slightly richer is how much ?? higher idle and A/F ratio ?
i tested my fren's car with jun 3 cam & supertech piston....car idling set at about 1000rpm and very stable cos use power FC, tuning quite good, car very responsive like ready to go on gas pedal but rpm idling i feel on high side..his car tune in sgp using ron98, gets about 400km full tank on EK4.
So i do not know how his car will react if feed with ron97 or v power racing cos i know sgp ron 98 is more better petrol than ron97....is there a lot of difference ??