[JLMounce]

lfdsteve. We get it, you got screwed on your Powerjection and you're holding a grudge. That's your choice, but you're not helping in this thread at all. If you take a look at the Holley Sniper forums, you'll find the exact same issues, as you will with the Edelbrock offerings. Kindly contribute meaningfully, or butt-out.

Squid, if you're trying to optimize, you do need to hit the dyno. Every car is different, so what your particular combination needs will be slightly different.

For idle tuning, you do exactly as you stated, set your afr/spark targets to achieve maximum vacuum. That's still going to be your engine's happy spot off load. Don't forget to listen to your nose as well. Stinky tail pipes will tell you a lot.

I've mentioned this before, but I don't like the "self learning" nomenclature that these companies are using. The system doesn't learn what your engine needs, it just learns how to produce the results that you command from it. If what you're commanding from it isn't optimal for your combination, it won't run optimally.

You've had your FiTech's running on your cars for a while now so any kinks in setup etc. should be sorted. Now is a good time to get it on a dyno for a couple hours which can help you tune your WOT operation. This is how I'd go about that.

Make three pulls based on where the car sits right now and average the power and torque

Then, just like you would when setting up a distributor manually, start adding or subtracting timing in 2* increments. Watch for power increases or decreases as well as detonation. Chase the increasing power with spark until you start going the wrong way, then back up to the previous advance settings.

From there, do the same thing with your fueling. Does it pick up power going fat or lean? Move in that direction until power starts to drop off, then move back to the previous setting. This will produce the happy spot for your engine in WOT operation.

From there, you can road tune your cruise operation over time by seat of the pants feel as well as what the car is getting for mileage. Work on one aspect at a time, either timing changes or fuel changes and chase max efficiency. The best way to do this the quickest, is to pick a route that you can duplicate that's maybe 50 or so miles and starts/stops at a fuel station. Include some city and highway driving in that. Make a change, fill your tank and start your journey, then fill up at the end and measure fuel consumption. Repeat this process with each change you make, noting if consumption increases or decreases.

Make some mental notes about how the car is driving. Minor amounts of fuel consumption increase may not be worth dealing with things like bucking, or increasing coolant temp etc.