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Old 11-28-2007, 12:29 AM   #1
superfast_wrx
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Default meth? nitrous? both? need advice

HEy guys i am new to the meth and i have a quick question i have a 02 wrx with intake exhaust cobb ap ver2 and a fmic with a nitrous intercooler spryer set up i was wondering if it would be better to go to meth injection or stay nitrous or even both? just need some advice thanks.
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Old 11-28-2007, 11:15 AM   #2
superfast_wrx
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bump.
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Old 11-28-2007, 12:04 PM   #3
anickode
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I had this crazy idea a while back to set up a wet nitrous system that injects nitrous and methanol instead of nitrous and gas... couldnt afford to do anything with it though. If you're interested in experimenting with that, I'll help out.
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Old 11-28-2007, 04:16 PM   #4
superfast_wrx
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either that or have a nitrous intercooler sprayer and meth injection
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Old 11-28-2007, 04:18 PM   #5
anickode
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If you're gonna have a nitrous system on your car, you might as well spray it into the intake, that way you get both the cooling AND the oxidizing effects of it. Use the Meth on top of that, and I think you've got a winning combination
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Old 11-29-2007, 06:06 AM   #6
MattPersman
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only downside I see of the nitrous is the cost to keep filling that magic bottle
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Old 11-29-2007, 07:25 AM   #7
anickode
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ahh, but on the plus side of nitrous, you don't have to use it all the time. It's there when you want it
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Old 11-29-2007, 12:17 PM   #8
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Quote:
Originally Posted by superfast_wrx View Post
HEy guys i am new to the meth and i have a quick question i have a 02 wrx with intake exhaust cobb ap ver2 and a fmic with a nitrous intercooler spryer set up i was wondering if it would be better to go to meth injection or stay nitrous or even both? just need some advice thanks.
Water methanol injection is particularly important with you running a shot of nitrous. This will help stabilize the combustion process slowing down the flame propagation when both on and off nitrous helping to reduce detonation and keeping the tops of your pistons and upper rings cooler.

When you inject water/alcohol the alcohol portion provides instant cooling (as it quickly evaporates), added fuel, increased octane (when used with pump gas) and burns as part of the combustion process while reducing combustion temperatures and EGT‘s. It should be noted that alcohol has a much lower latent heat of vaporization then water therefore it begins to evaporate instantly when injected into a hot air charge.

Water on the other hand has a very high latent heat of vaporization.

Definition of Latent Heat Of Vaporization: “latent heat” is the amount of energy in the form of heat released or absorbed by a substance during a change of phase. (i.e. solid, liquid, or gas), - also called a phase transition.

The energy (heat) required to turn water into a steam (to begin evaporating) is substantially higher then that of alcohol. When atomized properly water alone works well at cooling air charge temperatures. However, when compared to alcohol, testing has shown water does not have as great of a cooling effect on the air charge temperatures as does alcohol. When water does evaporate it turns to steam. This steam stabilizes and slows the combustion process acting as a anti-detonate (suppressing detonation) essentially making it an effective octane enhancer.

Together, water alcohol injection cools the intake air charge temperatures, reduces combustion chamber temperatures, thus cooling and protecting the top of the pistons and the top ring as well as lowering EGT's and cooling the exhaust valves.
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Old 11-30-2007, 06:27 AM   #9
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ahh, but on the plus side of nitrous, you don't have to use it all the time. It's there when you want it
but once you use it you want it all the time

my car is set up with meth that way. I can just reflash with AP in seconds, turn off my pump and be on pump.
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