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Mustang Technical Discussion > Mustang Projects > Scarlet > Community Forums > Mustang Forum Australia - Mustang Tech

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Mustang King

Joined: Jun 29, 2011
Posts: 2939
Location: NSW

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hybrid wrote
Retard Timing- detailed instructions on integrating with MSD, J&S Safeguard, & other popular aftermarket ignitions

Probably a good idea for a carby since you have no other control, but how will it work on megasquirt or other ECU?
To me it seems like a complicated option when your ECU can do it all.

Instructions say has a trigger for factory and aftermarket ecu's

'You can never test fire too many times.' - Hybrid

'You can never have too many gauges' -

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Mustang King

Joined: Jul 27, 2010
Posts: 8584

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Ok, might be worth looking at in future for me if it monitors flow rather than pressure.

If my nozzle is blocked, I will still have water pressure but no meth. It's big and ugly though, so no idea where I would fit it.

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Mustang King

Joined: Nov 02, 2010
Posts: 4505
Location: Brisbane

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timing is key [thx hybrid reminding me]. So the Air temp ignition retard would be an important tuning protector. Also MS3 has good support for metered WMI control.

I will someday think of something clever to say.

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Mustang King

Joined: Jul 27, 2010
Posts: 8584

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Yeah originally I was going to use use air temp correction. I just wasn't confident it was going to do enough to save engine in the case of meth failure.
I'm not sure how quickly the IAT would react if meth was working, intake temps come down to 30 degrees, all of a sudden, meth dies. Air temp will rise almost instantly (except for latent cooling in manifold etc).
Will the IAT adjustments happen quick enough, or adjust enough to save it? Talking both fuel and ignition. Because remember we have to remove fuel to compensate for the 50% volume of meth. My tables in the other thread show how much fuel we took out of mine up top.

In the end my thoughts were that the table switching was much more flexible tuning wise. Allowing perfect adjustment for both conditions.
Not sure IAT adjustment will allow the same. I'm happy for it to be proven to work well - just not using my engine. Mr. Green Mr. Green Mr. Green

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