A big test for my Megasquirt
 

I autocross and track my car extensively. I finally got everything running where I felt comfortable running it hard. I took my 91 Miata to North Carolina Motor Speedway (The Rock) for a HPDE this past weekend. You run about 3/4 of the oval and an infield section for a total of 1.4 miles. Its pretty intimidating to run into the 27° banking at 95 mph and hold it at the bottom but it sure is fun!!

The Megasquirt performed pretty damn flawlessly. It pulls MUCH MUCH harder than the last time I was there with the RX7 AFM. I usually have hard time pulling out and passing cars but not so much this time.

I have a random hiccup where the car slightly jumps under throttle but its VERY minor. I think its a grounding issue. All in all it worked like a champ. I logged 1 25 min. session on Sunday and Im gonna see what kind of map I can generate from that.

I even did well enough to win the CSP Time Trial on Saturday but got edged out on Sunday by another Miata.

I also averaged 25mpg towing my tire trailer to and fro the track, even with the Wideband showing 9.75:1 while cruising.

Sounds great! Give me great faith in MSing our 96 for next HPDE season.

Umm... 9.75:1? You're close to washing down your cylinder walls, pardner: Washing away the oil ring, increasing cylinder wear, and thinning the oil, increasing bearing wear.

However, Holey Moley, 25mpg at 9.75:1. That's pretty impressive.

Are you doing MSnS, or just fuel?

Check for spikes in your TPS and spark advance datalogs, noise can cause all kinds of freaky running.

Im running Squirt and Spark.

Its well worth it on track. It pulls soooooo much more from 2k all the way to redline

I had a similar problem with my car which I solved by changing one setting in Accel/Decel. I did have "Decay Accel Enrichment" set to "None", which I changed to "Decay". Since then that hiccup has gone.

Did you put anything in "Accel value at end of Accel Time (ms)" ?

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