Steve's Megasquirt/tunerstudio Help Thread

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BugsOli

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Hi guys, I've read pretty much all the pages but could'nt find a definitive answer to my question: I have an 87 GT Convertible with the following configuration:
- Stock 302
- Unknown cam (might be the stock one for all I know)
- Bigger throttle body (don't know the size of it but thinking 70 mm)
- Underdrive pulleys
- Pro-M MAF conversion with A9M ECU
- 19 lbs injectors
- OEM fan
I've scored a set of real GT40 heads that need some work, and I have a lower GT40 intake ported by T-Moss along with a real GT40 Cobra upper waiting to be installed.
Since I also scored a C&L MAF for 24 lbs injectors, as I wanted to have the air filter in the fender instead of inside the engine bay, I bought some used 24 lbs injectors on this site.
My question is: I'm willing to go the Microsquirt route with the 5.0 harness so I can monitor and tune my car, do you think it's well suited? I was thinking about going the QuarterHorse route but seeing how great this thread is, I might go with MS instead for ease of use.
My car will never see a turbo nor supercharger since it's forbidden here in Belgium to add anything that was not part of the engine when it came out :(
The only thing that I will add is an electric fan (I have a Mark 8 waiting on the bench) and I'll also probably reinstall a new A/C system whenever I get enough money (it's a standard A/C car and I've removed everything because it was empty anyway).
What are your thoughts? And if I need help, anyone would be willing to give me some advice please (I've already checked A91WHAT tuning videos ;))
Thanks guys!
 

stanglx2002

CT Material here
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Welcome to this side of the forum!!!

I have run both of the systems that you evaluating, and IMO I would hands down go with the MS System. The quarterhorse is good, and can handle what you looking for. The issue is that its a chip on the stock computer. I have been seeing more and more people having the old 30+ year old computers failing including myself.

The MS platform will also give you more options, tuning capabilities, and better software to do more with the car.
 
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For a mild NA set up the MS should be an easy tune. On your set up I'd suggest going with stock pulleys esp if you are still on the stock alternator. Its weak already and will get worse adding an electric fan. I'd look at a 3g or single wire upgrade. I'm loving the microsquirt so far in mine and I've got a much heavier modded and more of a challenge to tune and loving it. If you need help getting the idle and base tune set up I recommend a tuning/training session with @a91what
 
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BugsOli

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Welcome to this side of the forum!!!

I have run both of the systems that you evaluating, and IMO I would hands down go with the MS System. The quarterhorse is good, and can handle what you looking for. The issue is that its a chip on the stock computer. I have been seeing more and more people having the old 30+ year old computers failing including myself.

The MS platform will also give you more options, tuning capabilities, and better software to do more with the car.
Thanks mate for your quick answer!
Yes I have a bunch of friends down in the UK that have experienced bad ECUs due to the age of the components, and despite being an easy fix, I don't really want to rely on "old" tech for the future.
I'll keep the ECU of course, just in case.
 

BugsOli

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For a mild NA set up the MS should be an easy tune. On your set up I'd suggest going with stock pulleys esp if you are still on the stock alternator. Its weak already and will get worse adding an electric fan. I'd look at a 3g or single wire upgrade. I'm loving the microsquirt so far in mine and I've got a much heavier modded and more of a challenge to tune and loving it. If you need help getting the idle and base tune set up I recommend a tuning/training session with @a91what
Thanks, I should receive my new 130 amp alternator in a couple of weeks so I should be more than prepared
 
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stanglx2002

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Thanks mate for your quick answer!
Yes I have a bunch of friends down in the UK that have experienced bad ECUs due to the age of the components, and despite being an easy fix, I don't really want to rely on "old" tech for the future.
I'll keep the ECU of course, just in case.

Im doing the same with my other mustang as well pulling the stock one out and vacuum sealing it. Im going MS on both cars with MS2 on the black one and MS3 on the red one as its going to be a "little" more radical. Going to put digital dashs in them both tied to the MS to get rid of the stock gauges.
 
