right now i have my safcII setup from 800-2400rpm's it is set to -1 and from 2600 rpms is +1 2800 rpms +3 and so on by the time it gets to 7k it is up +15. very rarley it hit 7k say like im in autox or in some sort of race but usually i run around 2400-3500 rpms and i tried setting it to -5 at 800 rpms and my car died but at the same time i had a bad acv blockoff plate but after i run hard and it goes down to -1 at 800 rpm's it sputters and the idoit lights come on. so what would be a good setting for between 2400-3500 rpms but yet what would be a good hi end setting for 5k-7k

 

Why are you adding fuel at high RPM? If anything, you need to subtract fuel at high RPM. And you really should be tuning with either a wideband, or at the very least a voltmeter on the stock narrowband sensor.

-=Russ=-

 

If you're using the stock fuel system and engine management, you should be able to afford minus 1-2 points all the way across the board (assuming you're N/A)... There's absolutely no reason for you to be adding fuel anywhere... The stock fuel map (zeroed out) is already overly rich, so you should be removing fuel, not adding it...

Are you N/A or turbo?

Tap your midpipe for a wideband bung just after the header/downpipe... Most dyno facilities offer wideband tuning, and some offer loaner units... You can plug the bung with an oil drain plug when it's not in use...

 

thanks for the help

 

in my n/a i had to take fuel on top end away using a wideband with a 3 inch exhaust and cone filter intake....but every car is different..