wh carbs on alcohol

[dash]

Does anyone have any tips on converting wh15,20,22,31 carbs for methanol?
other than jetting and keeping enough fuel supply up them is there any other mods needed? What would be a good starting point for jetting?
any help would be welcome.
dash

[bigshrimpin]

I am interested in the same question. Can you run two stroke motors on straight alcohol? How well does alcohol mix with oil? Can you pre-mix with oil or something that will lubricate the motor? I would think those early ficht bombs would be great motors for this type of fuel.

[dash]

There are oils available for use with methanol
I use castrol M it is a castor based oil for mixing with methanol.
I believe redline have an oil too.

[Freddie Webb]

What ever mains you are running on gasoline multiply that times 1.6 and that should get you in the ballpark. For example if you are running .080 on your mains on gas you should run .128 on methanol. You can only use 2 stroke oil that is compatiable with methanol and it will tell you on the container.

[SportJ-US-1]

The guys running the alky classes in the Pro outboard classes of APBA, pretty much just leave the main jets out of the carbs. The reason is that even if it is to rich, alky runs so cool it doesn't hurt anything. Alky is a very forgiving fuel, except for too lean and even then it doesn't melt pistons like gas will.

[Jay Smith]

The problems running Meth. or Alky in a 2 cycle are ENDLESS , a needle bearing 2 stroke motor will NOT live running these fuels on a daily basis as they bring in too much water and after EVERYDAY of running it the motor MUST be purged with a rich mixture of gasoline and 2 cycle oil to prevent the needles bearings from rusting to the crankshaft! Also Kinsler , the fuel injector gurus tell me these fuels render only a 6% gain in HP on a normally asperated engine, doped racing motor gasoline make more power! Been there and done it ! Also the carb jets cannot be even drilled out to get enough fuel ! As the fuel system curket only is .115" without a jet at all. Also you will have to run a castor bean oil product as it is the only oil that will not wash off the bores and gauld with the great amout of fuel and its solvent effect. Running this oil will in a rich mixture will also gum the ring lans and cause premature ring sticking and engine failure.......Fuel pumps will need to be of a Viton "O" ring style ( BIG $$ ) and a cheap vein pump ( Holley ) will chauk up and gauld as the fuel is very dry. Simply not worth the effort and or the problems associated with running these products !

From my experiances !

[Freddie Webb]

I am not trying to step on toes but if you are drag racing and want an extra 2-3 tenths it was worth it to me. I do not recomend it for the weekend warrior, I can't speak for merc carbs because my personal use was and is with omc carbs. The needle and seats have to be changed to an alcohol resistant type which is viton made by rodchester. The idle passages have to be drilled all fuel lines, filters and pumps must be alcohol resistant. The motor must be flushed after every use with gasoline because alcohol draws moisture and will cause bearings to rust and eventually failure. I had no trouble with alcohol, but I flushed after every use with one gallon of gas with my normal 50:1 two stroke mixture and I ran two summers with no problems. I am no expert nor claim to know it all just stating what my experiance with alcohol was. I like it and know people that were and are successful with it in mercs but everyone has different ideas and techniques. That is why we race for the personal knowledge of my or your technique is better. That is just my opinion and it is just that an opinion. Hope this helps, if not sorry for the wasted space.

[steve]

I prefer castor bean oil with alky, but I know Mumford runs Redline. He's usually up on things as he put us on to Alisyn over 8 years ago. He runs an SVS and case injected oversized injectors. Its supposed to only be around 6% increase like Jay says, but most everyone running methanol swears it runs better than that. I think ODBA still makes you add weight for it , don't they? Its quite hard on fuel cell foam, takes a very good fuel system ( high amperage high output pump etc) and requires that wash down with gasoline for sure. It also requires a larger fuel tank because you go thru it faster. Guys have said that the OMC and Yamacarbs work better with it. Never tried it with carbs but you might check around a bit more. Bruce Tripp would be someone to check with on carbs. Also HydroTech on the size of the Yamaha style. I always wanted to run a very trick snowmobile carb setup from PSI. Never got to yet. Have fun! :)

[dash]

Thanks for all the info guys.
I have run methanol before on a 3cyl with 2bbl omc carbs.
I am now racing a 2L v6 merc and was unsure about merc carb mods.
it seems like it may be easyer to adapt my omc carbs to my merc for methanol