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12p on an 808 with a 2bar map and yeah valve springs would be helpful i have just been too busy to get to them in mine something to do with buying a house that needs more of my time at present.

Ohhhh
Any chance of gettin a hold of the tune? Would give me a good baseline to start tuning from since I have no idea what I'm doing lol
But how do you guys tune for boost anyway? Do you start with tuning N/A and get the base table in the ball park then tune boost later or just do it all at once?
Am I better off leaving the old motor in and getting the turbo setup and tune close then putting in the fresh donk?

Id learn on the old one if you have not had much experience. A GT3576R will be spinning pretty early on a 5L even with the stock 1.06 rear housing, gotta take it easy with advance in the low RPM high load areas.

But pretty much yes, off boost areas first - stock timing is normally safe enough. Then in the boost areas rough rule of thumb as starting point remove around 1 degree per PSI. Then tune from that starting at gate pressure or if you have gate springs as light as possible and work your way up.

yeah if you get it happy in off boost arias just fill the 100-200kpa ve table with the 100kpa rows numbers and tune from there i had to take a lot of timing out to start with then fed it back in on the dyno. copy the 100kpa numbers into the 100-200kpa spark table i think i dropped 3deg per row in the table as a starting point.