Auxiliary Injection The place to discuss topics of water injection, alky/meth injection, mixing water/alky and all of the various systems and tuning methods for it. Aux Injection is a great way to have a reliable high power rotary.

tuning AI as "backup"

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Old Jan 28, 2008 | 06:41 PM
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tuning AI as "backup"

how woul you go about tuning a car and using AI as a safety thing and NOT part of the fuel map?
so u do fuel map first and then turn on the power to AI?
if u do it that way how will it affect AFRs u dialed in already? (assuming im running alcohol/water)?
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Old Jan 28, 2008 | 07:11 PM
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you will run richer, how much ai you inject will determine how much richer you run, most likley with no tuning you will loose some power
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Old Jan 28, 2008 | 07:25 PM
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ima be running with a progressive controler. how do u guys think i should tune it?
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Old Jan 29, 2008 | 08:14 AM
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what progressive controller?
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Old Jan 29, 2008 | 08:16 AM
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devils own
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Old Jan 29, 2008 | 08:44 AM
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slo's comments are correct. if you are tuned and add AI without chnges in your tune you will be rich. how rich depends on the amount of injectant. you will lose power. if you retune you will regain your proper afrs and power along w a safer motor condition.

hc
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Old Jan 29, 2008 | 10:06 AM
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so i should tune with AI from the get go?

http://www.alcohol-injection.com/pro...roller-14.html

thats what im using by the way. i wanna use s5 na rotors turbo.
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Old Jan 29, 2008 | 10:56 AM
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Tune without it on. Then just add water. Then double check your tune...
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Old Jan 29, 2008 | 11:31 AM
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^I was going to ask about water....but that pretty much summed it up
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Old Jan 29, 2008 | 12:34 PM
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what about washer fluid?
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Old Jan 29, 2008 | 02:27 PM
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washer fluid is just meth water, its the same as mixing meth fuel and water.

Even if using pure water you will still loose power, the reason being is that water allows you to run leaner than you normally would without risk of detonation. so lets say you lean out by 5%, this will net you some additional power, you can also advance the ignition further in boost than you normally would netting further power.

If the water goes away your still lean by 5%, and advanced from what would be optimized.

If you take an already optimized tune and just inject water in on top of that than the tune is no longer optimized (not optimized for water) and you will loose some power.

If you can live with the minor power loss with the benefit of addition safety margin, than you should be fine with either water or water alcohol mix, or even pure alcohol (methanol ethanol whatever) in small amounts.

Last edited by slo; Jan 29, 2008 at 02:33 PM.
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