Meth/water ratio

plague · 08-15-2011, 03:23 PM

A little write up i came across discussing the benefits of both methanol and water individually and in essence, together. It is in support of an 80/20 mix according to the its reasonings.

http://rusubaru.com/how-much-alcohol-methanol/

In order to run say a 75/25 mix, can anyone meanwhile advise me of the proper calculations according to the WEIGHTS of both water and methanol, as it is the proper way to measure as opposed to fluid VOLUME. thank you

soulja620 · 08-15-2011, 03:26 PM

very nice find..

thank you i needed this

plague · 08-15-2011, 03:32 PM

Quote:

Originally Posted by soulja620

very nice find..

thank you i needed this

no problem, i thought it was moderately valuable in information and was in cookie cutter terms so it was useful.

Jeff@TopGearSolutions · 08-15-2011, 03:46 PM

Cliff notes:

80/20

10GPH nozzle on this car

plague · 08-15-2011, 03:53 PM

Quote:

Originally Posted by Jeff@topgearsolutions

Cliff notes:

80/20

10GPH nozzle on this car

yerp..

now BUMP for my question!

Syndicategt · 08-15-2011, 04:09 PM

Just FYI for you track guys. Certain groups like NASA & NCRC will only let you run a 50/50 mix.

SSIMPS · 08-15-2011, 04:26 PM

Quote:

Originally Posted by Syndicategt

Just FYI for you track guys. Certain groups like NASA & NCRC will only let you run a 50/50 mix.

really? how strict are they/how do they "know" whats in your drum/tank

plague · 08-15-2011, 04:33 PM

Quote:

Originally Posted by 135iSB

really? how strict are they/how do they "know" whats in your drum/tank

they must just take your word for it lol.

Syndicategt · 08-15-2011, 04:39 PM

Quote:

Originally Posted by plague

they must just take your word for it lol.

Yes they do, but for people like me with lots of integrity, it's hard to lie to them. I just show them my boost juice containter if they ask.

I run x2 1.0mm nozzels either 50/50 daily/track or 75/25 for drag.

Slidewayz · 08-15-2011, 04:51 PM

Quote:

Originally Posted by plague

A little write up i came across discussing the benefits of both methanol and water individually and in essence, together. It is in support of an 80/20 mix according to the its reasonings.

http://rusubaru.com/how-much-alcohol-methanol/

In order to run say a 75/25 mix, can anyone meanwhile advise me of the proper calculations according to the WEIGHTS of both water and methanol, as it is the proper way to measure as opposed to fluid VOLUME. thank you

? Why would you care about weights versus volume, since you're trying to get a 75% meth / 25% water mix ? Aren't you concerned with the concentration of meth in your mix ? If so, then VoCo + VaCa = VfCf will give you that.

plague · 08-15-2011, 05:01 PM

Quote:

Originally Posted by Slidewayz

? Why would you care about weights versus volume, since you're trying to get a 75% meth / 25% water mix ? Aren't you concerned with the concentration of meth in your mix ? If so, then VoCo + VaCa = VfCf will give you that.

i was informed by a buddy that it is calculated by weight. no matter what ratio, it is done my weight lets say, per gallon, not by actual ml or whatever measurement you choose use for example

plague · 08-15-2011, 05:14 PM

Quote:

Originally Posted by Slidewayz

? Why would you care about weights versus volume, since you're trying to get a 75% meth / 25% water mix ? Aren't you concerned with the concentration of meth in your mix ? If so, then VoCo + VaCa = VfCf will give you that.

think of it this way:
meth has a specific gravity of .792 & water 1.
This means that by WEIGHT, you create a 45/55 water meth mix when you make a 50/50 water/meth mix by VOLUME. 5% increase in meth content is probably a good safety margin any way, as it will help to ensure that you have at least the minimum octane you are tuned for without making the solution excessively corrosive.

So water 1kg/ltr
Methanol 0.79kg/ltr

So

5.2kg = 5.2 litres water
5.2kg = 6.6 litres methanol

= 50/50% mix.

335i101 · 08-15-2011, 06:26 PM

Quote:

Originally Posted by Syndicategt

Quote:

Originally Posted by plague

they must just take your word for it lol.

Yes they do, but for people like me with lots of integrity, it's hard to lie to them. I just show them my boost juice containter if they ask.

I run x2 1.0mm nozzels either 50/50 daily/track or 75/25 for drag.

Do u have cats in your DP's too

plague · 08-15-2011, 08:26 PM

Quote:

Originally Posted by Syndicategt

Yes they do, but for people like me with lots of integrity, it's hard to lie to them. I just show them my boost juice containter if they ask.

I run x2 1.0mm nozzels either 50/50 daily/track or 75/25 for drag.

integrity is not cheating on your wife. now lying about ur methanol content come aaaannnnnn ... jk bro but for real i wouldnt blink a moment as i lied about something like that. but at least we know u dont cheat on ur wife. ^ ^^good guy

dbjb · 08-16-2011, 12:13 PM

Interesting info. The only question I have is that it states 80/20 is ideal when using 50/50 gas to meth mix ratio. Does anyone know how much meth Procede uses at its most aggressive state? I can't imagine it being that high. Based on posts about meth use on a track, I'd guess the highest gas/meth mix ratio to be about 75/25.

drfrink24 · 08-16-2011, 02:04 PM

Quote:

Originally Posted by dsbj

Interesting info. The only question I have is that it states 80/20 is ideal when using 50/50 gas to meth mix ratio. Does anyone know how much meth Procede uses at its most aggressive state? I can't imagine it being that high. Based on posts about meth use on a track, I'd guess the highest gas/meth mix ratio to be about 75/25.

