60' is great and then starts to peter out from there on.
Is the converter staying locked after the 1-2? Can you post some logs?
On the Coyote side if we lose an upstream o2 it absolutely impacts performance. I have seen a couple of MPH and .2 down. (this is common with e85 and LT's due to the additional moisture generated)
There are a couple of solutions:
1. Dumped exhaust so that moisture doesn't pool in the collector.
2. Wrap the headers to keep temps up inside the tubes to reduce moisture.
Don't give up on this....
Incrementals for comparison:
