I have a sfc vtec controller, but i dont know whats the good settings on the air fuel ratio. like for ex. 0 (air fuel)- 1 (rpm) 0-1. i had no clue. The car has a h22a1 motor with intake,headers,catback,msd ignition,groundkit, and the sfc. any suggestions would appreciated. thnx.

 

You have to go to a real dyno to really tune it effectively. Every car respond differently to mods, and butt dyno tuning just doesn't work .

 

f(x) = sine(pi/4) / cosine (9pi/6)

thats the formula to determine the numbers you need.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98vtec &raquo;</TD></TR><TR><TD CLASS="quote">f(x) = sine(pi/4) / cosine (9pi/6)

thats the formula to determine the numbers you need.</TD></TR></TABLE>

huh that confused me for a little, maybe cuz i just woked up

 

until you find out the meaning of that formula to fuel, dont mess with it

 

question, do u guys have any exploded view of the whole engine for h22?thnx

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98vtec &raquo;</TD></TR><TR><TD CLASS="quote">until you find out the meaning of that formula to fuel, dont mess with it </TD></TR></TABLE>

+1

you can lean out your motor and do damage if you ***** it up.

 

you really shoud have a good wideband in front of you while tunning a/f.

that being said, i do have ALOT of experience tunning vafcs. i dont know about usdm, but stock jdm h22s run pretty rich up top. you can also gain more top end by raising the crossover point up, make sure to add some fuel when if do that. as far as low end/midrange the factory ecu is pretty good by itself. not a whole lot needs to be corrected. its also gonna depend on what fuel you are running as well. this is why its important to have a good wideband.

you really dont need the dyno if you are consistant at the track.