Mix of throttle position and manifold pressure

On an engine like the VG30DETT which uses multiple throttle bodies and forced induction, will this more difficult tuning style of using both parameters (MAP and TP) be required? Or are you more referring to ITB vehicles with collectors/manifolds?

Thanks

What ECU are you running?

In theory not more complicated as the MAP tune is based on in intake pressure and temp, which it then uses to calculate the amount of fuel required.

In some cases you can have adjustments per bank to handle any variation in each banks airflow, temp and other factors, especially in twin turbo applications where each turbo may slightly be different in its output. Of coarse thats not to say there aren't situations and use cases where you need to be more picky about tuning per bank, especially when running more extreme power

So while its the same process, you may find yourself have to make some tweaks to correct for these subtle difference between banks. However some ECU's like Haltech most of this is done for you as part of wideband closed loop control. You just tell it you have banked wideband (2 sensors, one per bank) and two throttle bodies. Then let its magic do its thing.

The VG30DETT has a link pipe to balance out the MAP signal, so it usually only needs 1 map sensor. You can use two lambda sensors and do bank-to-bank balancing of the AFRS.

The method of tuning Alpha-N with MAP as a 4D compensation is usually for a stock-style RB26DETT in a GTR or SR20DET in a GTi-R. You can still tune engines this way with single-throttle bodies or twin as in your case and bank-to-bank compensations, usually done with twin lambda kits.