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Old 09-13-2012, 12:12 PM   #1
550SENTA OP
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water-methanol injection

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Old 09-13-2012, 12:36 PM   #2
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the sistem is described in this link

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Old 09-14-2012, 03:23 AM   #3
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That is not necessary on a 2stroke. You are either running lean (more air than fuel) or you have a old 2stroke with a bad combustion chamber design.

detonation or pinging does not cause that amount of excessive heat, but running to lean does cause detonation and extreme heat. Enough heat to melt aluminium.

here is a good read on the subject http://www.thumpertalk.com/topic/456014-2-stroke-terms/
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Old 09-14-2012, 04:18 AM   #4
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Also no 2 of the second post on that link I posted above^^ is not correct when concerning a 2stroke. That ignition advance explanation used apply's to 4T.

A 2T ignition curve looks like this

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Old 09-14-2012, 08:07 AM   #5
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Just come to America and buy pump gas let it sit in a plasitc gas can for a while you will have H2O and ethenol free
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Old 09-14-2012, 10:56 AM   #6
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Talking

Quote:
Originally Posted by Reino View Post
That is not necessary on a 2stroke. You are either running lean (more air than fuel) or you have a old 2stroke with a bad combustion chamber design.

detonation or pinging does not cause that amount of excessive heat, but running to lean does cause detonation and extreme heat. Enough heat to melt aluminium.

here is a good read on the subject http://www.thumpertalk.com/topic/456014-2-stroke-terms/
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Old 09-14-2012, 10:56 AM   #7
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Just come to America and buy pump gas let it sit in a plasitc gas can for a while you will have H2O and ethenol free
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Old 09-14-2012, 02:45 PM   #8
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You are going to have to find a different pump, because those windscreen washers cannot hold pressure. You need to find a pump with a high enough pressure capability to atomize the mix.

But for now you can use the system you mentioned and later if you want to improve it you can do so. Also if you don't have methanol you can use just water.

Battery power wont be to much of a problem those small battery packs used in those fast rc cars would probably last two days.

The most difficult part would be to make a automatic switch of sorts.

What bike is it?
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Old 09-15-2012, 11:05 PM   #9
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ww2 messerschmitt with water methanol injection

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Old 09-16-2012, 07:07 AM   #10
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Seems like your water injection project is a solution in search of a problem. I'd start off with the basics, fix the jetting and timing to get rid of the detonation. Then maybe look at a new/modified radiator setup to remove more heat from the head.
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Old 09-16-2012, 08:58 AM   #11
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Seems like your water injection project is a solution in search of a problem. I'd start off with the basics, fix the jetting and timing to get rid of the detonation. Then maybe look at a new/modified radiator setup to remove more heat from the head.
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Old 09-16-2012, 09:24 AM   #12
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If you have a very highly tuned race motor, which detonates due to very high compression, then if you can get methanol no problem, then why dont you run the bike on 50/50 methanol/petrol mix? This will mean no more detonation, and should provide a bit more power at the same time.
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Old 09-16-2012, 09:39 AM   #13
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If you have a very highly tuned race motor, which detonates due to very high compression, then if you can get methanol no problem, then why dont you run the bike on 50/50 methanol/petrol mix? This will mean no more detonation, and should provide a bit more power at the same time.
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Old 09-16-2012, 01:09 PM   #14
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Holy Smokes. I stand corrected!


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i allready modyfied the radiators,i mounted 2 electric fans taken from a computers shop,i installed battery 4 them to work on the moto,another improovement i did was to install a electric water pump.the old water pump i had didnt supported high tures and breaked all the time(i had like 4 gears smashed in the engine-water pump gears).i tryed water methanol and also pure methanol today with my improvisation of instalation.the instalation i made its not good,its sprays too much compound,like 200 mililiters in 10 seconds ,but was fun to try it.i observed a improovement using methanol at idle.but at a point the engine stopped and i dismounted the carb to clean it,was full of water and methanol.oh,btw,today i felt verry sick because i sprayyed methanol with this instalation ,and i think i inhaled a bit.can be lethal,so dont play with methanol,anyway ,its illegal in most countryes.i think a good sistem can be done with water methanol but these compounds must be bottled in a high pressure recipe and with a verry fine nozzle (like spray cans have) that would increase the flow when engine gets high tures.
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Old 09-16-2012, 11:07 PM   #15
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that would be the next thing to try,but methanol its expensive and illegal,i also expect to consume more fuel with 50/50 mix and probably somme carb problems...another thing in 50 50 mix is that i dont trust in methanol abilityes to lube the cillinder.rc planes that work on methanol use only ricin oil and a bit of nitromethane but they last just 2 hours
I would suggest that if you cant get the fuel required to run your race motor successfully, that it might be a good idea to sell it and replace with something less highly tuned, which will run on pump fuel?

Not sure on methanol being illegal for race use though.............nitro methane is much nastier and is used in race applications all round the world!
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