Quote Originally Posted by Bio248 View Post
m knocking a good 5* on the top of second, im tuning with an afc and scanning with an ls1m. cant get the scans to load on my laptop for some reason either so no scan data. ive been taking a few and im only really knocking in the 9k-10k maf frequencies, so only WOT.

i have:

1.9 modded rockers
S&S headers
ported blower outlet, wall knocked out, lim matched
3.4 pulley
1.5 dhp file, few codes deleted, ~13* timing WOT


my upper o2s start around 970, and im getting no knock there. when it falls off on the top end im around 940s and then i knock about 5*. i thought lean on these cars was approaching the 920 mark? is this solved with more fuel or more mods? just because its cold outside?

kind of want to get it tuned enough so i can run a 3.2.
Since the narrrowband is unreliable, it's kind of hard to say what kind of AFR you are running compared to your O2's. When I had the same mods as you I had to run a 3.5 pulley and my O2's were around 955 to 960. Last time the comparision was made on my car that was an AFR of 10.6 (pig rich).

With my XP, headers and a lot of other things, I can only run a 3.25 pulley KR free with an AFR of 11.6 which is ~910 iirc.