with full boost not hitting til 4300 rpm are you sure its a 0.48 housing ?

also the amb temp sensor location will have a massive effect on corrected power outputs.
I have had a car run on a dynapack with a din correction factor and with the amb temp sensor seeing 60d with it hung under the bonnet it added 60 whp in corrections !

we really need all the data from the dyno run to get a better picture of a true hp figure.