wow CNY still GOt TT nice nice ...but at ipoh wor ....i can't go ...
bro7..i go read the fuel addictive botol in a accesories shop....there write to reduce knocking....indeed when we increase the compression mean more squishing when piston TDC. so witout the fuel addictive or compression too high our normal petrol will ignite itself just like diesel did it witout spark....it doesn't happen on TDC...it can happen when on the way to TDC ..so the petrol self ignite and it was not complete combustion as the air fuel mixture is not fully compress....so when it come to actual TDC the spark plug spark and there became the knocking .....i dun know how to express well from typing .....sorry ah .....