They said the baseline was done on a mustang, they didn't say that the pulls with the supercharger were done on a mustang.
The current numbers are consistent for an a basic FI kit on an FA20 on a dynojet on 6-7psi maybe 8psi. You'd be looking at around 220-230whp if they had done the supercharger pulls on the same mustang they did their baseline on.
If those supercharger numbers were from that same mustang, I would be pretty impressed. 111whp gain?!
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