Ahmed,
Look like u got upset on wat i wrote, first of all its A3 not civic 1.5T jiska ka knocking zaroori nahi same ho i know coz i m telling from my personal experienced and tuning many cars from last 15 yrs. He had no clue about knocking issue until i drove his car also he took his car next day to Audi workshop where i spoke to mechanic and he told me there was too much carbon on his spark plugs. Khair i know 2 guys in Punjab one in lhr and one in Isb they all had check with civic 1.5T and the results was A3 1.8T won even on quartermile let alone race upto 200kph. That why i asked u to re-raced but u kept saying tht my friends is making excuses coz he has lost, which i ageed he lost but why are u getting frustrated and keep asking 100 questions like his car is perfectly fine or tune. If u dont want to race then say "no" itne lambi story likhne ke zaroorat nahi.
i got 17inch with dunlop dirrezza and friends got stock rims, FYI tires wont do big difference unless u r fully modded. We tried drag and roll-on races 6 times. Like i said before drag races usually end at the quartermile A3 and civic 1.5T speed is around 150-160kph not 200+kph. Not all luxury car is fast as civic 1.5T as u know i have beaten merc E250cgi as well 
P.S my civic 1.5T is also knocking not from sudden accelerate but on low rpm like 2-3k rpm