E85 More Horsepower? etc.

Well felllas i was just curious about this stuff and if anyone has tried it. I had seen a guy on PT that ran e85 in his truck and it was a second faster than the other full bolt on 6.2s if I am not mistaken. I have a few questions.

1. How much HP would e85 give on a 6.2 and are there any other advantages?
2. I know did decreases mileage. How much really? I wanna say it is 50 cents cheaper than reg gas here but i dont care. i would just run it when i felt like going fast :burnrub:
3. Will it adjust with a Nelson Tune like it does from 87-93? or do i need to buy hp tuners?
4. is e85 safe for nitrous, turbos, or superchargers?

i dont wanna come off as an idiot. i just have not read much about this as i dont see that many people use it.

Thanks fellas!

e85 on a N/A setup really isnt worth it, you will use 30% more fuel than you do with 93 and would have to swap between tunes if you wanted to see any gains. You could swap between it and 93 without chaining tunes but all you will be doing is burning more fuel and wasting taxpayers (my) money...

I cant say from personal experience but the guy you are talking about (area47) says because e85 is around 103 octane he can run much more timing on e85 compared to his 93 tune and he said he was able to pick up close to a full second in the 1/4 with his timing change. If it was available where i lived i would run it!

Whats the truck running?

12.7s boltons only

I love the stuff but im boosted. I wouldnt run it n/a accept maybe at the track. The mpg is really crappy.

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Originally Posted by 11 6.2

12.7s boltons only

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Is it a rcsb? Or ext cab/cc

I guess I'm confused on E85. I thought it was 85 octane and that is why it takes more to get a good burn. If it was 110 octane wouldn't it burn better? My truck is SD tuned and runs like crap on e85. Which would make sense if it takes more fuel and your mpg go down. I obviously know nothing about this so someone school us.

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Originally Posted by Ls2Aero

Is it a rcsb? Or ext cab/cc

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I'm pretty sure the truck is a 2wd crew cab that he tuned on his own.

From what I read it is 85% alcohol and 15% gasoline. Burns cleaner and came out so our country wont be so dependant on oil.

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Originally Posted by LUC666

I guess I'm confused on E85. I thought it was 85 octane and that is why it takes more to get a good burn. If it was 110 octane wouldn't it burn better? My truck is SD tuned and runs like crap on e85. Which would make sense if it takes more fuel and your mpg go down. I obviously know nothing about this so someone school us.

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Almost pointless without an e85 specific tune. Higher knock rating equals more timing equals more hp, so e85 by its self does not increase hp. However, in certain applications it allows more hp to be gained.

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Originally Posted by NoTaTurBo

Well felllas i was just curious about this stuff and if anyone has tried it. I had seen a guy on PT that ran e85 in his truck and it was a second faster than the other full bolt on 6.2s if I am not mistaken. I have a few questions.

1. How much HP would e85 give on a 6.2 and are there any other advantages? 1600-1800hp how much would you like to make?
2. I know did decreases mileage. How much really? I wanna say it is 50 cents cheaper than reg gas here but i dont care. i would just run it when i felt like going fast :burnrub:
3. Will it adjust with a Nelson Tune like it does from 87-93? or do i need to buy hp tuners?You would need 2 tunes so either a spare pcm with an e85 tune or hptuners and "write entire" when downloading tunes for the fuel you're using at the time
4. is e85 safe for nitrous, turbos, or superchargers?<-- This is the only time I would use it... Just not needed for N/A, see below

i dont wanna come off as an idiot. i just have not read much about this as i dont see that many people use it.

Thanks fellas!

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Don't read into this too negative but dropping a second in the quarter mile isn't going to happen by just adding 10* of timing on a bolt on truck. Not all the truth is being told...

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Originally Posted by LUC666

I guess I'm confused on E85. I thought it was 85 octane and that is why it takes more to get a good burn. If it was 110 octane wouldn't it burn better? My truck is SD tuned and runs like crap on e85. Which would make sense if it takes more fuel and your mpg go down. I obviously know nothing about this so someone school us.

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e85 is comparable to 114-115 octane because of it's make up and how it burns and how much is used. Octane has nothing to do with why certain fuels need more or less fuel... it's the stoich of the fuel among other things like if it's oxygenated and so on. regular gas has a stoich of say 14.7... what you get at the pump now-a-days has ethanol in it, up to 10%... The new stoich of pump gas is around 14.2 depending on the seasonal blend you get. C16 has a stoich of around 15.0, depending on the brand. E85 has a stoich of 9.8 ish... To simplify, the lower the stoich the more fuel/volume you need. Say your setup is happy with 12.5 AFR WOT,verified by checking the plugs on "the new" pump gas (stoich of 14.2)... If you change to e85 (stoich of 9.8) you might be looking for 7.8-8.0 AFR WOT on the same setup, again verified by reading the plugs. Every setup is different, so don't take the numbers I threw out as fact...

The truck is a CCSB 2wd with 3.73s and bolt ons from what I've seen. The truck lives on e85... he never fills it with gas. IDK what else he's doing to get that 12.7, but I've yet to see anything come that close to him.

I love E85 especially when I pull up to the pump and its $2.62 a gallon...

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Originally Posted by DBRODS

I love E85 especially when I pull up to the pump and its $2.62 a gallon...

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Yeah, but then you have to pull up to it again 100 miles down the road.

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Originally Posted by pl4yboy

Yeah, but then you have to pull up to it again 100 miles down the road.

