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Trubokitty Base Ignition Map a Little Aggressive in Boost?
Sup guys. I'll make this one as quick as I can.
Finished installing my turbo setup last week and have been driving it around all weekend. I'm running the Trubokitty base map on my MS3x. Setup is an unopened '95 engine running a top mount Kraken kit w/ a GT2560r and 3" exhaust. 8psi wastegate spring and no boost controller right now. Ambient air temps have been cool this weekend in the 40-60*f range. Thing seems to be running great on 91 octane, haven't noticed any knocking under boost conditions or otherwise. That being said, I've been reviewing some other threads on here and it looks like the Trubokitty ignition map I'm running is more aggressive than what most people are running by 2-3 degrees in boosted areas. I'm planning on getting the car dyno-tuned but I'd like to get an experienced set of eyes on the ignition table I'm running so I can make changes if I'm in dangerous territory.
Trubokitty ignition table for reference. I re-binned it to match my VE and AFR tables but haven't touched anything else. My main concern is the highlighted cells, given I'm running at 8psi right now. Given the fact that I'm not experiencing any knocking, should I pull a couple degrees out of the highlighted area (and maybe a degree out of the rest of the boosted area), or is there no cause for concern?
As always, thanks in advance to anyone with advice.
If you're not experiencing any knock it is probably fine -- if you want peace of mind, pull 2 deg from the whole highlighted area, wouldn't hurt anytthing. You already said it, but real tune is the way to go
Yeah, that's about what I figured I should do just for peace of mind. Probably didn't need to make a thread for this, just wanted some confirmation. I pulled a degree out of everything in boost up to 180kpa from 2900 to redline and half a degree out of everything in the same load range below redline.
I also didn't think about it when posting but the car had half a tank of 87 in it and I topped it off with 91 the day of the turbo install so really I was running 89 all weekend with no problems. Kinda forgot about that during the excitement of installing my kit. Oops.
Getting the car dyno tuned at Advanced Engine Dynamix (local SoCal turbo Miata specialist) sometime in the next few weekends. I'll post up the ignition map we land on once it's tuned!
I was running a trubokitty ms3x 99-00 base timing map on my car (with standard compression bp4w), and both 18PSI and my local tuner told me that timing was too aggressive. I think my tuner pulled out 5-6* of timing without losing any power on the dyno, so he told me the map I came in with was pretty aggressive.
I'm not at all dissing Scott, more iterating that a base map is exactly that, a base map that should be dialed in for your vehicle. That said if I were running his base map again I'd pull 5* out of the boosted areas right away.
That also said, that base map held up for 10+ track days on stock pistons and 91 octane so it obviously wasn't too terribly aggressive.
This is what I came here for. Thanks for the feedback, man. I was curious if the stock map might even be past MBT for my car. I really was hesitant to play with timing at all but your guys' comments kinda reminded me that I can retard it a little and I might not even notice a power drop.
Side note: I wonder if the 99-00 map is even less aggressive than the 94-97 due to the increased compression ratio on the BP4W, or if it was left the same for both models... guess I got a little research project to do tonight.
I'm gonna pull a few more degrees out of it on my lunch break and see if there's even a noticable difference in power, then probably leave it there until I get it tuned. The car already feels twice as fast as I'm used to it being haha. Again, I'd rather not push any limits and I'm not gonna track the car before getting it dyno'd. Having a little peace of mind that I can push it safely on the street will be nice though.
I too have run the trubokitty basemap (1.6 map - 2* above 6psi) way longer than should be allowed with no major issues.
the NB2 map is built different where it brings in a ton of timing towards redline and is a total dog at lower rpm. I blended the 1.6 map into it and my det cans are quiet up to 8psi so far.
Guess I should really look up the different gen basemaps to see where their advance differs at various loads/rpms. I would have guessed all the basemaps to be pretty close to each other.
I ended up taking 2.5 degrees off the boosted areas above 2900rpm and 1.5 degrees off of everything below. No noticeable difference in power via the butt dyno this morning. Think I’ll leave it here for the time being.
Got the car dyno tuned at Advanced Engine Dynamix yesterday and made these numbers at 10.5psi with this timing map. You guys with 300+ whp Miatas are nuts, this thing already feels like a dang rocket ship at ~210 hahaha.
12-11-2022, 10:59 PM
Trubokitty Base Ignition Map a Little Aggressive in Boost?
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