1.Intake stroke
2.Compression stroke
3. Explosion stroke ..
4. Exhaust stroke ..

(psstt .. terms maybe wrong ahh dun F me .. i COPY PUNYA) ..

OK now .... WHAT CREATE ENERGY to push the piston DOWNWARDS??

NO.. not the spark plug as everytone thought

The spark plug is just to IGNITE the fuel mixture within the combusion ..
When the fuel ignite .. it create a WAVE .. the WAVE is the energy that pushes the piston downwards ..
Keypoint is the WAVE! not the ignition .. Imagine like a bom ..


Okay .. when the PISTON is on the TOP .. we call it TOP DEAD CENTER(TDC) .. when at the bottom we call it ..  BOTTOM DEAD CENTER (BDC)

you dont ignite the fuel when it is at TDC .. why ??? bcoz the fuel need to burn to create the wave .. @ slight lag ..
so we ignite it BTDC .. BEFORE TOP DEAD CENTER ..

You get max POWER when the fuel mixture burn and complete its burn ngam ngam when the piston reach TDC .. this will cause the wave to have full force power and push the piston downwards ..
if burning too early (the wave fully form) before reach TDC .. it will create Knocking .. the piston cannot return down one .. it must reach TDC before it goes back down .. so the wave and the piston bergaduh .. (knocking)

if ignition too late .. the wave created way ATDC (After Top dead center) .. the wave power not fully utilize (original map)
OKay .. all tat is made for simple understanding .. COPY PUNYA LA DUN ASK ME ..

Okay .. now wat is to do with the timing just now ..
we have dyno and tested to a safe zone where we can create more power for the same amount of fuel without too much stress on it ..
so on a SAME MAP .. if your fuel burn faster .. means u create the wave faster ... so its like an effect of advancing the timing ..
the slower it burn .. means it takes longer time to create the wave form...

Now tat is different from RON meaning ..
RON meaning explain next time .. opss .. copy next time .. Soli ..

bling bling