air/fuel ration
04-20-2009, 04:18 PM
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air/fuel ration I have been trying to figure out a safe air/fuel for my setup. I have hp tuners. I have not bought a wideband yet. I won't have the money for a few months. I know there is not an accurate way to set the air/fuel without one. I just don't want to lean out and damage something. I was looking at some tunes in the respritory and the numbers were crazy looking. Some for a 383 were less fuel then on my stock tune and a 408 was more, which is what I exspected. Any input will help thanks, my setup is stock bottom end dart 225s and 248/254 .615/.622 110lsa, wiend intake, 1 3/4-1 7/8 stepped edelbrock headers.
04-20-2009, 05:16 PM
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Not an easy way without a wideband. Even if you trust your narrowband O2's voltage, that will not really help.
I guess you could log your Trims..positive would mean your PCM 'senses' lean (>~14.63), but that is really not good enough.
You could at least log for knock, but trusting your narrowbands for anything other than 14.63 is not advised.
Good luck.
..WeathermanShawn..
I guess you could log your Trims..positive would mean your PCM 'senses' lean (>~14.63), but that is really not good enough.
You could at least log for knock, but trusting your narrowbands for anything other than 14.63 is not advised.
Good luck.
..WeathermanShawn..