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a91what

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The Microsquirt will be able to do almost everything you will want it to do, the only issue with the micro is it is limited in its scope. You will want to be able to tell the ECU that the AC is coming on and such. this will require a small amount of modification to the wiring [a relay to change the 12v+ signal into a ground input to the ecu for the AC input] and we can also control the fan with the MS if that is something you would like to do. For an NA car the tuning will be very straight forward.
 
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Allbizns

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The Microsquirt will be able to do almost everything you will want it to do, the only issue with the micro is it is limited in its scope. You will want to be able to tell the ECU that the AC is coming on and such. this will require a small amount of modification to the wiring [a relay to change the 12v+ signal into a ground input to the ecu for the AC input] and we can also control the fan with the MS if that is something you would like to do. For an NA car the tuning will be very straight forward.

@a91what I am at the same cross roads. I am in the process of building a 347 for my 92 Coupe and will need a way to tune it. It will be a decent N/A setup with 10.5 to 1 compression and Trickflow 190 11R Heads. I will most likely have Ed Curtis grind a cam for it. The car does have A/C and cruise and a 5 speed. Not sure if I will add an electric fan or stay with the clutch.I guess my question is I have a few options a friend has an old Anderson PMS series 4 piggy back, The next options are the EFI Source Microsquirt or Stinger PIMPXS.
I am very interested in the Microsquirt set up but my concerns are does it have a way to control the IAC for idle. If not will it be an issue to get the car to idle decent with out it, or can it be modified fairly easily to control it. I am also interested in the options or modification you have listed above to signal A/C command and fan control. I was under the impression that the Microsquirt only had one input and one output left once hooked up. Do you feel this is a good source of engine control for a fairly mild N/A setup. I know the PIMPXS has way more capabilities but being N/A I am hoping the Microsquirt will do most of what I need.

I am fairly handy I have installed a Holley dominator setup on my Big block Nova and have been sucessfull on the tuning side of things so I think with some time and advice I could make the Microsquirt work. The other question is will the mods for A/C, Fan and possibly IAC control end up adding enough to the cost that it would get me close enough to just purchase the PIMPXS?
My goal is trying to stay within the cost of the Microsquirt if I can that is what is appealing to me with it.

Any advice is apreciated
 
@a91what I am at the same cross roads. I am in the process of building a 347 for my 92 Coupe and will need a way to tune it. It will be a decent N/A setup with 10.5 to 1 compression and Trickflow 190 11R Heads. I will most likely have Ed Curtis grind a cam for it. The car does have A/C and cruise and a 5 speed. Not sure if I will add an electric fan or stay with the clutch.I guess my question is I have a few options a friend has an old Anderson PMS series 4 piggy back, The next options are the EFI Source Microsquirt or Stinger PIMPXS.
I am very interested in the Microsquirt set up but my concerns are does it have a way to control the IAC for idle. If not will it be an issue to get the car to idle decent with out it, or can it be modified fairly easily to control it. I am also interested in the options or modification you have listed above to signal A/C command and fan control. I was under the impression that the Microsquirt only had one input and one output left once hooked up. Do you feel this is a good source of engine control for a fairly mild N/A setup. I know the PIMPXS has way more capabilities but being N/A I am hoping the Microsquirt will do most of what I need.

I am fairly handy I have installed a Holley dominator setup on my Big block Nova and have been sucessfull on the tuning side of things so I think with some time and advice I could make the Microsquirt work. The other question is will the mods for A/C, Fan and possibly IAC control end up adding enough to the cost that it would get me close enough to just purchase the PIMPXS?
My goal is trying to stay within the cost of the Microsquirt if I can that is what is appealing to me with it.

Any advice is apreciated

I've done a tuning session with @a91what and im using a microsquirt to control my IAC. It also has support for AC control and I also use it to trigger my dual contour fans. I get 12v to them via the coolant sensor then the ground for the fan relays is to the microsquirt that kicks them on at my set temp. I'm running a 306 HCI with a Vortech S trim. I worked with @a91what to get my cold start/idle pretty well nailed down then my IGN and AFR table built so now I can just let autotune adjust the VE tables for me and if you want to make a change can just adjust the AFR table and let it help dial it in. For the price the microsquirt seems tough to beat. I did also get the bluetooth module and then bought a copy of tunerstudio.
 

