I have the Megasquirt (standalone with idle/fan/EBC mods-no solenoid for EBC yet though-can I just use a manual boost controller for now?) up and running NA on the car with AFM, so it works and runs although a little rough...so next I thought I would add the IAT and get it running on that...then the 550cc hi-z RX7 turbo injectors...once I have it running on all of that I figure I can add the manifold/turbo/AEM Ungo wideband and at this point it might be a good idea to go ahead and use someone's proven .msq to get me close on this setup and then tune from there...am I going about this the best way? Thanks!

 

If your car is running on the pnp map then i would just tune from that. Get your fuel to an acceptable tune and then get on the dyno and finish tuning fuel then do the spark map.

 

Wideband should be in your immediate plans.

 

Install your wideband now.
Install your IAT now.
Use the MSPNP .msq to get you going, then scale it for injector changes (search).

Your plan seems fine otherwise.