GTO_Scott

iTrader: (3)

I have a 2004 LS1 with CAI, catback, and Kooks LT headers with cats. The following A/F ratios were produced from a dynojet wideband at tailpipe while running on the dynojet dyno. Several runs showed the same results.

Please ignore the higher line beyond 4,500 as it was the result of me pushing in the clutch at 6,200rpm while the recording was still taking place.



Should I be running richer at lower rpms while at WOT? If so, at what rpm should I shoot for 13:1?

Zombie

iTrader: (2)

if your tuning it on a non eddy current dyno (ie dynojet) tune about .4-.5 richer than your taget a/f, on the street it will lean out. You should aim for 12.2-3 on the dyno which will get you to 12.7-8 on the street.

tici

iTrader: (1)

He asked about the RPM... I'm also interested!

Tiger2o69

iTrader: (16)

do you have a dyno graph?

GTO_Scott

iTrader: (3)

Yes, here is before and after Kooks LTs and 3inch cats. Also note I have a y pipe to single 3 inch Corsa catback so the A/F is from both banks.

txhorns281

iTrader: (12)

richen up down low for more tq, lean out a tad towards peak hp, richen back up towards redline.

Whatever AFR you motor likes b/w 12.0 and 13.0 is up to it...