Mine consistently shows a 0.2 AFR difference between actual AFR (displayed on LC1 gauge) and Tunerstudio. This is a known fault, and provided you allow for it by setting your target AFRs 0.2 low across the board) you should be apples.
More variance than that and I would suggest you either have the wrong wideband settings in Tunerstudio, or your WB requires a recalibration.
Dweezle - How do you have the earths for your LC1 and Megasquirt wired? It sounds to me like you might have a ground offset problem.
The LC1 manual has a useful section on wiring, and the importance of proper grounding in particular.
Ultimately you should have both the LC1 and Megasquirt earths attached to exactly the same point, with the same length wire. This goes for your analogue gauge too. In practise, you should be able to get away with the LC1 / Megasquirt / Gauge earths just connected together at some point somewhere close to the Megasquirt.
With your setup currently, the only number I'd trust (after a free air calibration) is the value being displayed in Logworks via the LC1 serial connection.
Thanks for the reply. Not using it anymore. But in case this helps someone out down the track. I was using the grounds and power for The lc1 from the megasquirts Db15 connector. Braineack built it that way so i assumed that was fine. I seemed to have almost an exact whole point richer than what was being displayed on a gauge. So i just tuned from logworks and used the gauge as a guide during driving.
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