have you ever two-timed?

[GalvanizedYankee]

Originally posted by: Quixfire

Originally posted by: galvanizedyankee

Originally posted by: Quixfire
It's very hard to do on a SOHC engine, but I guess it could be done on a DOHC engine.

It can and is done on DOHC engines. But if the included valve angle is large, as in the older
hemi-heads. Great care must be taken to insure that the valves clear one another at over-lap.
Even then they can tangle with each other if for any reason they "float". Such as a weak or broke spring, or over reving...........

True, but you must also consider the amount of valve timing overlap to insure your not negatively affecting the cylinder fill rate.

Very true but I have only "two- timed" m/c's and never run em' under 2000 RPM.