MegaSquirt II Successfully Running on 7M-GTE!!! (Lots of pics and walkthrough)

blackout_89t

King of the roll
Apr 25, 2005
488
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Toronto
Hey I was curious where you purchaed the bulk coloured wires to make your harness?

Some MS distributor's websites have the universal harnesses, but I want to use the relay board so I can't use that harness. I suppose you could always buy the harness and cut the plugs off and use just the wires since they are colour coded and stamped....

So yea, where did you get your wires from? I can't find colour coded wires anywhere...
 
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Clifton

New Member
Apr 5, 2005
134
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Scottsdale, Az
Alot of Z (S30) guys run this too but I haven't seen a 7M with it. You inspired me:naughty: I got an ECU coming, just need to gather everything else up. Were did you get the trigger wheel? I'd rather not fight a pulley of at the J/Y. I've seen some but not just the ring.
 

87_7MGTE

SOLD :(
Mar 30, 2005
278
0
16
Bellingham, WA
This still works awesome, even better though with all the tuning Ive done. Cold starts pretty well with the right enrichments.

Clifton: I got the trigger wheel from an escort with edis on it (i forgot which years exactly)
 

streetknight

rip ssb
Mar 30, 2005
157
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melbourne, fl
how much power are u making now after u got it tuned?
i installed ms 2.2v in my e30 just fuel and have not tuned it yet. i have to say im thinking of going all the way with ms also. its a great standalone. well done man.
 

Adjuster

Supramania Contributor
I know Duane's car has the bell crank pully machined to create the trigger wheel, but you'd need to know exactly where to cut the "6th" notch before you machine it as there would be no going back to change or adjust it later. (Unless you make the mount adjustable, that would allow for minor changes and get your timing right where you want it for baseline.)

Very interesting setup. I'm tempted to sell off the Eman and E-01 and bite the standalone bullet. (Already have the PLX wideband, and I'd just use the stock ISC valve, but I really think COP is the way to go. No more wires, and better packaging from what I can see. The variable is finding OEM COP's that are the right height for the 7M block, and can fit between the stock valve covers width wise.

Does this standalone control boost? I did not see any valves wired in, just the 3bar map sensor. (I'm assuming your using that along with the IAT to get your fuel map, so no more AFM needed.)

On the "Econ" setting for the HVAC, I think that's the perfect button for the hidden alarm/theft system. (If you don't have it either on or off, the car does not run. Period.) Or you could use it for the "stealthy" nitrous setup. I never use it, so would not miss it at all.

One question about your AC. I know the MSII will control your compressor clutch and additional fans, but does it monitor the high and low pressure switches? If not, your running around with a time bomb in the AC system. (Too high and you burst hoses and seals, or too low on the pressure and you fry your compressor.) I really like having AC, and will not give it up to have a standalone.

Thanks for the answers in advance. :)
 

Clifton

New Member
Apr 5, 2005
134
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0
Scottsdale, Az
Adjuster said:
One question about your AC. I know the MSII will control your compressor clutch and additional fans, but does it monitor the high and low pressure switches? If not, your running around with a time bomb in the AC system. (Too high and you burst hoses and seals, or too low on the pressure and you fry your compressor.) I really like having AC, and will not give it up to have a standalone.

Thanks for the answers in advance. :)

MS doesn't nees to control the high and low on the a/c. It is in series with the power to the clutch. If it the pressure gets to high or to low the switch just cut's power to the clutch, there is nothing to monitor. On mine I have my a/c switch power going to the 7M ecu to idle up and straight to the clutch through a H/L switch on my dryer. I will probably just set my idle a little higher and not run the IAC.
 

williamb82

Member
Apr 24, 2005
906
4
18
42
Tampa, Fl.
well, my ms is almost done, was gonna run the ms 1 with the stock cps, ignitor and coils for now, then do the dual ignitor mod for the cop later. though now that the ms2 can use the stock cps im ordered the ms2 daughter card today along wit hthe stimulator kit so the ms can be tested now to make sure there are no probs and in the future should any arise. i got the gm coolant and air temp sensors and a 4bar map as im going with a gt4088. i hope to have it on a stockish 7mgte for a lil while to learn the tuning before i build the race motor.
 

Adjuster

Supramania Contributor
So, we can use the stock CPS, ISC, TPS, a GM MAP sensor and IAT sensor and if we want, run COP for the coils, or use the stock ones with a seperate box to control them?

Sounds too good to be true at the prices being discussed.

No need to create an ignition trigger would be a huge time saving step, even if you had to buy a seperate "box" to create the signal, or modify it so the MSII can "see" it.
 

williamb82

Member
Apr 24, 2005
906
4
18
42
Tampa, Fl.
well, i had the ms&s, thoug h abuddy of mine said he has his ms2 working off the stock cps on his 4ag, so dont see why it wont on the ms2. either way ill get it working, ill post the specifics once its tested and working.

http://www.diyautotune.com/catalog/megasquirtii-engine-management-system-wpcb3-unassembled-p-59.html

on a side note, a friend of mine juts put a microtech on an 87 turbo, and he nees the pinouts of the plugs under the dash so he can hook up the tach and whatnot. anyone have that info or a link to a site with it?
 

williamb82

Member
Apr 24, 2005
906
4
18
42
Tampa, Fl.
adjuster, megasquirt has a link to the circuit to build to use the toyota sensor. my buddy dave is building that inside my ms box, so its all 1 unit. :D i hope to have it ready VERY soon. then ill sell the maft and safc2 to buy other mods i need.
 

