Nitrous users: Second arming switch for Stage 2?

Testing and development of Megasquirt 3

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Matt Cramer
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Nitrous users: Second arming switch for Stage 2?

Post by Matt Cramer »

Had a customer asking if the MS3 could use a switch so the driver could select if it uses one stage of nitrous or two, depending on track conditions and how fast the racer expects his opponent to be. Could this be added to the code, and if so, how many nitrous racers would find it useful?
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dontz125
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Re: Nitrous users: Second arming switch for Stage 2?

Post by dontz125 »

Interrupt switch inline with relay 2's coil?
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racingmini_mtl
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Re: Nitrous users: Second arming switch for Stage 2?

Post by racingmini_mtl »

dontz125 wrote:Interrupt switch inline with relay 2's coil?
Except that this won't control the fueling and ignition retard on stage 2 since the code won't know it's disabled.

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dontz125
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Re: Nitrous users: Second arming switch for Stage 2?

Post by dontz125 »

Right. Stupid posting before first coffee ...
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jsmcortina
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Re: Nitrous users: Second arming switch for Stage 2?

Post by jsmcortina »

This might be a possible application for the "Race Profiles" feature I've talked about for a while. I put it onto the back-burner as nobody else seemed to find it interesting and we couldn't nail down a wish list.

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Jpierre655
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Re: Nitrous users: Second arming switch for Stage 2?

Post by Jpierre655 »

I could use this feature also. For now im having to engage solenoids by a button and have it also engage secondary timing map to pull timing.

I use the first stage to spool the turbo and may or may not want the second stage to come on unless needed.
frdstang93
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Re: Nitrous users: Second arming switch for Stage 2?

Post by frdstang93 »

This would be a feature I could use as well, I wouldn't mind being able to control up to three stages with each having their own specific input.
controlnut
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Re: Nitrous users: Second arming switch for Stage 2?

Post by controlnut »

I think that this would be very helpful. I have done several projects that are dry shooting nitrous but then there is no way to chose to run just stage 1. I also did a dual fuel (methanol/gas) engine with dry shot nitrous. The setup was one stage of nitrous but two different requirements for fuel. So stage one was use to supply the additional fuel for gas, and stage 1 & 2 for the fuel for methanol. After considerable effort I was able to modify the code so the dual fuel switch disabled stage 2 and the end result worked as expected. Another feature would be to have the flex multiplier work on the nitrous fuel so it would also adjust to the actual fuel being used.
shaodome
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Re: Nitrous users: Second arming switch for Stage 2?

Post by shaodome »

*waves* I also have a group of drag customers where this would be a great thing to have.
fj1289
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Re: Nitrous users: Second arming switch for Stage 2?

Post by fj1289 »

I would like to see this too. Would it be possible to set it up to be able to select just the "second" stage also?

Concept would be for stage 1 to be 40 HP for example and stage 2 to be 80 HP.

Then through a shift controller I could set up stage one only in 2nd and 3rd gear, stage 2 only in 4th gear, stage 1 + 2 in 5th gear

That could very helpful for the motorcycle crowd for drag racing as well as land speed racers.
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