Question about intake /exhaust air flow capacity versus power output of engine

[H2Okie]

I am a novice on this subject but was wondering about this the other day .
If the CFM of air flow thru and engine combined with the fuel delivery curve is responsible for just how much power is possible a limiting factor would be anything that is responsible for the greatest restriction against the air flow thru the engine . Would it be typical to have all of the intake and exhaust components equally matched for flow capacity so there are no bottle necks in air /exhaust flow through the engine ?

[Motv18]

Piston velocity is one limiter. The closer to supersonic speed the greater the force to accelerate it faster and if it goes supersonic and survives then 4 times the force is needed to maintain or accelerate even more.

Exhaust is typically 80% of intake. That has to do with momentum and other physics. And some chemistry that exhaust left aids in power.

Proper control of the burn rate through ignition advance also plays a part. On some engines you can gain 5 hp on a dyno per degree.

But yes generally more air more fuel more power.

[FORBESAUTO]

You are correct in the fact that the ability of the exaust to transfer the spent gases equally in proportion to the ability of the intake to deliver the air fuel mixture. But it’s not in a 1-1 ratio, the exhaust is generally smaller but can still transfer all the spent gases. The reason for this is mainly the pressure differential between cylinder pressure and atmospheric pressure during the exhaust stroke and intake strokes. The greater differential of pressures on the exhaust stroke cause the velocity of exchange to be much greater, allowing the exhaust to adequately scavange the spent gases using a smaller area than the intake. It’s a littke more involved than this, but for simplicity gets the idea across. But yes, you need to try and keep the ratio between the intake tract and exhaust tract in correct proportion to make as much power as possible.

[H2Okie]

Piston velocity is one limiter. The closer to supersonic speed the greater the force to accelerate it faster and if it goes supersonic and survives then 4 times the force is needed to maintain or accelerate even more.

Exhaust is typically 80% of intake. That has to do with momentum and other physics. And some chemistry that exhaust left aids in power.

Proper control of the burn rate through ignition advance also plays a part. On some engines you can gain 5 hp on a dyno per degree.

But yes generally more air more fuel more power.

Thanks for the responses guys that is some good info...