Car has VE only, no MAF, 2 bar.

It?s a 9.5:1 6.0L forged rods and pistons, LS9 cam.

The gauge on the AEM 30-4110 looks pretty accurate based on the smell of the exhaust and how it drives - rich. It?s a dedicated wide band on the red wire and I get data.

But when logging at idle and just off, the error table says she?s out 18-19%

It has to be a math issue but I can?t find it. If I copy and x - half it, it ends up being lean.