i have got a jap spec chip to my gti-r and timing is a bit high, even for 98 octane fuel.just would like to see if by adding a good octane booster i can prevent pinking.
i have tried a few, including the bardhal racing formula.this one works good, but wery expensive!!have heard that NOS and JUSTICE BROTHERS octane booster are wery good.
i will probably buy them in the usa....
will let you know if you are intrested