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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  #1  
Old 02-02-2009, 11:29 PM
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Old 02-03-2009, 01:20 AM
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you could probably make this work decent, but it looks like it intended for WOT drag racing setup. it injects a constant amount of fluid and is triggered at a desired boost pressure. i would think for this one you may want set it to come on between 20-25psi. maybe higher if you can cheat the pressure switch.
 
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Old 02-03-2009, 01:24 AM
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i was thinking 20 for towing
 
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Old 02-03-2009, 01:46 AM
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it would be trial and error but since it only injects a calibrated amount you might find that you need to up the adjustment so it doesnt over do it at the lower boost. this kit is worth checking out i ould maybe like to call and talk to them about it. plus they said they will have to set the nozzle to customer specs.
 
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Old 06-22-2011, 04:38 AM
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Cheap water meth set up would be...get a windshield washer tank and motor wire to a push button switch and use rainX. Iv had acouple diesel techs tell me about this, don't know if it'll work but I was gonna try it.
 
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Old 06-22-2011, 09:07 AM
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I am a bit new at all this; what is a "water meth"?
 
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Old 06-23-2011, 10:45 PM
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Originally Posted by odnob
I am a bit new at all this; what is a "water meth"?

Water/methanol injection. You spray a fine-misted fog of water/methanol into the intake horn just prior to the manifold, and it cools the air-charge beyond what the intercooler did for you.

Same principle as nitrous, but less expensive, since you can use cheap blue windshield-washer fluid. And safer, since the refrigerant effect isn't quite as severe as nitrous.
And, you can run it for more seconds continuously, as well


You can also use plain water, if there's no danger of a freeze up due to cold weather
 
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Old 06-25-2011, 11:41 PM
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Originally Posted by TheCumminskid
Cheap water meth set up would be...get a windshield washer tank and motor wire to a push button switch and use rainX. Iv had acouple diesel techs tell me about this, don't know if it'll work but I was gonna try it.
good luck finding a washer pump that exceeds manifold pressure.
 
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Old 06-26-2011, 06:51 AM
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Originally Posted by geddy's uncle
Same principle as nitrous
Not really.
 
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Old 06-26-2011, 09:05 AM
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Originally Posted by Drothgeb
Not really.
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.
 


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