Which valves/pistons move faster as the car is excelerated?

Is this a trick question?

--
Don Foster (near Cape Cod, MA)

Not at all! I'm trying to figure out if the knocking that rocked my car and would cause it to cut off when I came to a stop, unless I put the car in neutral, is something that I can repair or if it's indicating an engine overhaul--or worse.

Are you valves adjusted correctly ? Knock sensor can react to excessive valve noise and retard your timing.

Just a thought.

twoforty

How's your base idle? If it is too slow even the slight drag caused by the trans in gear will cause the car to stall.

As to which moves faster valve or piston? I'd say piston as it travels a further distance per rev than the valve.

Which piston moves faster? My guess would be piston #1 as it is always leading (ie. at the front of the engine), when the car is going forward. (If it were slower the other pistons would catch up and pass it.)
--
1980 245 Canadian B21A with SU carb and M46 trans

Interesting question.

Velocity wise, I would say the valves....in that they have a shorter distance to travel than the piston. However, each valve should only cycle once every forth cycle of the piston. The piston has a further distance to travel, and is in constant motion, whereas the valves are at rest (for a brief period) during three of the pistons cycles.

I'm sure there are those out there who can figure the exact time it takes for a piston and it's valve to function, and be able to mathamatically come up with the ration of speeds as to RPM's. Not me.

Just my thought.

twoforty

Yes, they do move faster when accelerating and when car reaches 30mph they match car speed exactly.
--
David Hunter

Which they, the valves or the pistons?

The car, the valves, the piston all move at 3o mph exactly.
--
David Hunter

All of them.

--Joe HC
--
1977 244 160k (?), 1988 245 214k (soon to be dismissed), 1990 244 102k, 1978 Fiat 124 Spyder (restoring)

the ones in the engine do.