knocking sound (or pinging) is very hard to describe.
if you can hear a metalic sound or if it sounds like "shaking a can of sand/marbles" or a rattling sound ...when u accelerate your engine, then your engine is knocking.
just doing a survey here. to share do state:
engine :
turbo(if have):
boost pressure(if turbocharged):
management:
Horsepower obtained:
Any additional toyol inside:
(nitrous,methanol/water injection)