SilverT

I have an idea of what it does but how helpful is it and is it worth it?
thanks

tranceminister

Well, you can switch where your vtec engages and disengages, and if you ever plan on going turbo, you could use the VAFC as a possible way to control 450 cc injectors.

stretch-d

It depends on you chosen set-up. If your going stand alone I don't think you need it.


The hack is a less expensive way of controlling the A/F & VETEC crossover.

OnYx

I use it to raise my VTEC so i can get decent gas milage (80 MPH = 5500 RPM)

SilverT

ok but what if I am doing an cold air intake, header, and exhaust in the meantime. will it help, horsepower wise or not or what are the advantages?

SilverT

or what happens if I change the cams?

stretch-d

Definetly worth it for that set-up.

It will provide useful adjustability.

SilverT

ok but i checked apexi website and it says to have a professional install it and tune it. is it possible to do it on my own? i mean i do all work on my cars, always have, have rebuilt engines and done a homemade turbo but I am curios about the tuning part of the vafc.
thanks

tranceminister

the tuning part is a snap man. yeah you can do it yourself. read up in the engine management section. I beleive theres some good info there about settings and wiring etc. And if you've got any more specific questions ask. Thats what we're here for.

hackish

Unfortunately a lot of these tuning hacks work but not all that well. Reason being - the ECU also controls ignition timing. In my opinion it's far better to have your ECU converted to run vtec. This way you have a specific and tuneable vtec map that covers timing and fuel. Of course I'm biased because I make money from converting and chipping ECUs.

-Michael