Hi, I have a untuned vafc2 installed in my 99 jdm ap1 with I/H/E. Is it safe to lower vtec to 5600rpm with no other adjustments to the fuel? If so what vtec control & match settings do you guys recommend on the vafc.

Searched already but still no definite answer.

Thanks!

 

I have lowered vtec to 5500 with similar mods. Watching with wideband it is still rich. I haven't touched fuel yet. My00.