My left v-band at the turbo has a slight leak and throws the reading off at idle. Through 1st and 2nd gear I'm getting wheel spin and tracrion contol is pulling timing. That throws the a/f off side to side. Through 3rd gear the a/f is very close to the same. That is what my data log shows. Here...
I removed the MS 10-point and had a 25.5 in Docol R8 installed. It got all new brake lines, new aluminum downpipes, new aluminum charge pipe and swapped from 3.27 gears to 3.55's.