fengxzhang

I had my supercharger installed in my lude for a while now. Yet, I still haven't installed my VPAC that came with the kit. Instead I have been using a VAFC to allow me to adjust the fuel curve in addition to set my vtec engagement point.

I know that VPAC uses the stock vtec signal to allow engaugement under the best condition for the engine, ie optimum oil pressure, temperature, engine temperature, rpm, load. And the VPAC work in conjunction with BTC to allow the engine to run stock timing during hi cam engagement. I also know that I may be running on hot cam lobes with only my AFC.

My question is that: am I able to use both the VAFC and the VPAC? I am thinking about disconnecting the VAFC's vtec signal wire while using the VPAC vtec controller. Will I still be able to alter my fuel curves with both units attached? Any conflicts with both? Thanks for your help.

TOFU.man

Do not use a V-AFC every jrsc car that has a V-AFC messes up if you want to control vtec use the VPAC that Jackson Racing sells, or if you want to go with an apex-i product to tune fuel use the S-AFC.

fengxzhang

Are you able to explain why it messes up when I use a vafc?