Allbizns

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I've done a tuning session with @a91what and im using a microsquirt to control my IAC. It also has support for AC control and I also use it to trigger my dual contour fans. I get 12v to them via the coolant sensor then the ground for the fan relays is to the microsquirt that kicks them on at my set temp. I'm running a 306 HCI with a Vortech S trim. I worked with @a91what to get my cold start/idle pretty well nailed down then my IGN and AFR table built so now I can just let autotune adjust the VE tables for me and if you want to make a change can just adjust the AFR table and let it help dial it in. For the price the microsquirt seems tough to beat. I did also get the bluetooth module and then bought a copy of tunerstudio.
Ok cool. Yes it sounds like @a91what really knows his stuff. Were you able to control the IAC and fans with basic relays and wiring? Or did you need to buy any special modules. It seems there is way more info out there about the PIMP or MS 2 or 3 and not much about the Microsquirt so it is great to be able to talk to some people sucessfully using it. Im sure I'll have more questions.
 

a91what

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The iac is already wired if you buy from efi source. The only function that is not wired in is the AC sensing for idle up. It can be tuned around if you dont want to hassle with it. The micro will have 2 wires left unused (from memory here so be kind) one will be labeled fans (output capable of 3amps and boost controller ect.) The other tach (also an output can carry .25amps enough to trigger a relay)
I believe that tach can also be used as an input but that will require me to get near my pc.

hmm can one of you guys that has a micro installed please recount to me what wires are not used and are extra [eg. fans tach ] and is/are pins 10&30 populated please.

Pin 10 is the ACCS on the factory harness and is the 12v+ input from the cycling switch for the AC
Pin 30 is the NSS and is pulled to ground through the sig rtn on pin 46 [feeds all the sensors as well]

Thanks!!


@Allbizns I will say this about that, IMHO you should get a pimpxs if you are looking for a plug and play solution and have it in the budget.... The MS3 is a vastly superior operating system. they tune the same but the ms3 is much better.
 
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Allbizns

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Jun 14, 2019
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The iac is already wired if you buy from efi source. The only function that is not wired in is the AC sensing for idle up. It can be tuned around if you dont want to hassle with it. The micro will have 2 wires left unused (from memory here so be kind) one will be labeled fans (output capable of 3amps and boost controller ect.) The other tach (also an output can carry .25amps enough to trigger a relay)
I believe that tach can also be used as an input but that will require me to get near my pc.

hmm can one of you guys that has a micro installed please recount to me what wires are not used and are extra [eg. fans tach ] and is/are pins 10&30 populated please.

Pin 10 is the ACCS on the factory harness and is the 12v+ input from the cycling switch for the AC
Pin 30 is the NSS and is pulled to ground through the sig rtn on pin 46 [feeds all the sensors as well]

Thanks!!


@Allbizns I will say this about that, IMHO you should get a pimpxs if you are looking for a plug and play solution and have it in the budget.... The MS3 is a vastly superior operating system. they tune the same but the ms3 is much better.

@a91what Thats seems to be the normal advice. :( I was hoping with seeing a few guys using it here it might have been a good option for my mild setup right now, as the pimpxs is not really in the budget at the moment. What is the biggest benefit with the pimpxs over the Micro for my mild set up. As I said earlier I am running a Holley dominator on another car that is N/A and I only use about .25 of the capability of the ecu.
Is the fact you can run sequential over batch fire one of the big reasons maybe processor speed also?. As long as it will control the IAC and I can configure it to idle up with A/C and control a fan that should be all I need for now and If I feel I need to upgrade down the road I will save at that point and make the switch. I assume If I chose that route my tune files should also work on the pimpxs?

Thanks again for the advice!
 

a91what

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All this talk you hear about processor speed is solely to sell you a product. Yes it does matter to a point but as long as the code written is done elegantly and is not bloated with nonsense it does not take much to execute the code for a car. Period.

