gregrob Posted February 15, 2008 Report Posted February 15, 2008 I know a lot of fairly heavily modded bikes run on meth. What's to keep a bolt-on, ported banshee from benefitting from alky? I know I'd have to buy bigger, alky carbs, but other than that what are all the downsides? It costs less than race gas, burns cleaner, cooler, and makes more power right? Thanks, Greg Quote
rubberneck Posted February 15, 2008 Report Posted February 15, 2008 About the only thing I can think negative is the fact that your economy is about 1/2, so you dont go very far on a tank of fuel. You have to purge at the end of each day or the meth will absorb moisture fromt the atmosphere and create havoc in the carbs. Other than that I think you nailed down the positive. Quote
inthemail Posted February 15, 2008 Report Posted February 15, 2008 where the hell is bigred when you need em?? im interested in learning a bit more into this as well considering methanol is easy to buy here in canada. truckstops carry it for truckers lookin to thaw out frozen diesel. whats the minimum you need as far as mods go for running methanol? is the mixture the same as regular gas? special mix oil? whats the deal here man? im down for running it for sure even with the purging and such. Quote
trex banshee Posted February 15, 2008 Report Posted February 15, 2008 all the things i done when i switched to alcohol a couple years ago consists of converting the carbs(obviously), dual pingle, taking all the guts out of my gas cap and drilling the hole as big as possible, advanced the timing more, differrent compression, different plugs, different plug gap, and LOTS of alky :biggrin: then the hole purgin thing.... oh and yeah i run the same mixture as i did on gas 32:1 but i had to switch to klotz supertechniplate...i used to run 100% synthetic HP2 but it doesn't mix with alky...found that out the hard way :: Quote
theshee Posted February 15, 2008 Report Posted February 15, 2008 I know a lot of fairly heavily modded bikes run on meth. What's to keep a bolt-on, ported banshee from benefitting from alky? I know I'd have to buy bigger, alky carbs, but other than that what are all the downsides? It costs less than race gas, burns cleaner, cooler, and makes more power right? Thanks, Greg If you are going to dune, dont go to alky. Get horrible mileage, I mean real bad- 3 passes on my 10mil and I was out. You have to purge after you get done riding for the day which is a pain in the ass, Trust me, its not worth it on a dune bike. Quote
NYUK Posted February 15, 2008 Report Posted February 15, 2008 dave moore said a long time ago. factor in a new top end when tuning alky for the 1 st time. it is touchy to temp and humidity. it is really not practical if you are not a straight line drag racer.1 st time i ran alky i blew a hole the size of a quarter through a piston. couldn`t purge the bike. the next day when i pulled it apart. there was slight rust on the crank and sleeves.it is highly corrosive. Quote
dajogejr Posted February 15, 2008 Report Posted February 15, 2008 Yep....not worth it on a duner... I went through one piston this year by getting greedy and learning the curve. If you're lucky you only smoke a top end. Quite a few smoke a bore, waste a crank or rod bearing....all depends on your luck! Quote
badassbanshee479 Posted February 15, 2008 Report Posted February 15, 2008 Yep....not worth it on a duner... I went through one piston this year by getting greedy and learning the curve. If you're lucky you only smoke a top end. Quite a few smoke a bore, waste a crank or rod bearing....all depends on your luck! or a piston, set of cases and a replate!! oops! but damn does it run hard when tuned right! Quote
inthemail Posted February 15, 2008 Report Posted February 15, 2008 werd keep it comin guys haha this topic is getting scary! do the ones who smoke entire internals usually just do so by being too greedy breaking in? or is it just all in the setup trying to get it jetted. i personally believe any 2 stroke can last forever if broke in right. does this go for meth? or is it just trial with most likely error. i know plug chopping is essential to proper jetting but how close to you have to guess your baseline before trying without a blowup? Quote
badassbanshee479 Posted February 15, 2008 Report Posted February 15, 2008 mine blew up when the temp out side changed on me and I didn't compensate enough for it! broke a piston skirt which was sent flyin threw the case half and trashed my plating on the cylinder. when you jet an alky bike it is completely different from a gas bike! there are a couple really good threads on planetsand on how to read an alky plug. word to the wise, start out pig fat and lean your way down slowly! alky will still run really well even if there is raw fuel sprayin out of the pipes! likes compression in the 170-180 range, and it likes a bunch of timing! will make more power if you get a set of domes cut that are designed for alky also! Quote
00tbanshee Posted February 16, 2008 Report Posted February 16, 2008 you can run your compression close to 200 with the alky and there is some that are close to 220 but wouldn't recommend that.like was said run the dual pingle,take the guts out of your gas cap and drill larger hole.also if you want to spend the money for larger carb bowls is good too.my motor last yr i switched to alky from c12 and never changed the head and picked up .3 in 500ft drag.also it seemed to me that the cooler it got to be outside i had to lean the power jet out.does that seem to be the case with everybody else?once you run it you will be hooked Quote
BigRed350x Posted February 16, 2008 Report Posted February 16, 2008 Your mileage WILL suck major wang. So unless you find a nifty way to haul more fuel with you (like in my sig) then ditch the idea right now. Like everyone said, plan on going through a top end. I burned up a top end the first time I rode on methanol. Leaned out and welded some rings and some other fun stuff. Bigger bowls are a must for a duner on methanol. Pingel is also a must. Its fun, but for most everyone gas or race gas is better. The benefits very rarely out-weigh the costs of running it on a duner. I have specific reasons I run it on my duner, one of which is ease of getting methanol out on the dunes I ride. Quote
csrmel Posted February 16, 2008 Report Posted February 16, 2008 you can convert to it simply by changing the jets and a bit more fuel work as was already stated by everyone else. but in order to take real advantage of it, you need significantly advanced timing, different compression domes, and not just higher compression. proper alchy domes have a different squish band than gas domes. this isnt something you can buy off the shelf. those domes probably need to be custom made because they are not a high volume product. maybe some people carry them, but i wouldnt know. Quote
gregrob Posted February 16, 2008 Author Report Posted February 16, 2008 Thanks guys! Lots of good info around here. No methanol for me on this bike! I guess if I build a more hardcore duning machine hill shooter / dragger I would consider it but I want to be able to ride in the woods, on the track, just playin etc. Doesn't sound like it's worth it for me. I'll stick to gasolina for now! Greg Quote
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