Well I know I wanted to get some video, but mother nature had other plans. Too busy not getting blown away to Oz. This motivational poster seems all too fitting with the weather and this project.
The current tune is pretty awesome under power, or anything above 45mph. But puttering around town at 30mph? Still bugging me. I'm attributing it largely to the non-linear part of the MAF function. Hot idle is waaaaay low. Higher load does ok, and is a lot more air. At very light load, with all the variation, it can cross over between the two regions. I'm thinking that is part of the issue.
So me being me, I have to fix things until they're broken. I took it out in the one hour of rain free time, took the car out, got a log, and warmed it up some. Then ripped apart the intake and put the MAF screen in again.
Everyone right now, reading this (ok, maybe the two people that have followed this thread and are still reading it):
But hear my dumb ass out now. My issue is largely the signal variation. I'm seeing the MAF signal fluctuate by 60+ counts at a pretty high frequency. That coupled with the non linear step area of the MAF curve is making things really difficult. I need a way to even things out.
"But you already tried the screen, you fucking moron!"
Yes, yes I did. And it ran rich and surged like a motherfucker. But I only tried it once, and that was back when I was using SCT, where revisions took 30 minutes. Now that I can change on the fly with TunerPro, it's another matter.
I threw it in and fired the car up. Pig rich again, a faint surge. But with the ability to change on the fly, I took some rough chops at the airflow. And I had to make some big adjustments. I'm talking reducing airflow by over 50% in the transfer function. And then I'm in the ballpark! It can even smoothly rev with no load without breaking up which it couldn't before. MAF count variation is down to 6. That's a 90% reduction. The whole transfer function needs to be rescaled, but I've got a good feeling this shitbox might get some much, much better street manners.
Now we just need the weather to cooperate.