Thanks again for the reply.

I had guessed SD might have represented speed density :)
No MAF just an old 7427 PCM.

Okay... so the Integrator tries to hover around Stoich!
That now makes more sense and explains why you said I had it the wrong way around.

If I'm understanding this the BLM at 117 is representing where the INT has already pulled it to, so that's why the INT is now in it's happy 128 place?

If you don't mind I now have another question, if the Integrator can move the BLM to operate the engine's EFI at Stoich what's the big advantage in altering the VE table so the BLM ends up close to 128?
I've altered VE tables many times to get it close to get the BLM to show 128 but never thought about the advantage in having it as close as possible to 128 vs letting the Integrator sort it out?

Cheers,
Andrew