Thanks for the reply.
I'm struggling to see how the 5th (and 6th) injector(s) would work as sub
-injectors in that scenario, wouldn't they effectively be on the same map as the main injectors, so would be operating under the same conditions?
What I'd ideally like would be for them to come on under set conditions regardless of what the main injectors are dong, say for them to start injecting at above 3,000 rpm when there is positive manifold pressure, increasing gradually as the rpm and pressure rise. This is because I would want the nominal cooling properties of injecting fuel directly into the manifold under boost. If they then bring the AFR down enough for the main injectors to reduce their flow via autotune then all well and good, but that isn't their primary purpose.
Would it be possible to use auto-tune for the main injector map, but use a greddy pressure sensor in the boost port of the EMB and use this as the reference for the sub-injector map?
I think the above should work, as the autotune signal feed is plugged into the main harness and doesn't use the boost harness (where does the autotune pressure feed go - directly into the autotune box of tricks?), but it would be great if you could confirm?