What Is The Advantage Of Alochol And Best Carb.

[g-lo]

i am going to add a +4 stroke to my shee and get some new carbs. i was wanting to know if switching to alochol gives that much more HP. i do mostly trail riding, but do some drag racing and am thinking about doign the harescrambles next yr. what size carb should i get i am thinking about 33 but not sure and what brand would be the best.

does alochol require anything other mods, like higher compression or anything? do you have to rebuild more often with alochol? thanks for your help.

[Travis's Banshee]

I run alcohol in my banshee now. You'll need to go w/at least a set of 39-40mm carbs. Usually best to figure about a 1/3 larger than gas.

Your fuel consumtion will also be greater. I have two sets of carbs for my shee and switch back and forth. No real mods needed for the alky carbs. I know guys that use the same intake boots, but you'll have to really stretch them to get the carbs on. I don't recommend this.

The performance gains in my opinion are worth it. For the sand and draggin' it can't be beat. For trail riding I run the gas carbs. Were usually out quite a while and running alcohol I need to carry extra fuel or go back to refill.

After running the alcohol you will need to purge it from the engine if it is going to sit for any length of time. The alcohol is hard on seals and o-rings. I have a small purge tank I fill w/my regular pre-mix and run it through.

Warm up time is considerably longer w/alcohol. On cool damp mornings you may get a light frost on you intake tract. Just make sure the shee is good and warmed up before you take off and you'll be fine.

 

Sorry this was so long. Just my .02$

[ScreaminShee01]

39-40 mm carbs?! hmm seems a little high for me maybe for a big bore banshee... i know theres gotta be guys on here on alchohol running 33's and 35's

[Travis's Banshee]

2nd banshee I've run on alcohol. Both set of carbs came set-up from FTZ. Both are modded about the same. ported, pipes, heads and cranks trued and welded.

 

You can run smaller carbs, but you need to jet way up. Then air flow is a problem. You gotta get the air to burn all the extra fuel.