StephenDc2
RMS Regular
- Messages
- 1,954
Only way to properly set the best crossover point is to get it on a dyno, do a run with crossover set low and a run with it set high, Set the VTEC point to the intersection of the high speed cam and the low speed cam.
I don't know F20's but 4500rpm seems rather low, you may well loose power if its set this low.
Exactly how it's done and how Henry Roy mapped my old ek9.
With bolt-ons when mapped correctly the vtec point on my ek9 was only lowered approx 600rpm and that was the optimal vtec crossover point