Whats needed to run e85?
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Joined: Feb 2006
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From: CT/NJ
You can mix up as many different types of fuel as you like. Lambda is still Lambda and you still have a best power rich and a best power lean.
It also doesn't matter what your wideband reads out in A:F units for. It is still telling you Lambda if it works.
TECH Fanatic
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From: CT/NJ
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Verdad Gallardo TECH Fanatic
Joined: Feb 2006
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From: CT/NJ
Get one of those 340 LPH "Aeromotive Walbros". I forgot the name or part number Aeromotive came up with for it, sorry. It will work great at that power level as long as you don't ask it to make too much pressure (AKA make sure injectors are big enough).
I've wondered about this^^^ too. Would you need a spare PCM with a tune to run normal gas to swap in? I know bi-fuel vehicles are on the road everywhere and "sense" what fuel is in, and the pcm compensates with different tunes. If one could swap pcm or tune to swap between fuel types, would you be able to keep the same injectors in and compensate for the flow through the tune, or would the injector size difference between the two be too great?
Staging Lane
Joined: Jan 2011
Posts: 53
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From: Hampton,Va
I must admit this seems like alot of money spent to get little HP is there a particular reason why you would go thru all this trouble to use a fuel that robs power and miliage? or is this a just because type build?
Gas wants 12% enrichment, E85 wants 20% depending on the motor combination of course. So what enrichment do you shoot for on each particular shot of nitrous?
I've wondered about this^^^ too. Would you need a spare PCM with a tune to run normal gas to swap in? I know bi-fuel vehicles are on the road everywhere and "sense" what fuel is in, and the pcm compensates with different tunes. If one could swap pcm or tune to swap between fuel types, would you be able to keep the same injectors in and compensate for the flow through the tune, or would the injector size difference between the two be too great?
You can run a "race" motor on the street with E85, instead of paying $12+ per gallon for race gas. I've NEVER heard of E85 robbing power, keep that bullshit to yourself instead of mis-informing people.
Staging Lane
Joined: Jan 2011
Posts: 53
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From: Hampton,Va
well thats why I had a ? at the end I wasnt miss informing people I was asking a question. So before you talk unessecary BS understand what Im saying. And yes It will rob power from these hybrid gas factory motors my dad has 1 and he says it clatters and bogs out everytime he uses it. And the loss of mileage pretty much makes up for the difference in price.
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From: CT/NJ
Somewhere between 12 and 20 percent, depending on how much of your total fuel is coming from E85 and how much is coming from C16. E85 is already a minimum 15 percent and up to 30 percent gasoline so this isn't really adding any overall complexity to the tune.
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From: CT/NJ
well thats why I had a ? at the end I wasnt miss informing people I was asking a question. So before you talk unessecary BS understand what Im saying. And yes It will rob power from these hybrid gas factory motors my dad has 1 and he says it clatters and bogs out everytime he uses it. And the loss of mileage pretty much makes up for the difference in price.
Tuning for E85 is very simple... And tuning for E85 with nitrous is simple also. Make your tune for the E85 non-nitrous. Then add the nitrous and proper fuel for your ratio you are running and watch the A/F on the dyno or on your wideband. 8.7/1 aka .88 lambda would be a great start. To properly size the fuel jet, its just a physics equation.
I gained over 20rwhp and 10rwtq switching. I have a 12.3:1 motor with e85 we could get more aggressive with the tune and gained some power. E85 can support an engine thats 13-13.5:1 so imagine gaining the 15-25 horse with compression on top of that. if the setup is based around it its actually probably the biggest bang for your buck vs $10 a gallon race fuel.
not only did I see a power gain, I dropped 15* engine temperature.
and as far as highway milage for example my OLD 355 engine would only get 18mpg on the highway with 93 octane pump fuel. Now with my 383 on e85 I get 16mpg, and worse ive seen is 14 on the highway (depending on the weather)
Only thing Ive ran into is that E85 tends to like a little bit more timing pulled with nitrous then 93 pump gas.
If I were to just have a heads and cam stock shortblock car I wouldnt be running it. But given what I have I wouldnt do it anyother way.