MS3...I have some tuning questions...
 

Does MS3 allow on the fly boost or map switching should it be hooked up to a momentary switch that could be pressed when the ECU is already running?


Thought: push to pass button on my race build so i dont have to have the engine running 10/10ths all of the time but I can bring it up to that if there is someone being a dick infront of me.

yes

Thanks, i knew it could switch... but was unaware of if it was on the fly capable.

i dont have the screen in front of me, but you have a bunch on parameters you can switch different things from with a simple switch to ground.

I did boost switching outside the MS, just put a toggle switch on the EBC ground. I could switch between wastegate (10psi) to 15psi using the MS to control the solenoid.

Check out the table switching and blending notes in the manual:

Megasquirt-3 MS3 Table switching, blending and dual table