Im going to dyno my car pretty soon but i have to tune it myself. What should be the best a/f ration with my setup? mods are on the sig. TIA

 

B-series motors tend to like about 13.5-13.8.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b19coupe &raquo;</TD></TR><TR><TD CLASS="quote">B-series motors tend to like about 13.5-13.8.</TD></TR></TABLE>

ditto to that, sometimes a bit lower, but not much.

 

keep in mind when tuning, tune for power, not for a pretty AFR curve. just stay within a safe range as far as the AFR goes, I usuallly see power in the mid 13s.

but by all means if your making better power say at 12.5:1 AFR, dont bring it to 13.5:1 just to keep the AFR curve nice. Same goes if your making power when leaner at 14:1, keep it there. For an all motor as long as you keep it at 14 or under you will be safe.

 

so people usually get power by richening the fuel out rather than leaning it out? i believe the stock a/f ratio for the gsr is 14.7.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96tegsr &raquo;</TD></TR><TR><TD CLASS="quote">so people usually get power by richening the fuel out rather than leaning it out? i believe the stock a/f ratio for the gsr is 14.7.</TD></TR></TABLE>

lol, no 14.7 is stoich. Thats what you shoot for at light, or party throttle apps (ie cruising) for an N/A car.

Stock ecus tend to run a little rich for reliability concens. (changes in air pressure, elevation, temp, etc can change a:f) Usually if u want to extract a little more power out of a stock setup you can lean it out just a tad. (but u need a dyno to see if u gain or lose power)

While tuning your setup with the ctr intake cam, some of the small gain you will achieve will probably be through cam timing adjustments. Other things to look at will be vtec engagement, and a:f, i guess if the intake cam is doing its job it should need a little more fuel up top than the gsr cam.