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Old 06-04-2015, 11:47 PM   #1
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Default Using MS2 to drive a nitrous system

I've been tinkering around with the idea of running an old nitrous kit i've got laying around on my car for grins. I've been doing a lot of reading and i've got some questions for you guys.

From my research i've found that the MS2 can be used to control a nitrous system and allow you to meet a much more strict activation criteria than your basic WOT and rpm window switch set up.

So my idea is as follows. I've got a Rev built MS2 that came with 7 wires on the black connector. According to his initial setup instructions I think I can use 2 of them to get this done.

Grey wire: FLEX port, this will get connected to ground by a throttle body mounted WOT switch. This will be the input signal for the nitrous system on the megasquirt.

Orange wire: ALED port, when this output activates it grounds. So I should be able to drive the solenoids relay with this wire by hooking the the #30 ground pin of a 4 pin bosch style relay to it. Does that sound correct?

So here is where I'm getting lost. When I open up the nitrous system option in Tuner studio I'm not seeing any ALED port in the drop down box. Should that be there?

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Old 06-05-2015, 01:27 AM   #2
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Why do you need a WOT switch when you have the TPS?
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Old 06-05-2015, 07:24 AM   #3
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In Rev's directions it says "Switchable map or launch control, port FLEX. Connect this to a ground (through an on/off switch) to switch between VE/Ignition tables."

A WOT switch was the first thing that came to mind, but I'm definitely still in the learning phase here so I am open to suggestions.
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Old 06-05-2015, 08:28 AM   #4
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I think you'd want a rocker switch to make it switchable. Without adding any new switches or sensors you can already make it only come on at WOT. And you should be able to use the nos function itself to switch the map. Either with a built in function or just having the output loop back to an input.
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Old 06-06-2015, 12:15 PM   #5
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A/C button if you'VE deleted it.
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Old 06-06-2015, 12:30 PM   #6
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Use a switch to disconnect you wot throttle so you can turn it on and off.
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