Yeah, this has been pretty much my experience exactly, and I have tried to use the MAP readings to get it dialed in, and I think without a steady state dyno we're probably just going to have to...

Yep, I agree the goal is to get to MBT, and I do have concerns about too much advance, or at least more advance than what's really necessary...without a dyno it's really tough to tell what's perfect,...

Did some additional testing thanks to the benefit of the EGR override and I can now see that the factory EGR tuning does tack on an additional measure of timing advance when the EGR is active. Let's...

Yep, as SteveO pointed out, we've got the switch voltage adjustment as well, but IDK about the dwell time. I don't think there's a table for that in the PCM natively, but he may be effectively...

I'm out there man, thanks to $EEx I'm in OLSD 95% of the time, usually just use CLMAF for startup/warmup and when the motor gets heat soaked and my IAT's skyrocket due to my warm-air induction setup,...

Also, this talk on economy reminds me of another idea I've had lately.

One tactic that can be employed to decrease fuel consumption is to lower the swing voltage of the O2's from ~450mV (14.7) to...

Interesting, I like that we're getting some good discussion going about economy. I think I understand the basic premise of what you're saying, in that, if the PCM, in closed loop, is always trying to...

I'm excited!

Yeah, absolutely. Testing software is actually part of my job, and I use EEx for approx. 5 hours per day, lol, so it would be a natural fit. I've been testing the manual EGR override and it seems...

I for one am super excited about any economy parameters you can come up with to display in real time. I've done the formulas and created a mpg gauge in TunerPro RT, but I have 2 issues A) it needs to...

OK, so I got my trans swap done, and had been cruising the last week or so on my automatic tune, with no changes. Only issue I had was the speedo, no matter what I did, I couldn't get it to read...

Also, I'm about to go live with my 4L60e to T56 swap. Since I've made various tweaks to the tune that's currently on the PCM, I'd rather not start over with a factory fresh manual tune if at all...

As a corollary, I think lots of guys with LT1's would be really interested in a way to economically drop the optispark in favor of a traditional distributor. There's a few options out there now with...

Are you talking about being able to control the EGR solenoid manually??? If so, I would be super excited about that. I've been doing my research and I think there is more MPG to be gained from the...

Same here.

I'm back again, continuing my quest for MPGs...
One topic I had seen on the web was to lower the O2 switching voltage from 450mV to trick the ecu into thinking stoich is actually leaner than...

Unqualified answer: yes I completely agree with you, I'm running too low of octane fuel.

Answer with qualifiers: Right now, my #1 goal is reduction in cents per mile, so I did some back to back...

So I'm really glad that you mentioned your thoughts on EGR. I spent a while with it tuned to open the EGR valve as much as possible, and yesterday I disabled it altogether, and wouldn't you know it,...

While I appreciate the info, I have no idea how to do what you've written, LOL. We just went from 'advanced user' to 'super user'

I think you're thinking of table 'DFCO spark blending' which does the transition smoothing. There's another table 'DFCO Spark Retard' that retards timing while in DFCO and the more you retard it, the...

That's quite interesting. I was operating under the assumption that the inert gas in the chamber would indeed reduce fuel consumption, but I definitely now feel compelled to disable it altogether and...

In my ongoing quest for more MPG's from my LT1, I'm trying to get the EGR to come on more and run at higher duty cycle. Any ideas on how to set the various parameters to maximize EGR on time and duty...

Well, whatever you decide to do, your tool has been a huge help to me in keeping my car on the road and saving me gas money and I really appreciate all the work you've put into it. And even if you...

Yeah, I'm starting to see what you mean, by feel. With it set to 16.2:1 steady state cruising is good, moderate elevation changes are ok, but power starts dropping off, relative to richer/stoich...

Awesome! I used that to set up some charts comparing injector PW and MAP changes between 14.7 AFR target in CL and 15.2 using your override AFR feature. Afraid to get any crazier than that until my...