I did some reading and video watching last night on tuning and maps and such.
First off, at the very beginning when you punch in the engine constants, you need to get that right. After you type them in, THEN you do a fuel calculation to get a basic VE table(volumetric efficiency or required fuel).
With ITBs(individual throttle bodies) the setup is different from most cars. Port injection sprays the fuel into the intake port on the back side of the valve, and is pretty efficient(but not quite as good as direct injection). If you check the box for throttle body, the program assumes it is a SINGLE throttle body, just like the original GM throttle body injection. Simply replace the carb with one throttle body.
https://help.summitracing.com/...ection-style-mean%3F
We don't have the injectors firing on the backside of the valve and we don't have one big spray for a V8. We have individual throttle bodies and injectors and individual intake tracts, somewhere in between the two choices in Speeduino. The difference in the fueling is almost 10% more for throttle bodies, and is about what I added to my original map to make it idle smoothly.
I've started back from scratch with this revelation.
Critical things: Crank trigger angle, falling edge/rising edge trigger, going high or going low to fire coil(and not release smoke!), fuel table.
Another biggie: TURN THE AFR compensation OFF! You need to know what the AFR is, but you want to manually control it. This is super important, you don't need the ECU trying to undo or modify the change you are trying to implement, you'll end up chasing your tail.
The other thing I noticed was how fast the head temp increases when the mixture is too lean. I richened it up and the temp came down IMMEDIATELY. I think our engines are fuel-cooled as much as air-cooled LOL!
There is a youtube guy who makes videos. All his car builds are Speeduino-based(and left hand drive). I think he lives in a British Empire island nation somewhere but haven't looked it up yet. His name is Dwayne and his channel is DC Werks. Very knowledgeable and down to earth, only a touch difficult to understand with his slight islander accent. I'm really learning a bunch from him, he has great tutorials.
https://www.youtube.com/watch?v=pwCq9t_DLr0
More to come later.