|07-30-2009, 12:57 AM||#1|
Join Date: Jan 2004
Location: Perth, Australia
Water Methanol 50/50 mix by weight
I have a 12ltr Spec C tank id like to fill, in a 50% ratio.
Am I right assuming the following weight for Methanol @ 20 deg C ?
So water 1kg/ltr
5.2kg = 5.2 litres water
5.2kg = 6.6 litres methanol
= 50/50% mix.
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Last edited by waxdass; 07-30-2009 at 04:17 AM.
|07-30-2009, 11:43 AM||#2|
Join Date: Sep 2003
Location: Bullet-Dodging Fwy Los AngelesVehicle:
0405 WRX STi/S2000
Sounds about right
Except H20 has a density of 0.9982 g/cm^3 @ 20C, therefore it's 0.9982 kg/L (@ 0C it's 1kg/L)
Many make the mistake of making the mix based on volume.
Last edited by engineerx; 07-30-2009 at 12:01 PM.
|08-14-2009, 03:56 PM||#4|
Join Date: Aug 2009
2004 wrx sti
I guess the real question is:
did your tuner tune for a mix that is 50/50 by weight, or 50/50 by volume?
to me, this isn't really a big deal any way...
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.
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