Is there any benefit to adding an APEXI VAFC unit to a stock car? I understand you can change your VTEC engagement points, but is it really worth it. Guidance, input, anything

 

I would expect the biggest gains in rwhp from a stock car. The gains come from leaning out the fuel mixture, and a stock S is generally going to be running more rich than a modded one. Intakes, headers, and exhausts should lean the mixture a bit, so a V-AFC would be less needed.

 

Sounds logical thanks gernby

 

Actually the more stuff you do to your car the more a VAFC will help you. By adding things to your car it leans things out and changes the dynamics of the engines power. A VAFC will capitalize on the gains from parts.