You're referring to this I think:

in alcohol injection systems with larger nozzles, it is easy to go overboard with too much water (more than 10-15% of total fuel), contaminate the oil and cause damage to the engine. When using 80/20 mix of alcohol/water, you can inject 50% gasoline and 50% 80/20 alcohol/water mix – and the amount of water will be a perfect 10% of the total fuel. Alcohol will add its own water to the mix upon combustion, but you will still be safe and under 15% water to total fuel ratio.

If 75/25 is the max gas + injection mixture, and you're using 50/50 mix, then it appears that you would actually be running 12.5% water (25/2), which would actually fall in their "contamination" range.

Joshboody · 08-16-2011, 02:14 PM

DME logs fuel consumption and you can calculate meth/water volume from your setup.

Joshboody · 08-16-2011, 02:21 PM

I think ultimately if tuned correctly 100% meth will give you the most power. Adding water slows burn, but also would change peak pressure. I think meth and water have similar evaporation cooling effects. The only power adder from water is increasing dynamic compression ratio, but you are loosing heat energy potential. Not sure if the article is very accurate.

08-15-2011, 03:23 PM	#1
plague Captain 40 Rep 957 Posts Drives: 335i sold :( / jb 20th AE Join Date: Mar 2011 Location: NJ iTrader: (2)	Meth/water ratio A little write up i came across discussing the benefits of both methanol and water individually and in essence, together. It is in support of an 80/20 mix according to the its reasonings. http://rusubaru.com/how-much-alcohol-methanol/ In order to run say a 75/25 mix, can anyone meanwhile advise me of the proper calculations according to the WEIGHTS of both water and methanol, as it is the proper way to measure as opposed to fluid VOLUME. thank you __________________ 07 335i- SOLD, and will be missed... Parts for sale- PWM meth kit, M steering wheel, M shift knob, perforated e brake handle
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08-15-2011, 03:26 PM	#2
soulja620 Cpl D 38 Rep 563 Posts Drives: 07 335i Join Date: May 2010 Location: Phoenix, AZ iTrader: (8)	very nice find.. thank you i needed this __________________ 07 AW e90 335 :jb4/dci/ic/meth= 12.2 @116 :jb4/dci/ic/meth/RaceGas/Slicks/gutted = Broken ET BOARD! 88- Mitsubishi Starion Turbo- Built~My feedback~ http://www.starquestclub.com/forum/i...0&fromsearch=1
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08-15-2011, 03:46 PM	#4
Jeff@TopGearSolutions 3441 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	Cliff notes: 80/20 10GPH nozzle on this car
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08-15-2011, 04:09 PM	#6
Syndicategt Brigadier General 155 Rep 3,730 Posts Drives: 335i Join Date: Sep 2009 Location: Nor Cal iTrader: (11)	Just FYI for you track guys. Certain groups like NASA & NCRC will only let you run a 50/50 mix. __________________ 2008 BMW 335i e90 - Sold - Rob Beck Turbos / PROcede V5 / Aquamist HFS-4 / AR Downpipes / AE Exhaust / ER Comp FMIC / ER CP / TiAL BOV / Custom Intake / RPI Scoops / Quaife LSD / Swift-Koni Coilovers / DSS HS / Morr VS8.2 Sig Black / Michelin PSS / P3 Boost Guage / M3 body / M3 steering wheel / Adam's Rotors / Hawk HPS / SS lines /
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08-16-2011, 12:13 PM	#15
dbjb I sweat pheromones 203 Rep 2,103 Posts Drives: e92 335i, retired SLK55 Join Date: Jul 2009 Location: NorCal iTrader: (25)	Interesting info. The only question I have is that it states 80/20 is ideal when using 50/50 gas to meth mix ratio. Does anyone know how much meth Procede uses at its most aggressive state? I can't imagine it being that high. Based on posts about meth use on a track, I'd guess the highest gas/meth mix ratio to be about 75/25.
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08-16-2011, 02:14 PM	#17
Joshboody Lieutenant Colonel 65 Rep 1,708 Posts Drives: pickemuptruck Join Date: Jul 2009 Location: Phoenix, AZ iTrader: (7)	DME logs fuel consumption and you can calculate meth/water volume from your setup.
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08-16-2011, 02:21 PM	#18
Joshboody Lieutenant Colonel 65 Rep 1,708 Posts Drives: pickemuptruck Join Date: Jul 2009 Location: Phoenix, AZ iTrader: (7)	I think ultimately if tuned correctly 100% meth will give you the most power. Adding water slows burn, but also would change peak pressure. I think meth and water have similar evaporation cooling effects. The only power adder from water is increasing dynamic compression ratio, but you are loosing heat energy potential. Not sure if the article is very accurate.
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