carb Custom Air Cleaner 14k miles BlackChrome 1995. The new design runs so cool Harleys engineers were able to crank compression as high as 1051.