GEN 3 6.2 HOLDEN PE troubles

Recently i was playing around with the power enrichment table on our Gen 3 6.2L v8 with hp tuners. Is it normal to have to command a way richer EQ ratio than you originally thought? Originally i had the higher end of the enrichment table commanding an EQ of 1.150/0.86 Lambda and watching AFR readout on the dyno during the pull it was nowhere near the target and was showing a leaner result close to 13.8 ish. I ended up having to command much much richer in the PE to achieve the desired afr on the dyno after a WOT pull.

I first thought the wideband on the dyno must be out however I'm very positive it isn't because it has matched the commanded AFR of other vehicles nearly perfectly. I tried looking for a modifier that might have been messing with the final commanded AFR but have not found one. LTFT is disabled and confirmed to be disabled.

Might be that your MAF needs scaling at that flow rate, so that commanded = measured.

The error either comes from the fuel side or the air side.

If your injectors are stock, they should be well characterized.

If aftermarket, perhaps the injector data is a bit off.

If fuel pressure is on target, it's not that so you move onto the air mass calculation side.

In terms of air mass, adjusting MAF scaling David mentioned, and/or SD tuning if present.

Any time there's an opportunity to tune on known good injectors with known good data first, it allows you to remove that from the list of variables and focus on tuning for accurate air mass calculation. Then if you swap only the injectors with no other changes, you get to adjust only injector characterization data until you get things back on target.