Starting from scratch - which option to go, OEM or megasquirt ?
#21
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Micro is basically the entry-level version of Megasquirt. Its based on the MS2 and is basically the bare minimum needed for a stand-alone. It uses the same software as all of the others, including MS3-Pro.
It uses batch firing and has far fewer input/outputs and is lackluster on additional features. It can still do quite a bit.
Here is a basic run-down. There isn't a lot of detail, but its a high-level overview.
https://www.diyautotune.com/support/...tems-compared/
It uses batch firing and has far fewer input/outputs and is lackluster on additional features. It can still do quite a bit.
Here is a basic run-down. There isn't a lot of detail, but its a high-level overview.
https://www.diyautotune.com/support/...tems-compared/
#23
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#25
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You should be able to use one of the older cruise control boxes on a cable driven TB and it work fine.
You only need 2 signals from the ECU, and depending on which cruise box you use, one of them is irrelevant. The other is VSS signal. If you can send the same signal that goes to your speedo to the cruise control box, you should be able to use megasquirt and cruise control no problem at all.
You only need 2 signals from the ECU, and depending on which cruise box you use, one of them is irrelevant. The other is VSS signal. If you can send the same signal that goes to your speedo to the cruise control box, you should be able to use megasquirt and cruise control no problem at all.
#26
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I forgot to mention, if you find a cruise box that doesn't have a wire in the connector going to the H terminal, then it will work fine with microsquirt. The only signal it will need from there is the speedo signal.
#28
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Good info. In my case, I'm using a DBW TB. I was under the impression that DBW TB's need native (PCM) control for cruise.
Insofar as A/C, I know it can be run independent of the ECU/PCM...but it's nice to have all of the features afforded by PCM control (WOT cutout, fan control, idle bump, etc). I know there are work-arounds, such as RPM window switches, etc. Just trying to get educated.
Thanks again for the good info.
Tipsy
Insofar as A/C, I know it can be run independent of the ECU/PCM...but it's nice to have all of the features afforded by PCM control (WOT cutout, fan control, idle bump, etc). I know there are work-arounds, such as RPM window switches, etc. Just trying to get educated.
Thanks again for the good info.
Tipsy
#30
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Only standalone I've seen with cruise and DBW has been Proefi, any others aside from OEM doing it? Wish the 'squirt guys would do DBW at least as I've got an Sti swapped Subbie that needs it!
#33
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No cruise though right? I think the Poefi is the only one that does it aftermarket, I know AEM doesn't. Motec might but $$
If cruise is really important as well as DBW the OEM becomes attractive honestly. Standalone allow for realtime programming too which I don't think any OEM will allow?
If cruise is really important as well as DBW the OEM becomes attractive honestly. Standalone allow for realtime programming too which I don't think any OEM will allow?
#34
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No cruise though right? I think the Poefi is the only one that does it aftermarket, I know AEM doesn't. Motec might but $$
If cruise is really important as well as DBW the OEM becomes attractive honestly. Standalone allow for realtime programming too which I don't think any OEM will allow?
If cruise is really important as well as DBW the OEM becomes attractive honestly. Standalone allow for realtime programming too which I don't think any OEM will allow?
#35
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^^^As long as you remove the DBW throttle body and replace it with a cable unit.
Also, Be vewy vewy careful about attaching an actuator device to the throttle body.....Especially a non stock controlled device.....Think about what might happen if it yanked to WOT at an unexpected time......Make sure the brake interlock device is connected !
Also, Be vewy vewy careful about attaching an actuator device to the throttle body.....Especially a non stock controlled device.....Think about what might happen if it yanked to WOT at an unexpected time......Make sure the brake interlock device is connected !
Last edited by gjestico; 10-14-2016 at 08:51 PM.
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I was one of the inventors of the 60-2 (GM-58x) in 1984 used on the later GM LS engines AFTER the patent expired.
Thus I also have experience with the GM-24ex Crankshaft Indexing.
MY customers race in the BAJA, Dunes, and the Donut Shops.
What I have found whether my ECU, DIY ECU, or other EMS is fitted, you will need to "trim" the Spark Instant for "0" TDC.
This can be problem unless a TDC "0" mark is installed on the engine at time of assembly.
The average " trim" is +11 to +13 degrees, a large amount with a 24ex TW.
The chance to fit a 58x (60-2) TW is also possible when the engine is apart, a VERY good choice.
Lance
Thus I also have experience with the GM-24ex Crankshaft Indexing.
MY customers race in the BAJA, Dunes, and the Donut Shops.
What I have found whether my ECU, DIY ECU, or other EMS is fitted, you will need to "trim" the Spark Instant for "0" TDC.
This can be problem unless a TDC "0" mark is installed on the engine at time of assembly.
The average " trim" is +11 to +13 degrees, a large amount with a 24ex TW.
The chance to fit a 58x (60-2) TW is also possible when the engine is apart, a VERY good choice.
Lance
#37
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although if retaining DBW and an aftermarket ecu, it might be as handy to just install a retrofit cruise system. Would save using up any I/O's on the ecu as you'd need 2-3 to do cruise safely ( ie clutch switch, brake pedal switch and maybe some others so cruise would de-activate if either are touched. )