Cam to lifters to heads relations

black50 said:

are the lobes in the cam shafting rotating and pushing the lifters up, pushing the pushrods up rising the rocker arm and opening the valve in the head?:

Click to expand...

Basically yes, the timing chain connects the rotation of the cam and crank together, as the lobes of the cam rotate, the lifters which ride on the cam go up or down pushing on the pushrods which open and close the valves via the rockers. Picking the right cam depends on the exact head and intake you have, you can play with the valve timing to make them work better together. The spark plug/ignition fires based on the cam timing (the lobes are made to opena dn close certain cylinders in a particular orde) dist etc..it all works together to create power.



The 5 round journals are where the cam rests inside the cam bearings, the other shapes are more pear like and these are the lobes int/exh that the lifters ride on, the gear meshes with the dist gear...

Rick seems to cover you quite well

Yeah, the crank rotates twice for every one rotation of the camshaft.

So if you are revving to 6,000 rpm, your camshaft is at 3,000 rpm. Makes you wonder why you need billet camshafts for street cars

There are 4 strokes to these engines:

- Power stroke
- Exhaust stroke
- Intake stroke
- Compression stroke

If you would like to read more about it, check out the camshaft valve timing link in my signature. I hope it makes sense to you. It is after the terms dictionary at the beginning.