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Old Jun 14, 2007 | 08:09 AM
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methanol mixtures

ok, so after doing alot of reading and talking to a few people, i have come down to there are a few mixtures that guys are running, its between straight alky or straight methanol of course, but also to mix meth with distilled water, or the windshield fluid and heet (98-99% methanold).

what are the positives and negatives of these mixtures?
also compare prices of different mixtures.

Last edited by bvdawg13; Jun 14, 2007 at 08:31 AM.
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Old Jun 14, 2007 | 08:16 AM
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Originally Posted by bvdawg13
ok, so after doing alot of reading and talking to a few people, i have come down to there are a few mixtures that guys are running, its between straight alky or straight methanol of course, but also to mix meth with distilled water, or the windshield fluid and heet (98-99% methanold)

what are the positives and negatives of these mixtures?
100% all the time is too corossive..........I use 50=50 Water and Meth.
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Old Jun 14, 2007 | 09:38 AM
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200 proof methanol is only corrosive to reactive metals like Zn, Al...

http://en.wikipedia.org/wiki/Methanol
One of the drawbacks of methanol as a fuel is its corrosivity to some metals, including aluminium. Methanol, although a weak acid, attacks the oxide coating that normally protects the aluminium from corrosion:

6 CH3OH + Al2O3 → 2 Al(OCH3)3 + 3 H2O
The resulting methoxide salts are soluble in methanol, resulting in clean aluminum surface, which is readily oxidised by some dissolved oxygen. Also the methanol can act as an oxidizer:

6 CH3OH + 2 Al → 2 Al(OCH3)3 + 3 H2
This reciprocal process effectively fuels corrosion until either the metal is eaten away or the concentration of CH3OH is negligible.

wetted parts in a WI system include nylon, santoprene, EPDM, nickel coated brass, Buna-N, Nitrile, austenitic stainless, polyethylene, polypropylene, delrin - all fairly stable in the presence of methanol
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Old Jun 14, 2007 | 09:52 AM
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Originally Posted by bvdawg13
ok, so after doing alot of reading and talking to a few people, i have come down to there are a few mixtures that guys are running, its between straight alky or straight methanol of course, but also to mix meth with distilled water, or the windshield fluid and heet (98-99% methanold).

what are the positives and negatives of these mixtures?
also compare prices of different mixtures.
lots of good information on this subject from Richard and Jack

on injection mixtures:
http://www.srtforums.com/forums/showthread.php?t=308693

good stuff:
https://www.evolutionm.net/forums/sh...29&postcount=7

Methanol cost about $25 to 30 for a sealed metal drum of +99% purity, tech grade
RO/Distilled water, ~$0.60 from the grocery stall
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Old Jun 14, 2007 | 10:31 AM
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100% methanol, been runing 500+awhp on a DIY kit I made, ZERO traces of anything wearing or washing away.
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Old Jun 14, 2007 | 11:08 AM
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so what are the performance differences besides the cool down factor between 100% meth and 50/50 mix?
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Old Jun 14, 2007 | 12:12 PM
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Additional octane, but to really take advantage of a high methanol injection mix you need to tune for it......which means that you need to get your failsafes mechanisms figured out, and make sure they work properly.
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Old Jun 14, 2007 | 07:54 PM
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100% methanol.

P.S. don't **** with Slowcar. He will beat you with technical chemisty textbooks.
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Old Jun 14, 2007 | 08:07 PM
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Old Jun 15, 2007 | 06:39 AM
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Originally Posted by TTP Engineering
100% methanol.

P.S. don't **** with Slowcar. He will beat you with technical chemisty textbooks.
what is the advantage of using 100% methanol vs a 50/50 mix?
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Old Jun 15, 2007 | 07:50 AM
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Higher octane, cooler intake charge, more ignition timing, less knock.
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Old Jun 20, 2007 | 11:42 AM
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so i cant find any straight methanol around me to mix....i was thinking of heet and washer fluid but i heard that heet is bad?
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Old Jun 20, 2007 | 12:59 PM
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If meth is corrosive to Al, do we have to worry about it corroding our head?
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Old Jun 20, 2007 | 02:18 PM
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Originally Posted by TTP Engineering
Higher octane, cooler intake charge, more ignition timing, less knock.

On 50/50 mixes- what is the purpose of the water? Only for cooling purposes, or to dilute the methanol a little to make it less corrosive?
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Old Jun 20, 2007 | 03:03 PM
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Originally Posted by bvdawg13
so i cant find any straight methanol around me to mix....i was thinking of heet and washer fluid but i heard that heet is bad?
Yellow heet is 99.9% methanol and available at wal-mart.
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