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Author Topic: The Celica-gts.com Megasquirt Bible  (Read 21083 times)

Offline TerrenceLP

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Re: The Celica-gts.com Megasquirt Bible
« Reply #15 on: Jun 02, 2017, 02:27:17 pm »
Sounds good, I'm familiar with tunerstudio and their engine setup wizard get you started. But I was asking for a ready tuned file to be even closer. My 87 Supra 7M is running MS3 and my base file came from a guy in Canada, http://perfecttuning.net, we had similar mods and set up so  I started with his base file and via Remote Desktop he tuned a little more. Final tune was on Dyno at the EFI Analytics.

I'm mainly looking to play with the 22re and run e-85 and just get it running better than ever - then swap in a 1UZ! What the megasquirt is really for! FYI I have 7m-GTE map files for MS3.

Offline Teranfirbt

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Re: The Celica-gts.com Megasquirt Bible
« Reply #16 on: Feb 28, 2018, 02:34:40 am »
You'd be surprised at how little maps change overall between engines. I started my 2RZ swap on my 22RE maps and it started, idled, and ran well enough to drive it almost immediately. When I put CBR600 throttles on the 3AC in my Tercel I started with my 2RZ maps and it started on the first crank. Similar for the 4AFE in the Tercel, started with the 3AC maps. The 4AGE in my MR2 started with the 4AFE Tercel map 100% great.
The key is to get the req fuel parameter correct based on injector and engine sizes.
Timing is the hard one. You can get add on knock modules, and I think there's a plug in version for MSIII. You can also hook a knock sensor up to a headphone amp and listen to it to get knock.
1983 Celica GT-S 2RZ swap: Deered 2014 :(
1986 Tercel 4WD 4AFE Swap: Going strong
1986 MR2: What a beast!
2014 Elantra GT: The reliable one

"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." ~ Albert Einstein

Offline Grimbrand

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Re: The Celica-gts.com Megasquirt Bible
« Reply #17 on: Feb 06, 2020, 09:04:44 pm »
For those of you running it, have you noticed much of a difference for the 22R/-E engines?  I don't really intend to get too radical with my '85 for now, but if it's a significant improvement, I might have to get more serious about my soldering skills!
If you can't be a good example, you can still be a horrible lesson.

Offline TerrenceLP

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Re: The Celica-gts.com Megasquirt Bible
« Reply #18 on: May 23, 2020, 12:26:59 pm »
My Tune file - https://drive.google.com/file/d/1cYQqbGSii3Mp4Bn78OUPQnb0PScxOLFj/view?usp=sharing

This is the car - https://goo.gl/photos/VcsTz6FpShFktMq69

It's a MAP Sensor Set up with a GM 4 pin IACV for idle control and MSD Blaster Coil, Stock Igniter and mass air flow sensor removed.

Looking for some feed back on AFR table, Ignition table was generated and not adjusted.

ALWAYS CHECK FIXED TIMING FIRST AT OPERATING TEMPS

Is it me or are these engines pigs for fuel?
« Last Edit: May 23, 2020, 12:40:44 pm by TerrenceLP »

Offline Teranfirbt

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Re: The Celica-gts.com Megasquirt Bible
« Reply #19 on: May 23, 2020, 10:14:47 pm »
First question, I'm assuming you're running NA? Take some time and rework your ignition map to have as much resolution as possible. Ramp KPa steps starting around 10 and go to 105 for your top row, that way you can control the map better. The columns and rows from your fuel map are a good starting point.

AFR maps looks pretty decent. I'm pretty coarse when I make mine. Cruise are is 15.5:1, idle is 14.5:1, and WOT is 13:1. Do some smoothing and call it good.

You'll probably find that adding more cranking and after start enrichment will improve starting.

