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the share Megasquirt maps for ITB's thread

29K views 62 replies 28 participants last post by  ricardo.castilla 
#1 ·
With a lot of people (including myself) having received the techno toy tuning ae101/11 ITB adapter, it makes sense to create a repository thread where people can pick up a base map for Megasquirt.

I'm sure 90% of people will be running Megasquirt with the ae101/11's, and the only major differences from user to user will be engine displacement, injector size, and header/catback type.

Injector size can be easily changed, and the maps reapportioned automaticallyin Megatune, and there really isn't *that* much difference in headers, so a really well done map is likely to be pretty close for all those running the T3+ae101/11.

Afraid I don't yet have any maps to contribute, I'm waiting on my ae101's and megasquirt to come in, and to reassemble the car. If there are no maps floating around by then, I'll be the guinea pig, and have my car tuned by a local shop, and post the map.

Tuning a standalone, if you've never done it before (I have not) is easily the most imposing part of running ITB's, or forced induction. If we can get a good variety of maps matching up to the various exhaust setups, etc, then we'd have something like the Cobb accessport offers for subarus, evos, and MZR's - a download and go solution that the novice can handle.
 
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#8 ·
AEM EMS is ancient at this point. Which would be fine if they had dropped their prices to reflect the fact. But they haven't, and still charge over a grand. Why wouldn't you choose the more powerful, constantly updated ECU that costs half as much?
Does AEM even have the ability to use a custom TPS as the MS does? I don't know. If not, it wouldn't even work for this kind of setup.


on another topic: I'm going to be using 265cc purple tops from an NB2 - recommend this flow rate for those running the T3 ITB's. Provides plenty of fuel, and they are common, cheap, and plug and play. The nb2 injectors have a better spray pattern than the tan tops, but otherwise they're the same.
 
#15 ·
My apologies.. I tend to get off subject.. But with that said I have not see even one shared map yet on this thread.. Am I missing something, are they saved in a different location?
 
#20 ·
Thanks Brainy, you put that together stupid quick. I know it seems ridiculous I couldn't get over to Alexandria to pick it up, but I think you will understand when you've got an infant someday.

Anyone who hasn't gotten their MS yet, I *highly* recommend you get it from Braineack. He's built dozens of these things, and you haven't.

Couple questions Scott, I'll ask here so that anyone else who gets an MS from you can see.

1. On the Dsub connector, the wire on pin 15 is for the wideband signal, and I'm guessing that the wires on pins 1-4 are for the TPS signal - which pins on the toyota TPS do the wires go to?

2. You set up the MS to use a wideband, and I'll be using an LC1 right before the cat to get the tuning done. I've also got a narrowband o2 in the stock location - is this now superfluous? I've run LC1 a couple of years, and am wary about it being my full time o2 sensor, as I've already had one Bosch sensor failure. It makes more sense to me to get the tune sorted out with the LC1, and then use the narrowband for day to day closed loop operation. Thoughts on that? Would it just be the software setting change in MS, or would there be a solder change required?


Blu Man, please stay the **** on topic, you've already had posts deleted for this. And some advice - do not challenge Brainy on MS matters. He is smarter than you and can make that obvious to everyone.
 
#19 ·
Like i told Tronik and all the guys here YOU can use a 1.6 ITB map to start a 1.8 all day long .One of the MS guys here in Florida that tune the MS say he start out this way to get the car running .it is all in the ECU configuration and that is how you do it .MS2 map will work in MS3 If you know how to do the config .This come,s from a MS tuner that tune all kinds of car on this unit from 120hp to over 700hp .
SO IF YOU JUST DO NOT KNOW THEN YOU JUST DO NOT KNOW
l
 
#22 · (Edited)
Brain - No, there wasn't a diagram, but hey np, you just told me what would have been on it, right.

Over in the other thread, 90R was saying that one could splice the connector from a 94-97 mx5 TPS connector to the oem 1.6l TPS harness and just plug it straight in, skipping the IDL pin on the toyota TPS.

Based on FSM's of both cars, the diagram would look like this.

****EDIT - my diagram was wrong. see post below.

Though no one could say if it required the changes to the MS Pcb you mentioned. I'm guessing that if you say it needs it, it needs it. I searched on miataturbo but couldn't find any pics of the resistors/jumpers needed. Does a guide exist?
 
#23 ·
Based on looking at the wiring diagrams of the 90-93 5spd and auto TPS, and the 94-97 TPS (which even shares a plastic connector with the toyota TPS), and reading joe perez's tutorial here,
I'm confident that I know how to wire the TPS end of things. And the diagram above is wrong. Here is the amended diagram.




So now all I need to know is how to mod the megasquirt PCB. There was discussion of that in the mturbo thread, but it was on old hardware, and the resistors/pins are no longer in those locations.

Hopefully this is something Braineack can show us, and then the whole TPS bullshit can be put to bed for all of us with the AE1*1 ITB's.
 
#24 ·
I think you got it.

Inside the MS unit, there will be a 1K resistor betwen 4L and 4D, snip that out.

Along the bottom row of the mainboard there are a bunch of holes that the jumpers form the connector board are going to. Locate vref (should be between 12v and 5v) and use the extra red wire and solder a jumper from that spot (vref) to 1N.


That will send 5 volts through the spot labeled POW.
The TPS signal back to the MS will go through the spot labeled IDL.
The ground will come from TL.

Just make sure to splice accordingly.

I would have added the jumper wire for you, must have slipped my mind that you mentioned going vTPS. I leave the power wire out so in case someone doesn't go vTPA with a 90-93 the **** doesn't hit the fan. If the connector stays in place the 5volts actually ground out and the injectors tend to lock open.
 
#29 ·
Braineack i bet you build like a million MS's since you repaired/rebuilt mine but do you remember if i had to do any re-wiring on mine . It was for a 94 , I have the print out you sent with it and it doesn't call for any wiring just some setting up using the computer .

I'm getting ready to swap motors into a cleaner shell and figured it would be a good time to do the ITB install .
 
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