Quote:
Originally Posted by thomason2wheels
Would the engine even start and run with the intake cam retarded that much?  |
Camshaft sprockets are usually 36 tooth so a teeth sprocket delay is 10°.
The inlet advance before top end center is usually 30° and delay after bottom end is 50° ish.
Atkinson timing engine as seen in a Prius is 15° to 0° advance and 90° to 105° delay, thanks to a cam phaser.
That being said, there is a thread in the Motorcycle section wich name is "Atkinsoning motorbike engine" where one guy tried a one teeth delay on a big Kawi engine to no avail and the conclusion was the carbs can't cope with back flowing, which is the whole idea of the Atkinson cycle.
So far it is just a maybe that an injected engine would do better in this respect ...