Grocery Getter
A guy with a truck.
Dumb suggestion of the day
You could also just put 1/2 tank of E85 in an empty tank ......jzus I'm losing it today.
Black Bear Tune
- Thread starter MeanGreen03
- Start date
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Dumb suggestion of the day
You could also just put 1/2 tank of E85 in an empty tank ......jzus I'm losing it today.
blueflamed03
Elite Member
true, but I knew what you meant 
tybardy
everyone needs a Hoe
i am thinking that putting e85 into your tank with a 93 tune wont do much for you compared to having your motor tuned to take e85.
Rational..
If e85 is actually 105 octane, then justin would lean out the tune even more to accept the e85 gas, which would in turn give you the proper fuel/air mixture. then you would see the power gains you want...
i could be wrong on this point... but im pretty sure its going to work like that.
Rational..
If e85 is actually 105 octane, then justin would lean out the tune even more to accept the e85 gas, which would in turn give you the proper fuel/air mixture. then you would see the power gains you want...
i could be wrong on this point... but im pretty sure its going to work like that.
Grocery Getter
A guy with a truck.
I am sure he could tune for E85 and it would be wicked but you'd be kinda screwed here in the West. He could definitely get much more out of the fuel with a tune for it but then you would HAVE to run it and it is just not that readily available, especially here in AZ. I definitely can tell a difference, like how my truck runs, and have a station five minutes away so I go with it but I wouldn't tune for it since the station is not open on weekends and if you leave the city and go up to Flagstaff for the day your screwed and will ping all the way home when you have to fill up with 91. It's really not that big of a deal to run, try it and if you like it and it's convenient enough for you to get it certainly won't hurt.
My thinking is I have a 93 tune and so I am definitely not getting the most out of it with 91 so the E85@105 is getting the most out of my tune for sure. Could it be optimized for E85 and run even better on it, for sure but that is not practical.
Grocery Getter, I read your posts about the E85 and stopped at one of the two stations that carry it in my town. One being a few blocks away, my tank was just about empty. Filled it with $1.90 a gallon E85. A few miles down the road I could tell a huge difference, it's like a whole new truck. And this is with the 22's I just put on. Not sure why I never tried it before, but thank you for posting all the info!
For anyone that has a flex fuel truck, try it out!
For anyone that has a flex fuel truck, try it out!
Grocery Getter
A guy with a truck.
Awesome! I'm glad I'm not crazy
Now your hooked on the corn and $1.90 holy crap! I pay $2.28 here in Phx ip from $2.02 a few months ago. It's good
stuff spread the word....
Eagle
Thansk for all the help -STAFF!
Ugggh. I wish I could even GET e85 to try it out.
tybardy
everyone needs a Hoe
still to scared to try it.... heard it was ******* the motor but i cannot find any information about that one way or the other. If i go and fill up with this stuff and it turns out to give me more power.... i will be hooked!!
Grocery Getter
A guy with a truck.
It will undoubtably give you more power. I still don't know what you heard about it being ******* the motor but it's not as far as I have been able to find out. Tens of thousands of vehicles run on it and fleets of government cars/trucks as well, the government Alt Fuel station is just down the block from my E85 station. The fact the same guy that wants to adjust his timing, run a supercharger , and has all systems maxed out by BB is worried about E85 being ******* the engine is what I find funny....... it won't hurt your rig TY and even if it is a little more work as far as combusting the fuel(just a wild guess at how it could be harder on the engine) it's not any harder than all the mods you would do to your engine if you had the means......
disclaimer: I could be totally wrong
blueflamed03
Elite Member
but are those Flex Fuel vehicles?
Eagle
Thansk for all the help -STAFF!
The deal with e85 is this.
it is
a: corrosive to seals and some metals
b: has les energy per gallon,
c: and stoich is a differnt ratio, so you need either longer pulses or larger injectors to achieve the same combustion ratio
D: the higher cotane means it burns more slowly and coolly, so you can run leaner OVERALL mix or more timing with e85 or higher compression (or all the above) than you cna with gas.
e: IIRc ethanol actually ignites about as easily as petrol and atomizes about as easily so you don't need some monster spark system
What would be a piston melting tune on 93 octane gasoline, and a ragged edge tune on 100 octane unleaded, is very safe on e85. Thus unless you have a flex fuel vehicle, if you tune for e85 and then have to fill up with gas, you are going to run like poo... Way way fat, and probably knock from excessive timing too.
IIRC e85 was about the 42% less energy, stioch was around 9.7:1
You would think you needed to throw 42% more fuel to make up for it, but you don't. What folks did was run ~25% more injector so you get a leaner final mix under open loop, and let the ecu find stoich with it's adaptation. Then bump the timing up 3-5 degrees.
At least that is how you do it on OBDI vehicles that my friends have converted in other places to run on it.
Problem is again that when you are NOT using e85 *** it isn't flex fuel, the timing and fueling are way off, and you get poor power and economy. you need to reflash it back.
it is
a: corrosive to seals and some metals
b: has les energy per gallon,
c: and stoich is a differnt ratio, so you need either longer pulses or larger injectors to achieve the same combustion ratio
D: the higher cotane means it burns more slowly and coolly, so you can run leaner OVERALL mix or more timing with e85 or higher compression (or all the above) than you cna with gas.
e: IIRc ethanol actually ignites about as easily as petrol and atomizes about as easily so you don't need some monster spark system
What would be a piston melting tune on 93 octane gasoline, and a ragged edge tune on 100 octane unleaded, is very safe on e85. Thus unless you have a flex fuel vehicle, if you tune for e85 and then have to fill up with gas, you are going to run like poo... Way way fat, and probably knock from excessive timing too.
IIRC e85 was about the 42% less energy, stioch was around 9.7:1
You would think you needed to throw 42% more fuel to make up for it, but you don't. What folks did was run ~25% more injector so you get a leaner final mix under open loop, and let the ecu find stoich with it's adaptation. Then bump the timing up 3-5 degrees.
At least that is how you do it on OBDI vehicles that my friends have converted in other places to run on it.
Problem is again that when you are NOT using e85 *** it isn't flex fuel, the timing and fueling are way off, and you get poor power and economy. you need to reflash it back.
Grocery Getter
A guy with a truck.
Good info! This is in reference to non flex fuel vehicles? If it is flex fuel all the corrosion issues are not applicable and it is set up to hand both, am I right?
---------- Post added at 11:54 AM ---------- Previous post was at 11:53 AM ----------
Yes, Flex fuel for sure. I'd never try it if mine wasn't.
Eagle
Thansk for all the help -STAFF!
Yes on flex fuels, from my limited reading about them, are set up with some mean of reading the alky content of the fuel, and thus adjust themselves back and forth.
I really should go see look at the vin to see if the tahoe is a flex fuel truck. It was from Cali, but I seriously doubt it is.
gtbigup01
Full Access Member
Does anyone have dyno graphs to back up these claims of power gains or is it just butt dyno? Do you guys ever take ur trucks to the track? Excuse my questions but I'm coming from the car world (****) no not Honda civics, but Infiniti G35 and Nissan maxima, my point is when I see talk of power gains I like to see more than words, dyno graphs or track slips. If you guys are just doing all these performance mods just for kicks, well that's kool too. I just would like to see what I'm getting before i buy
JennaBear
Resident Ninja
I have tons of dyno graphs, but we only use load bearing dynos for tuning, as we aren't interested in DynoJet numbers. If you check out performancetrucks.net, quite a few of our customers have posted their before/after time slips as well as what their current set ups are running.
gtbigup01
Full Access Member
Thank you, will chek them out and probably hit you up later for my special tune also
