I am running the latest 2JZ Supra SC300 9298 MS3Pro PnP Plug and Play from Megasquirt. I have installed it in a 92 manual SC300 that I use for endurance racing. The engine is stock, but is a fresh JDM engine with good compression. I installed the MS and had trouble getting the settings right to get it to run, but finally figured out a few issues. It is supposed to come with a tune that will start the car, but most of the settings were for a turbo 2j so I was able to learn some basics of the ecu software by getting those corrected. When I got the car running, I took to a tuner that hasn't had a lot of experience with the MS Tuner software (friend of a friend, no cost), but he was able to get a timing triggering issue resolved and got the acis to trigger properly. Afterward on subsequent pulls, the best timing and fuel maps he could dial in are in the latest tune, but there is something just not right. The top end power is below what it should be, at least 15 hp maybe as much as 25 missing. I can post the latest tune, log file, and even the dyno pull if someone would be willing to take a look at it. I did not get a baseline with the Toyota ecu, wish I would have, but I took the car to the track and ran it on the MS, came in, installed the Toyota ecu, and ran it again and it is what you would expect from a power standpoint on the Toyota, lacking on the MS. It has a feel like a slight hesitation, but not a dead miss, especially at the upper end but at the extreme upper end it's like you can feel it come in. I realize the butt dyno is subjective, but it's noticeable enough that it is real so no doubt the power is down on the MS. There doesn't seem to be a sync loss in the log file, but we did see some sync loss at idle but nothing in the pulls. I keep thinking it has something to do with that, especially given that is a known issue on earlier MS when using the distributor for timing sensing. One oddity when comparing the two ecu's, the Toyota seems to be dumping fuel, afr's in the low 10's and even 10 flat at wot but on the MS we see more reasonable high 11's low 12's. I am aware we can optimize that, just trying to start somewhere safe. This is a "new" engine but the previous engine did the same thing from an afr standpoint on the Toyota, so it's not a specific injector issue, etc. The engine is strong on the Toyota ecu.
I hope someone will be willing to either share a similar tune I can dig through and maybe figure out something that is missing or wrong in settings, timing, fuel, etc. Or be willing to look through mine and see if they see anything obvious. Any help provided would be much appreciated. Right now I am leaving the Toyota ecu in for the next race (weekend after next) unless I can figure something out. I am admittedly a noob on this stuff, but I have had fun learning and look forward to learning more.
Track Tune Starting MAP.msq
Track Session Data Log 1.msl