im tuning using zdyne. motor is sohc stock block, ported head and mani etc... 57 trim t3t4 turbo, im currently running the stock map sensor. it did my own tune and have boost at 10 psi . its fast but i want more. like 12-14 psi total. but i have to use a 3 bar. so im gettin a 3 bar tommoro . but my question is. when i take my exact same tune im running now and change only the map sensor calabaration from a stock one to a 3 bar it changes the fuel tables alot. i assume this is normal and will still be ok but i was wondering why this is? my current tune at 10 psi has 11MS of fuel , when i change it to a 3 bar at 10 psi its only 7MS of fuel. is this normal? will it run lean now because of this or is it normal to spread the fuel out more since the graph now goes up to 27psi of boost?

 

Generally when you change map sensors, you will need to check and retune almost everything. Columns will shift...interpolations will change.