Hurricane 270 tune difference compared to 300 header tune?

[hpmaniac]

Side note, i was running the Header tune this year and it would still be correcting fuel up to 110% @ 53 lbs key on with the bigger pump.

This just tells me the base tune is off a mile, In the automotive world and cars i tune we like less than 10% correction. Not sure how this system works though but That is a BUNCH of correction. what are you for actual afr on a pull at say 8800-9200 rpm? Nm i see 11.8