Ya we talked about the MPG difference between the fuels(some quotes below)...BTW that is interesting that a mixture of 25% alky would actualy increase MPG...very interesting indeedTwisted6 said:One thing I don't recall reading in this topic. Is that You will be running MORE E85. When going from gas to a Alky Motor ,The carb jetting needs to be Bigger then they would be for Normal Fuel. This is what i have been told many times By different racers. I also Found this out myself. On my Daughters Jrs dragster When we switch from reg, Race fuel to Elky. Yeah I paid less per.Gal. But I used twice as much.The Jr Ran 8.90s in the 1/8.
One other thing I have done in the past was to mix the Elky with 87 fuel In my 88 chevy Van If i stayed with 3/4s of a tank of the cheap stuff and a 1/4 elky I got a little better mpgs. But i tired a 50/50 I got less mpgs then if i just ran straight 87. Mind you I did this with OUT making any changes in timing,plugs. This also was not E85, But it was the same elky I ran in the Jr. Not that there is much difference I don't think??
This E85 was also a topic on the Inliners And from what I also understood and from what testing I did with elky and gas ,The E85 will have less Mpgs then the reg fuel we already now use.?????
So just my 2cents worth.
GrandmaGold said:As afar as my knowledge goes, you need to run a alcohol type carb (being that Ethenol is just like Alcohol, you need to have 1/3 more fuel than regular gasoline) and fuel pump. I think Aeroquip teflon fuel lines (insted of the rubber type) should be sufficent.
69NovaSS said:Would a person be able to just rebuild a gas carb with the correct parts/gaskets to withstand the corrosiveness of the alcohol and then increase the size of the jets by roughly 30 percent?
==sYc==> said:Remember, your fuel economy will drop on E85. For example, if you got 30-mpg on gasoline, you will only get about 20-mpg on E85. Make sure you factor that in when you price the stuff. Basically the price of E85 has to be about 2/3rd of the price of gasoline before you start saving money. So unless you can get $2-gal E85, you'll be spending more on fuel.
69NovaSS said:Well first I would not think of running e85 if my car could run on 87 octane fuel. BUT it will not run on that fuel it will likely need substantially more octane than that so that is when it starts to become economicly feasiable to do this.
From a few sources I have heard the current price of E85 is slighlty less then the price of 87 octane. So I can have 105 octane fuel for slightly less then the cost of 87 octane. If it turns out due to my 11.5+cr (will know the exact cr in the future) using iron heads to boot that I need to run 100 octane to avoid knock then e85 is a huge bargin. You cannot buy 100+ octain fuel for less money then you can get e85. And I would speculate that most 100+ octane fuel is indeed at least a 1/3 more expensive than e85 (though i have not looked into that yet)
Yes I will lose mileage..thats a given.... On this car however thats no biggy. So instead of getting 9mpg...like it did in the past it will not get 6mpg. Again no biggy. The car will get crappy MPG no mater what I run for fuel it always did in the past and it always will as long as I own it...
69NovaSS said:ummm...no...his assumption is based on, or at least I assume it is, my replacing 87 octane fuel with e85...well that is NOT the plan....my plan is to replace 100+ octane gas with 105 octane e85. when you look at it that way there is indeed a cost savings to be had. E85 is currently slightly less then 87 octane fuel...100+ octane gas is substantually more then that in cost..
I dunno maybe I'm out to lunch on this
bigkaboose said:There is an article in the Popular Hot Rodding magazine for July. The article states that E85 can be as much as 113 octane. With this we can run 13.1 compression and it will cost cheaper than regular. The article does state if you got 10 mpg you will now get 9 but again the savings of paying $$ for super and getting gas thats higher octane that is cheaper than regular out weighs it. Plus who cares its cleaner
Jeff, I do think your right on this...I was looking through the Bill Mitchell Hard Core Catalogue and saw that they do sell recalibrated Metering blocks for holley carbs specificly for Alcohol. For a 750 carb it looks like they are about 50 bucks give or take a bit per metering block. Now I suspect this is calibrated for the more common Methanol based fuels used in race cars so I dont know how this would translate out to Ethanol which is what E85 is largely comprised of.Hi,
What ever the exact calculation is Im not sure a simple jet change would make me happy with a carb. I would think the bleeds- emulsification- power valve restrictions-idle-etc-etc- would also have to be modified. I would not mind doing this, I just have to learn what I need to do.