I was just wandering has anybody tried mixing some E85 with 93 octane to achieve a higher octane number?With all the gas stations around me starting to sell E85,Im real tempted to try it out.Im in the process of building a 572BB with 12:1 compression and willing to try this concoction out.Can it be harmful mixing it without changing carb,fuel lines and whatever else needs changes?Im currently running 11.6:1 in my 461BB with iron heads and full performance ignition curve without any signs of detonation on 93 sunoco.If anybody out there has tried mixing these ingredients and has good luck with it,please chime in.Forget about the kemco and all that other additive crap,it would be interesting to see if this E85 mixed with 93 pump gas is achievable without problems.
461RAT
I would think it would slow you down, cars set up to run on gas will not right run on alkiehaul,ethanol,methanol.
I am new to this message board but I have a 468 that runs on e85. The local speed shop (Grawmondbecks in Mason City, Iowa) builds e85 engines and have won awards for doing so. I was very apprehensive on what I would have to change to run this but the fuel system is about the same as any other I have ran. The only difference is that the carb (850 demon) has 98 jets in the front and 110's in the back. The engine was on the dyno and made 540 hp. The only problem I have come across with this is that in cold weather it is very hard to start. I live in Iowa and drag race so in the winter months it doesn't get driven anyway. It is a cheap alternative to race fuel and if it is available at the pump for 1.50, why not? It does burn a lot more than normal, about 30 percent. I have raced it for a few years and haven't had any problems. I am no expert but here in Iowa it is something home grown to run. I am currently racing an old chevy stepside truck and just a few weeks ago I purchased a 67 supersport chevelle. Don't know if this helps or not.
excellent respones,thanx again,keep em coming.Thats basically what I was getting at.Mix about 75% 93 pump with 25% E85.What effects it would have,if any.It just seems so tempting to try.Theres 2 gas stations about 3 miles from my house selling this stuff for $1.80.At 105 octane and running higher compression with my next build,Im curious.My current setup with my 461 and 11.6 to 1 is fine on plain old pump 93.Thats because of the forgiving cam that Im running.the winter build Im working on now will be exact 12:1.Im gonna pour some of that in the tank and see what happens
All my experience is coming from fuel injection land, so I don't have a great handle on how this all plays with a carb'd engine but...
E10 (10% ethanol) is used "all over the place" these days for various reasons. BUT 93 octane E10 fuel will pretty much have the same octane as 93 octane E0 fuel (The ethanol replaces some of the "other" octane boosting additives). For the same amount of fuel (i.e. same jetting setup, etc.) E10 will run about 3-4% leaner than E0. Since most folks have their older cars setup a bit rich, this tends to burn a little cleaner, make the world a better place, yadda yadda yadda. I imagine a carb'd engine would run a little crappier in cool weather with E10 unless you re-jet for it, but most folks probably won't notice the difference. For fuel injected cars, they'll just adapt to the E10 fuel and everything will run the same (or at least, it should).
Various states have proposed going to E20 (20% ethanol) in the future (2012?) This gets everyone who likes renewable energy all excited, but it means all vehicles will run ~6-9% leaner. For a well-tuned carb'd engine, you're going to start noticing this (ironically, the folks with the super-rich jetting won't have any drive issues -- you penalize the folks with the well-tuned cars). Fuel injection can still adapt this out, but it starts getting really hairy when it comes to meeting emissions and diagnostics.
FFV (flex-fuel vehicles) are set up to run anything from E0 (0% ethanol) to E85 (85% ethanol). "almost" every manufacturer that does this uses a sensor in the fuel tank to detect the ethanol percentage and automatically re-tune the engine for whatever you've filled up with. On a carb'd engine, you don't really have that option....
Anyhew, as long as you're going to be pretty consistent with what fuel mix you're running, the added E85 will boost your octane and make the engine happier
. If you keep messing around with the fuel mix though, you're gonna have a heck of a time getting the jetting right since you'll have a moving target. I'd probably just set it up to run straight E85 and keep a distributor wrench around "just in case" you need to back the timing off and run some 93 pump.
E10 (10% ethanol) is used "all over the place" these days for various reasons. BUT 93 octane E10 fuel will pretty much have the same octane as 93 octane E0 fuel (The ethanol replaces some of the "other" octane boosting additives). For the same amount of fuel (i.e. same jetting setup, etc.) E10 will run about 3-4% leaner than E0. Since most folks have their older cars setup a bit rich, this tends to burn a little cleaner, make the world a better place, yadda yadda yadda. I imagine a carb'd engine would run a little crappier in cool weather with E10 unless you re-jet for it, but most folks probably won't notice the difference. For fuel injected cars, they'll just adapt to the E10 fuel and everything will run the same (or at least, it should).
Various states have proposed going to E20 (20% ethanol) in the future (2012?) This gets everyone who likes renewable energy all excited, but it means all vehicles will run ~6-9% leaner. For a well-tuned carb'd engine, you're going to start noticing this (ironically, the folks with the super-rich jetting won't have any drive issues -- you penalize the folks with the well-tuned cars). Fuel injection can still adapt this out, but it starts getting really hairy when it comes to meeting emissions and diagnostics.
FFV (flex-fuel vehicles) are set up to run anything from E0 (0% ethanol) to E85 (85% ethanol). "almost" every manufacturer that does this uses a sensor in the fuel tank to detect the ethanol percentage and automatically re-tune the engine for whatever you've filled up with. On a carb'd engine, you don't really have that option....
Anyhew, as long as you're going to be pretty consistent with what fuel mix you're running, the added E85 will boost your octane and make the engine happier
. If you keep messing around with the fuel mix though, you're gonna have a heck of a time getting the jetting right since you'll have a moving target. I'd probably just set it up to run straight E85 and keep a distributor wrench around "just in case" you need to back the timing off and run some 93 pump.-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
