could someone briefly explain what the apexi s-afc does for an NA engine as far as fuel economy and performace, and are there similar products like this out there? anyone tried them? just a brief explanation needed, i know it taps into the mafs and alters the signal attempting to "trick" the ecu thus modifying the fuel maps slightly? problems running lean? thanks for the explanation...

 

http://www.overboost.com/story.asp?id=136..its an install on a civic..ive had 2 of them on my ser's and my integ..its great..u'r fuel consumption will be higher.on hondas the fuel is low until u hit vtec then its greater.On the nissans that ive had(sr20 b13) the afc did improve my times at the track and gas by alot.i had the s.afc 2.i hope ur car is modded up to handle this upgrade..its serious..the afc2 has a little tach thing on it

 

I dont think it does anything for it except for the fact that you can montior your car closely

 

s-afc is for tuning your fuel maps by adjusting your fuel either +/- in rpm increments. It wouldn't have any significant gains NA unless you are a vq35de running headers (some have been known to run rich)

tuning is done on a dyno reading your air/fuel ratios. Mostly used on turbo/SC'ed cars to obtain a safe A/F ratio for boost

gauges are used for monitoring cars, s-afc is for tuning. Don't be like the local civic guy at the track revving his motor and playing with his s-afc like its a gameboy.

 

an afc will show increase hp on n/a cars since they all originally run rich for protection, however i dont think the gains are enough to get it unless u plan to F/I in the future.

 

thanks guys, makes sense now!

 

More Info:

http://forums.maxima.org/showthread....&highlight=AFC
http://forums.maxima.org/showthread....&highlight=AFC
http://forums.maxima.org/showthread....&highlight=AFC