Street tuning is not really guessing like everyone thinks, your using a wideband therefore your doing basically what you would do ona dyno u just dont know if your making any really power changes, it might feel better but who is to say that it is better.. Thats really the only difference, and as far as general procedures go its basically understood that any N/A APP whether you have major bolt ons(cams,Cam gears, new injectors, Springs/retainers) or just your basic bolt ons(I/H/E) the commonly used AFR is 12.9 -13.0 or .1..any lower or higher you usually dont make power or you lean it out too much.. Forced induction APPS usually start around 11.8 AFR-12.1 depending on the turbo or supercharger..
As i've tuned more and more Car's i do realize and have known this already but most cars make their best power between 2000-7500 In any case i never tune 1k-2k any way, at WOT.. And the pulls on the street are usually done in 2nd gear at WOT you never tune any other map otherwise, you start to mess with your gas mileage and what not. Tuning basically for WOT is what you should be doing... As in disable vtec or set it really high and start in 2nd gear, and do you some pulls to see where your AFR is.. and start from say 2-4k and go from there
all the way to redline, as you move your fuel up and down your AFR will stay steady or go lean or rich.. you can figure out the rest from there.. As far as setting vtec on street tuning, it really isn't that hard, as you tend to reach the ending point of the low cam power it will start to drop it off, on the map your tuning, you'll see that if you keep goin up in fuel it'll just richen and if u keep bring it down too much it'll lean out.. low cams usually stop around 4800-5400k so watch between that main area, yes its a broad spectum but guys i've done this for 100+ times i know what i'm talking about.. Thats Where vtec should engage of course after you've tuned the vtec stage..
Tuning vtec really isn't harder then low cam, engage your vtec say about 3000k and tune the whole band.. all the way to redline..make your pulls, find your AFR and start tuning from there doing 2 or 4 grand pulls between each tune, dont jump around cause you map will be sloppy and not good..
when once you've done a rough tune on it, make a few 1st,2nd and 3rd gear runs watching your AFR , good to have a friend cause around 80 its not good to take your eye's off the road.. i'd suggest making the full run so you can see if you have any dips leaning out or riching ..and just see overall how the car feels.. it'll be smoother and alot faster that i know.. any questions feel free to call me at 225-610-2241 or Aim me on dunndeal69