Peak MAF

[tartan_rob]

I get around 150G/s on mine but I think thats cause its RS4 MAF and g/s is scaled figure to work with the S4 ECU.

I'd be concerned about this....150G/s is 150G/s irrespective what car or device it is measured in. I would think that any scaling (if at all) would be done by the ECU prior to calculation. This figure should give the correct figure and throughput - untampered. IMHO.