Without a log it's just a cool story bro. lol

See. I even downloaded a free app on my phone that can log for me.
But you need to change your plugs

^Monk beat me to it.

Actually, detonation is easier at cooler ambient temperatures because the air is more dense. It generates more cylinder pressure and makes more power, too.

I would highly doubt it's det. He's running an uber conservative map made for 91, on much higher octane fuel, at wg pressure.

Possibly spark plug(s) or the janky NB1 ignition system is finally telling you to go LS coil

Not using LS coils? Start there.

Failed at SD card, but I did discover I was temp range 5 plugs, so I swapped them out for 7s. Of the 2 sessions I've run so far today, I only got the miss at the end of the second session.

According to MT wisom, my car shouldn't even run with the NB1 coil pack, so I'm going to chalk it up to that. I've got pretty much every other ignition option hiding in my garage, so I've got options.

5s wow. Yeah the 7s should help a lot.

It helped some, but I was still getting the miss. The difference is that through judicious application of load (eg: try not to stomp on the loud pedal as much) I could control it and could almost estimate when it was going to happen. The most telling incident was after the 5-6 minute holdup where we had to re-grid in my second to last session. And the incident in question was the lack of incident. That delay let things cool down enough that I was able to go heavy on the throttle through the rest of the session without any sort of misfire.

Coils are the first thing I'm going to throw at it.

The problem, as I see it, is the misfire would only pop up in the last couple laps (4-6min) of the session after things had been run hard for an extended amount of time. Sessions were about 20min (iirc) so there is virtually nowhere I can reproduce this set of conditions in public without getting arrested or dying. I guess I could try to do it on a load holding dyno with the hood down, but that sounds expensive and excessive. I guess I'll just have to run more trackdays :D

Logs are useless at determining misfires. I've tried a bunch.

Your car is fast Gordon. Maybe shoot for 2 track days next year?

Might want to throw a cam sensor in there too, just for good measure.

--ian

How are your coils shielded from the exhaust?

by a non-existent heat shield.

looks so good too

By being NB1 coils behind the head.

look at it, it's right here --> <-- 100% efficient too :D

QFT

So Gordon didn't ride with me in my car, and I didn't ride with Gordon in his car. We did not cross-pollinate each other with our own special brands of epic mediocrity despite this being, correct me if I am wrong, the first time in the history of the Miata universe that two former brotrex Bros turned EFR Bros were physically colocated at the same track event.

Sad!

Or: you both didn't break anything. So there's the glass half full part :)

My car is fuggin fast as frick. No Joke.

The addition of the Recaros, 6pt harness and Xidas have dramatically changed the car. I'll blather about this later in some terrible wall-of-text post, rife with spelling errors and emotional glop, as is my way.

Good call. I believe I have spares.

All of the above. Its an NB1 coil pack, WHAT COULD POSSIBLY GO WRONG?!

I know you all want me to go LSx coils, but I'm not going to do it :loser:

Not right now anyway. I've got a set of Trackspeed Toyota COPs sitting in my garage and while I had origionally built a harness to run them in batch, I'm going to rebuild it and see what I can do about adding a couple more wires so I can run sequential. I suspect I will ruin my car in the process, so stay tuned for updates! :bigtu:

This is QUITE true, though I must say, if any of you dear readers have the chance to meet Mr. Möbius at some point in the future, please do so. He is a gentleman and scholar, and if you have any anti-vaxxer friends, he would love to meet them ;)

No joke. Lots of breaking this time around. Codrus lost a transmission, aidandj may well have lost a motor, turbofan managed to get a leak in an AN fitting that supplied coolant to his turbo, a leak though the internal swivel o-ring seal that grounded his car all weekend, afm lost a coil on his NB2 and cxracer snapped off all the bolts between his downpipe and turbo. Madness!

IN 4 Anti-Vaxxer story