'99 Needs a turbo - MS-I or MS-II?
#1
'99 Needs a turbo - MS-I or MS-II?
Hi all,
I'm looking at engine management for a future turbo installation. Before I moved to California, I had planned to install an MS-I with an NA CAS in parallel with the stock ECU. This was to give me OBD-II for emissions (set it and forget it).
I have all the parts, and the wiring in place, but I haven't installed the sensors or physically mounted the Megasquirt.
Now I'm in California, and have CARB issues to consider. I'm trying to decide how to approach engine management, given this new constraint.
Two of my options involve Megasquirt.
I'm also considering CARB EO legal options, or legal enough options, but for the purposes of this thread, assume I'll be switching back to stock on emissions days.
I'm looking at engine management for a future turbo installation. Before I moved to California, I had planned to install an MS-I with an NA CAS in parallel with the stock ECU. This was to give me OBD-II for emissions (set it and forget it).
I have all the parts, and the wiring in place, but I haven't installed the sensors or physically mounted the Megasquirt.
Now I'm in California, and have CARB issues to consider. I'm trying to decide how to approach engine management, given this new constraint.
Two of my options involve Megasquirt.
- Continue as planned with the MS-I
- Sell the MS-I and go with the newer MS-IIl technique
I'm also considering CARB EO legal options, or legal enough options, but for the purposes of this thread, assume I'll be switching back to stock on emissions days.
#9
I'd probably sell this one and buy/build a replacement, as long as the cost wasn't outrageous.
That aside, it sounds like the advantages are AC & alternator control + the ability to read NB sensors.
Since I've got the NA CAS, and a parallel install takes care of AC & alternator, is there a strong reason to move to MS-II?
That aside, it sounds like the advantages are AC & alternator control + the ability to read NB sensors.
Since I've got the NA CAS, and a parallel install takes care of AC & alternator, is there a strong reason to move to MS-II?
#10
I've been reading all the NB MS-I and MS-II threads I could find, and this is my take.
MS-II:
MS-I:
Some people (AbeFM) seem to really hate the NA CAS option. I've got the parts and was planning on going down this route.
How serious of an issue is it?
MS-II:
- Ease of installation (reads stock sensors)
- "Smoothness" (more processing power?)
- The PNP kit from DIY provides idle/AC/alternator control
MS-I:
- Some report too much error when using an NA CAS. The alternative to the CAS is customized crank wheel. Sounds like a hassle.
- Needs custom circuits or a parallel installation for idle/AC/alternator
Some people (AbeFM) seem to really hate the NA CAS option. I've got the parts and was planning on going down this route.
How serious of an issue is it?
#11
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Dimitris
#12
I see. When I read the article, I assumed those mods were included.
In my case I'll likely install in parallel and let the stock ECU deal with all that.
In my case I'll likely install in parallel and let the stock ECU deal with all that.
#13
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While a parallel installation seems to work best, there are a few problems here and there. I had wild idle oscillations when I had the A/C activated during idle, or when I had major electrical loads also applied during idle (heated rear window and mirrors, heated seats, high beams, etc). I never managed to solve them while I was running in parallel.
Dimitris
Dimitris
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