For ignition, I would set the cranking area (<500RPM, ~100KPa) to 5 degrees advance to avoid firing the engine backward, and the idle area at 8 degrees. Change your RPM columns to have more resolution in the lower RPM range where knock is more like to happen. Above 3500 you can pretty much run the same advance through the RPM range. To set up the cruise region, find the timing that just starts knocking at full throttle, set the bottom row 10 degree more than that, and then linear interpolate each RPM column. This will get you in the right ballpark for reasonable mileage at cruise.

Your 2240 RPM column is probably fine, but the 1573 RPM column is going to ping if you really open the throttle.

Really, the best thing you can do for yourself is to get more RPM resolution below 3500 in the ignition map.
1983 Celica GT-S 2RZ swap: Deered 2014 :(
1986 Tercel 4WD 4AFE Swap: Going strong
1986 MR2: What a beast!
2014 Elantra GT: The reliable one

"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." ~ Albert Einstein

Offline TerrenceLP

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Re: The Celica-gts.com Megasquirt Bible
« Reply #20 on: May 24, 2020, 03:34:38 pm »
https://drive.google.com/file/d/1FcEsZBNkhhwxIDUlo4iKL2tVyeZtAQMQ/view?usp=sharing - UPDATED 5-24-2020 New Ignition Table

THank for the heads up and yes It has puffed smoke from the intake! But just took her for a drive with the updated timing table and "FOUND MO POWA Bebha!"

Still trying to nail down an idle issue when hot, just craps out randomly - I'll post vid later also removing the sunroof for racing just cause!

Offline Teranfirbt

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Re: The Celica-gts.com Megasquirt Bible
« Reply #21 on: May 24, 2020, 08:16:07 pm »
That definitely looks like a better ignition map, certainly a good starting point. To get my MR2 map dialed in, I mounted one of those Bosch donut knock sensors to the side of the block and piped the signal into a headphone amplifier in the car. Sort of an advanced detcan. I was able to hear knock really well and tune it out over time. I would also ramp timing near the cranking area as it moves down the map toward idle. I've had issues in the past where it would crank, catch, and then run into a wall of more advance that would cause a hard start situation.

Next thing to start working on is your accel enrichment, it looks like you need more. Take data and dial in on the locations where you are opening the throttle. Pull up TPS, TPSDot, and AFM. If you see small lean or rich spikes after you have a throttle movement, your accel enrich isn't set up right. You'll usually get a little, but if your AFR spikes more than 0.5 away from where it was, you've got work to do. You've got it really dialed when you can move the throttle at any rate and your AFR ramps to your desired value and doesn't change.

On your idle issues, do you have AFR correction turned on? Let it idle and take note of how much EGO correction you have going on. Assuming you don't have a hardware problem, injector dead time is generally the culprit behind poor idle as conditions change, especially when it gets hot.

Injector dead time settings have a large effect at idle, having them wrong will result in wonky AFRs that require a lot of EGO correction as environmental conditions change (hotter air, coolant temp, etc).

If you need a lot of positive EGO correction as your air gets hot, you need more deadtime, if you go rich when your air gets hot, you need a little less. Change it in 0.1ms increments and take more data. It takes a lot of attention if you don't have or measure deadtime for your specific injector setup.

1983 Celica GT-S 2RZ swap: Deered 2014 :(
1986 Tercel 4WD 4AFE Swap: Going strong
1986 MR2: What a beast!
2014 Elantra GT: The reliable one

"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." ~ Albert Einstein

Offline TerrenceLP

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Re: The Celica-gts.com Megasquirt Bible
« Reply #22 on: Jun 03, 2020, 07:49:01 pm »
New tune file - https://drive.google.com/file/d/192vxALjbOZSOCQezovFGwEjqC9qOVl7p/view?usp=sharing

Addressed timing and now it is much better down low. Still working on Accel and Dead time although 1.000ms seems to be doing fine.

I did change the ideal back to open loop and there is no EGO correction at the moment.

Next will be a video walkthrough and startup.

Thanks again for all of your advice and input, now I feel the power!

Care to share your tune?