how many hp i will get from them? or they are just useless to a low hp car like my ex.?
thanks!

 

If you are willing to dyno tune your car, then a V-AFC is actually useful. If you would not, it's for the most part useless.

 

useless unless you have major breathing mods (such as cams, headwork, oversized valves, turbo, super etc etc..) and need to modify your fuel curve beyond the parameters the stock ecu can modify them. Changing Vtec engagement will for the most part do nothing unless you have changed cams, headwork, valve size, etc etc.

Also realize you would have to dyno tune it to get it "right". This will cost near the price of the unit to get perfect unless you are good at it. (which I doubt since your asking this question)

Money can be spent in better places at this stage in the game

 

yeppers they only lean out your fuel curve as well. if your seriouse about one heres a link on how to tune. http://macguyver.ath.cx/vafc.pdf

 

great article!