camshafts

[Boydskyking]

what is the speed of the camshafts to the crankshaft
Thanks

[afterburn 549]

In the old days they were call 1/2 shafts...because of 1/2 the speed

[DSPTurtle]

1/2. You can see this when you time the cam or set lash.

[HawgRyder]

Afterburn...sorry to differ...1/2 shafts are the separate drive shafts going from the transaxle to the rear wheels.
If you want to see a really complicated but wonderful rear drive system...look for De Dion system.
I'm not sure if the Porshe one qualifies..but in my memory the De Dion system was for Track/Camber/Caster all at the same time.
In the older race cars (Ferrari..Maserati...Fiat) you can see the travel of the wheel is held in the same plane throughout the entire travel...no tilt in at the top...etc.
Bob

[911pcars]

Originally Posted by DSPTurtle

1/2. You can see this when you time the cam or set lash.

.... or by observing the distributor shaft/rotor when rotating the crank pulley. Same drive ratio.

Sherwood

[afterburn 549]

Originally Posted by HawgRyder

Afterburn...sorry to differ...1/2 shafts are the separate drive shafts going from the transaxle to the rear wheels.
If you want to see a really complicated but wonderful rear drive system...look for De Dion system.
I'm not sure if the Porshe one qualifies..but in my memory the De Dion system was for Track/Camber/Caster all at the same time.
In the older race cars (Ferrari..Maserati...Fiat) you can see the travel of the wheel is held in the same plane throughout the entire travel...no tilt in at the top...etc.
Bob

The halve shaft term is from the 1930s 40s long B4 front wheel drive was much thought of.
Moot point anyway.
Like said the cam is 1/2 the speed of crank on a "4 stroke" engine because of the exhaust stroke is in the middle. ( or every other stroke) There are two strokes in the world that use cam shafts and fire on every stroke


http://en.wikipedia.org/wiki/Camshaft