You wont even use .25 of the MS3 capabilities on most builds. The holley (any of them) cannot run a coyote without add on boxes to control the vvt. The ms3evo (half the cost) can with no extras.

To your original point. There are tonnes of cars running the micro and doing it well. The ms2pnp is built using a micro processor. The issue with the cheaper pnp options (sealed case micro) is that some of the "extra" i/o is not available. They are being used for sensor inputs instead.

If you plan to run a basic 347 with Ac the micro can handle it. The only issue you will face is the AC input to the ECU. This input is only used to alter the idle strategy slightly, not a big deal. I have not personally installed one of these (all my tuning I do remotely) but I have tuned quite a few of them.

The tune would port over with some needed changes to output settings. (You have to setup what outputs are doing what)

There are many advantages to the ms3 sequential is one of them, the processor is superior as is the firmware. A sequential car will idle cleaner and can get better mileage, a 347 I tuned with a ms2pnp (micro based batch) just reported that after daily driving for a few months car is getting 18mpg.

Now if I can get one of these guys to check those pins for me... @Anti_Hero0932
 

Allbizns

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All this talk you hear about processor speed is solely to sell you a product. Yes it does matter to a point but as long as the code written is done elegantly and is not bloated with nonsense it does not take much to execute the code for a car. Period.

You wont even use .25 of the MS3 capabilities on most builds. The holley (any of them) cannot run a coyote without add on boxes to control the vvt. The ms3evo (half the cost) can with no extras.

To your original point. There are tonnes of cars running the micro and doing it well. The ms2pnp is built using a micro processor. The issue with the cheaper pnp options (sealed case micro) is that some of the "extra" i/o is not available. They are being used for sensor inputs instead.

If you plan to run a basic 347 with Ac the micro can handle it. The only issue you will face is the AC input to the ECU. This input is only used to alter the idle strategy slightly, not a big deal. I have not personally installed one of these (all my tuning I do remotely) but I have tuned quite a few of them.

The tune would port over with some needed changes to output settings. (You have to setup what outputs are doing what)

There are many advantages to the ms3 sequential is one of them, the processor is superior as is the firmware. A sequential car will idle cleaner and can get better mileage, a 347 I tuned with a ms2pnp (micro based batch) just reported that after daily driving for a few months car is getting 18mpg.

Now if I can get one of these guys to check those pins for me... @Anti_Hero0932
Sorry for adding confusion would I be wasting my time using my buddys Anderson PMS to get the car running and dialed in a little since its almost free and then save for a pimpxs. Rather then the micro. But my understanding is the micro still years ahead of the stock ecu with a piggy back.
I do have a little time so I guess I don't have to decide right now was just trying to gather all the info I can to see what my spending would be against my budget. If the right deal comes up I want to makesure a make an educated decision.
 

darkfader

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Just finished reading the thread. I’m still pretty confused but I think I learned a few things. Some quick questions.

I figure the stinger PiMPxs is what I want. My engine is currently under construction but the final specs are as follows:

Stock block .030” over, with SCAT 331 bottom end/ICON pistons.
Trick Flow 11R 190 heads
FTI custom cam
Holley Systemax II intake

What I don’t know is the fueling system. I’m assuming 30lb injectors and 240l/hr pump? I’m also planning to run contour fans and have air conditioning. The car is a manual and the end goal is a T-56, but I may run the T-5 until it fails or the budget recovers.

The car will be N/A for the foreseeable future, and is strictly for spirited weekend twistie driving.

During disassembly, the injector harness was damaged, most of the plastic tabs on the connectors broke so I want to replace that harness and it looks like Stinger offers a replacement engine harness that I’d be interested in adding.

Can the PiMP xs be set up for a safe initial startup once the new engine is in along with the replacement harness? No MAF needed for this?

Sorry for any dumb questions but I’m at this stage in the planning and I want to learn as much as I can, and I appreciate any help along the way.

@a91what I started watching your vids and plan to study but I’d definitely be looking to hire you for some remote tuning when the time comes.