87_7MGTE

SOLD :(
Mar 30, 2005
278
0
16
Bellingham, WA
StreetKnight: i have not dynoed my setup yet. i plan on dynoing my car probably within the next 2 weeks, i will post the results then.

Adjuster: The MSnS-e (MegaSquirt n Spark -Extra) can control boost, but its on the MegaSquirt 1 processor only. i have heard rumors that the MSnS-e is going to be ported to the MSII processor, but who knows if it really is. yes, the IAT sensor and MAP sensor gets rid of the AFM. I dont have the a/c compressor hooked up right now just for that reason, i have to find a way to release the pressure. if anyone has any ideas, lmk, that would be awesome!

also, i dont think MSII can run our CPS YET...the next code version (2.5) will support wheel decoding and then we will be able to use our CPS. msns-e has wheel decoding built in already, but i went with MSII because its newer and more powerful, and this is what people will be developing on for a while now.

sorry for the late replies

ninja edit: william, all the harness pinouts are here: http://www.supras.nl/index.php?option=com_content&task=view&id=34&Itemid=50
 

87_7MGTE

SOLD :(
Mar 30, 2005
278
0
16
Bellingham, WA
william, is your friend using the beta code that supports wheel decoding? the latest stable release is 2.34, which doesnt support wheel decoding. the next release (which is 2.5 or 2.64, i forget) will support it. there is a beta version of this code floating around, but it is unstable and unreliable over 6000 rpm.
 

williamb82

Member
Apr 24, 2005
906
4
18
42
Tampa, Fl.
then ill use the msns+e till they have a stable code for the ms2, then ill plug in the daughter card and retune wit hthe added parameters.
 

Adjuster

Supramania Contributor
This is very tempting.
Buy the Ebay Masterpower turbo, use the Ebay manifold and wastegate, and use the money I've saved v/s the GT4088r turbo and go with the MS standalone. (Once they have the CPS possible software upgrades, or daughter board etc.)

No more AFM, the ability to tune based on AF ratios, raise the rpm limits to where I determine they should be for this motor/turbo and fuel setup, and in the future, if I add more injectors, or swap out larger ones than the 550's I have now, it should be no huge deal to re-tune for more fuel.

If the high/low pressure switch on the supra is a simple relay cut for the compressor clutch relay, then wiring up the AC on this standalone is no problem. (Just need to up the idle speed slightly when the AC is on. Does the MSII allow for that if your using the ISC? I would think all you need to do is increase the stepper motor pulse count to get the idle speed you want with AC on or off. )

So, no boost control with the MSII. I should read everything about it, but have not had the time. How many "extra" input/output connections are left over when you've wired it up for the Supra? (Don't most of these stand alone computers have a few analog connections so you can wire up sensors to turn things on or off depending on sensor data? That is what I was wondering about the AC. If we needed to wire up the pressure limit switch to kill the AC if it was too high or low etc.) But these same connections could be used to turn on methanol injection for example. Or turn on cooling fans at certain coolant temps and just about anything else you could want if there is a signal and controller involved.

Does this standalone look at, or monitor knock sensor data? Can you adjust your timing advance based on knock? If so, it would be nice to let it float a more agressive timing advance and pull timing as needed to control detonation, especially if it's scaled to the amount of knock. (IE, very little knock, and less timing advance is pulled, v/s lots of knock and it pulls more timing accordingly keeping the engine alive with any fuel you might be running at the moment. There are many times I've not been able to run Toulene while traveling, and the fuel quality sucks, so I can't run as much boost. I don't want to have to retune the computer everytime I'm out of town. It should be as simple as turning down the boost level, but that only solves part of the problem, especially if your boost tends to spike even when turned down. These little spikes are no problem on good gas, but could prove to be a disaster when running 91 octane crap gas. The methanol injection will help here, but I don't have that system in place yet. :)

Too many mods to do, and no time and/or budget to complete them.
 

87_7MGTE

SOLD :(
Mar 30, 2005
278
0
16
Bellingham, WA
Adjuster: if you wire in ISC, there is either 0, 1 or 2 extra input/outputs left (i have to check this when i get home, unless someone else chimes in). I dont know about the AC, although if you figure this out, I would like to know because i would really like to have AC back. as for knock, yes it can monitor knock and i think it will adjust timing to what it/you see fit.

also, i just found this link on the msefi forum: http://www.msefi.com/viewtopic.php?t=15756 , direct link: http://www.megasquirt.info/ms2/betacode.htm . it contains links to the beta 2.54 and 2.63 MSII code, which should allow you to do wheel decoding and all that other good stuff. but this code looks like it has a few problems, so use at your own risk

i hope some of this helps, and let me know what you find out, id love to see a few more of these MS Supras around!
 

Clifton

New Member
Apr 5, 2005
134
0
0
Scottsdale, Az
MSII can monitor knock, just not control timing based on it. Yes the a/c is that simple. The switches are already in the stock system. All the 7M ecu does is bump the idle up. That's all. I don't remeber were they are (I don't have a MKIII) but they are on the high pressure side somewere.