I know that in boost, a/f should be around 12:1, but how about when not in boost? I know, at steady vacuum (crusing) we would want 14.7:1, but how about when you're accelerating lightly what should the a/f be at? Someone told be just to tune everything that's in vacuum to 14.7:1 and 12:1 in boost. True?

 

depends on the load on the motor. Say 100% load (WOT) you would want 12:1 and 10% load (crusing) is 14.7-15.1, then if your accelerating half throttle with moderate load you might want it around 13.5. Depends mostly on the load and if your in boost. Hope this helps.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nevin &raquo;</TD></TR><TR><TD CLASS="quote">depends on the load on the motor. Say 100% load (WOT) you would want 12:1 and 10% load (crusing) is 14.7-15.1, then if your accelerating half throttle with moderate load you might want it around 13.5. Depends mostly on the load and if your in boost. Hope this helps.</TD></TR></TABLE>

How would you determine load? With the map sensor values?

 

this has been covered in quite some detail numerous times....i think if you searched a little, you'll find a lot of useful info. and if you come up empty handed still, ill release some more info to your liking