5.9L 12V Performance Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps Related to Performance and Longevity

water meth

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Old Jun 27, 2011 | 03:57 PM
  #11  
Drothgeb's Avatar
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Originally Posted by geddy's uncle
Cools the intake charge, is what I meant.

Yes the methanol counts as a fuel, where the nitrous counts as an oxygen source.

Yes, the nitrous is a more pronounced refrigerant than the water.

Those are details intrinsic to the materials themselves, but how, in principle, do the goals differ?

Unless I'm mistaken, water injection dates to WW2 aircraft, and some wise guy said, "that's neat, but I bet laughing gas would be more interesting"

Same principle. Different details.

Like the evolution from James Watt's steam engine to the modern internal combustion engine. The principles still apply.
You are correct on some points, but mising others.

Nitrous is mainly an oxidizer. It only works when you have more fuel than you can burn with the air supplied by your turbo. The refrigerant portion is more of a side benefit, it does help a little, but that's not it's purpose.

Meth is a fuel. It also has the side benefit of cooling the air charge, but that's not it's purpose.

Water is injected to cool the combustion process in the cylinder, not the air entering the cylinder. If it coverted to steam before it enters the cylinder, then you're losing most of it's benefits. The trick with water, is to have the droplets just the right size so that it enters the cylinder as a liquid and is converted to steam during the combustion process. The conversion to steam absorbs heat. One of the side benefits is that the bursting micro-bubbles help agitate the fuel as during combustion.

Nitrous = oxidizer, Meth = fuel, Water = coolant. Yes they are all sprayed into the engine, but for completly different reasons.

The cool thing is, that since they all do something different, you can use all three at once! Water/meth does a great job of buffering the nitrous. You still get a complete burn, but it's spread over a longer period of time. It's much easier on your engine for a given power level, than nitrous alone.
 
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Old Mar 28, 2012 | 07:55 PM
  #12  
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Does your timing matter with the water methanol and how much difference does it make between spraying water or water meth?
 
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Old Mar 29, 2012 | 03:12 PM
  #13  
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way to bring up a dead thread. no timing doesent i ran water for temps but in the winter i ran washerfluid to prevent freezing
 
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Old Mar 30, 2012 | 07:15 PM
  #14  
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Haha sorry I didn't realize how long it had been
 
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