This is where people get paid to tune, this is the challenging part. Spark is going to be different for every engine and configuration, air flow / load is more important than psi. Start with your maf transfer function it is THE most important part of the tune, make your fuel changes here to even out stft in closed loop and to make afr match your base table in open loop. You have a lot of re-scaling to do, you will need a larger maf tube (scale the MTF by the ratio of radius^2) and/or a diablosport mafia (scale injector slope and engine displacement according to instructions), plus you have to re-scale a bunch of tables to read over 1.0 load
