2008 Mustang GT with Kenne Bell Stage 1, Kooks Longtubes, high flow cats.
In Nov 2017, I had it dyno tuned. The tuner set air/fuel at 11.7:1 at WOT. A few months later, I installed an Innovate wideband sensor and ran it to an Aeroforce gauge. It confirmed 11:7:1 at WOT.
So, I set the Aeroforce in scan and didn’t pay much attention to AFR this last year. In the last week, I started paying attention to it again, and it gets down to 11.1:1 at WOT.
The changes in the last year since the dyno:
1. Pulled the Autolite plugs put in by the previous owner and installed Brisk. The old plugs were at .045 gap. At the tuner’s recommendation, I did the Brisk at .035.
2. Installed MSD plug coils.
3. T56 Magnum with RST clutch.
4. Went from 3.55 to 4.10 gears.
5. Upgraded the HE and intercooler pump.
All other changes are either cosmetic or related to the brakes and tires.
What I’ve done to diagnose:
1. I recalibrated the wideband sensor. No change.
2. I put the OEM coils back on. No change.
3. I pulled the Brisk plugs, cleaned, inspected, and reinstalled. No change. They looked great with no evidence of running rich. The tailpipes are not sooty.
The car feels like it always has. I considered the gauge might just have gone faulty, except that it hovers around that magic 14.7:1 ratio when cruising or idling.
I’m starting to wonder if I’m going to have to pay $500 again to put it on the dyno again.
In Nov 2017, I had it dyno tuned. The tuner set air/fuel at 11.7:1 at WOT. A few months later, I installed an Innovate wideband sensor and ran it to an Aeroforce gauge. It confirmed 11:7:1 at WOT.
So, I set the Aeroforce in scan and didn’t pay much attention to AFR this last year. In the last week, I started paying attention to it again, and it gets down to 11.1:1 at WOT.
The changes in the last year since the dyno:
1. Pulled the Autolite plugs put in by the previous owner and installed Brisk. The old plugs were at .045 gap. At the tuner’s recommendation, I did the Brisk at .035.
2. Installed MSD plug coils.
3. T56 Magnum with RST clutch.
4. Went from 3.55 to 4.10 gears.
5. Upgraded the HE and intercooler pump.
All other changes are either cosmetic or related to the brakes and tires.
What I’ve done to diagnose:
1. I recalibrated the wideband sensor. No change.
2. I put the OEM coils back on. No change.
3. I pulled the Brisk plugs, cleaned, inspected, and reinstalled. No change. They looked great with no evidence of running rich. The tailpipes are not sooty.
The car feels like it always has. I considered the gauge might just have gone faulty, except that it hovers around that magic 14.7:1 ratio when cruising or idling.
I’m starting to wonder if I’m going to have to pay $500 again to put it on the dyno again.