Hey Dessy, saw this in the feed haha. Will reply to your other post when at home later.
What camming refers to is altering or changing the cam shaft in your engine. The cam shaft is what controls the intake and exhaust valves, the timing of when they open and close in relation to the crank angle and the duration they are open.
If you have a standard CAM shaft you can potentially adjust the timing of the cam shaft by advancing it or retarding it in relation to the crank angle. Advancing opens the intake earlier allowing more air to initially flow into the cylinder, increasing low end torque and power. Retarding delays the opening and closing of the intake valve, this is more beneficial at higher rpm when induction pressure increases, resulting in more power at higher rpm.
You can ofc buy uprated cams, which change the duration or lift of the valves.
Duration is the period of time the valve is open for in relation to the crank angle. An uprated cam shaft will have increased duration, this allows more air into the cylinder, and thus increases power that can be created. However valve clearance has to be considered.
High lift cams use higher cam lobes which allow the valve to open more, effectively letting more air in, but in reality a standard lobe with a longer duration will produce more power through the rev range.
Both have disadvantages, they both produce valve overlap, this is where the exhaust and intake valves are open at the same time, causing a rough idle at low rpm, (like old school race cars). Thus sacrificing low rpm torque for higher power at higher rpm.
Ofc both cams must be set up correctly to ensure valve to piston crown clearance. However high lift cams at high rpms can cause valve bounce. This is where the valve springs can not keep up with the valves causing the valve to not follow the cam lobe profile causing engine failure. This only happens with over revving an engine more than its designed. This can be solved however with higher compression springs.
You can see a rather noticeable difference in power figures and engine response with the correct cams.
Dont confused cam timing with ignition timing though, that however will need to be adjusted to suit your cams.
I don't know a lot about cams but hope that helps.
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