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usually around 150miles. Before I switched I was getting 12-13mpg on 93 and couldn't run much timing due to higher compression. Mpg has only dropped a little, I average about 10-11 now on fill ups with E85, so no big deal. The price per mile with 93/E85 isn't much difference and actually the E85 is a little cheaper to use. So its a win/win for me. Plus I keep drums of it at the shop so its always available..

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Originally Posted by PurpleMinivan

Don't read into this too negative but dropping a second in the quarter mile isn't going to happen by just adding 10* of timing on a bolt on truck. Not all the truth is being told...



e85 is comparable to 114-115 octane because of it's make up and how it burns and how much is used. Octane has nothing to do with why certain fuels need more or less fuel... it's the stoich of the fuel among other things like if it's oxygenated and so on. regular gas has a stoich of say 14.7... what you get at the pump now-a-days has ethanol in it, up to 10%... The new stoich of pump gas is around 14.2 depending on the seasonal blend you get. C16 has a stoich of around 15.0, depending on the brand. E85 has a stoich of 9.8 ish... To simplify, the lower the stoich the more fuel/volume you need. Say your setup is happy with 12.5 AFR WOT,verified by checking the plugs on "the new" pump gas (stoich of 14.2)... If you change to e85 (stoich of 9.8) you might be looking for 7.8-8.0 AFR WOT on the same setup, again verified by reading the plugs. Every setup is different, so don't take the numbers I threw out as fact...

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thank you sir!

e85 burns cleaner right? therefore better for your motor right?

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Originally Posted by pl4yboy

Yeah, but then you have to pull up to it again 100 miles down the road.

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u should run an e85 tune at SAR and see what your beast runs.

It does burn a LOT cleaner. You also get a much cooler Air/fuel charge into the cylinder. (Just another point I didn't see mentioned)

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Originally Posted by Frenchy

It does burn a LOT cleaner. You also get a much cooler Air/fuel charge into the cylinder. (Just another point I didn't see mentioned)

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Which, along with the high octain rating, is why FI vehicles love it so much. Correct?

Yep.

wasnt aware there was different brands of c16.............

Yes the amount of ethanol injected into the cylinder gives it awesome cooling and burns hot which helps spool a little faster

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Originally Posted by sprayedenali

wasnt aware there was different brands of c16.............

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VP is the one you're referring to... Sunoco makes an equivalent and is what I was running. $8 a gallon when I was using it vs $12ish for VP.

The fact that E85 is 35% oxygenated has nice benefits..

It also smells better then regular gas. But not as good as c16

hey chevylee i noticed you are "dbrods secretary" we got a name for secretaries around here...

Is it worth running on a n/a w full bolt ons in a nbs truck w a tune???

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Originally Posted by pillittokillit04

Is it worth running on a n/a w full bolt ons in a nbs truck w a tune???

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In answer:

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Originally Posted by 408.Luke

e85 on a N/A setup really isnt worth it, you will use 30% more fuel than you do with 93 and would have to swap between tunes if you wanted to see any gains. You could swap between it and 93 without chaining tunes but all you will be doing is burning more fuel and wasting taxpayers (my) money...

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Area47 is an extended cab truck, below is his signature from pt.net. I really like his truck and he comes off as a cool guy.

For comparison my truck was running 13.4s @ 103s with out headers in 95 degree heat.

I heard he has done a lot of tuning and switched to the e85, but I rarely ever get on that forum any more so I haven't been keeping up with his truck.

12.7s sound nice from a bolt-on ec 6.2 though.


2010 ecsb 6.2 2wd | 379/401 | 13.32@103.01.{2010 time, has gone faster}
Kooks 1 7/8's LT's | catted 3in y | magnaflow muffler | k&n drop in filter | Airaid M.I.T. | ported ls7 tb | my personal tune


Edit: And I am with the majority of the guys who posted in front of me that it really isn't needed N/A.

Those pesky ecsb 2wds!

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Originally Posted by SilverSleeper

Edit: And I am with the majority of the guys who posted in front of me that it really isn't needed N/A.

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It will run better NA but like Luke said, its not worth it. You have to upgrade your fuel lines, fuel pump, and injectors.. Which that will get expensive real quick. Personally I like running it just because it burns cleaner, gets rid of the nasty gas smell, is cheaper, and my truck runs a lot better on it.

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Originally Posted by ChevyLee

It will run better NA but like Luke said, its not worth it. You have to upgrade your fuel lines, fuel pump, and injectors.. Which that will get expensive real quick. Personally I like running it just because it burns cleaner, gets rid of the nasty gas smell, is cheaper, my truck runs a lot better on it and Jon and Kurt run it.

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Fixed.

Don't forget Luke, oh and it burns a lot cooler.. Makes everything cooler under the hood.

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Originally Posted by PurpleMinivan

... e85 is comparable to 114-115 octane because of it's make up and how it burns and how much is used. Octane has nothing to do with why certain fuels need more or less fuel... it's the stoich of the fuel among other things like if it's oxygenated and so on. regular gas has a stoich of say 14.7... what you get at the pump now-a-days has ethanol in it, up to 10%... The new stoich of pump gas is around 14.2 depending on the seasonal blend you get. C16 has a stoich of around 15.0, depending on the brand. E85 has a stoich of 9.8 ish... To simplify, the lower the stoich the more fuel/volume you need. Say your setup is happy with 12.5 AFR WOT,verified by checking the plugs on "the new" pump gas (stoich of 14.2)... If you change to e85 (stoich of 9.8) you might be looking for 7.8-8.0 AFR WOT on the same setup, again verified by reading the plugs. Every setup is different, so don't take the numbers I threw out as fact...

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In conjunction with what you've said here, something a lot of people don't understand about octane ratings is the higher the octane, the harder it is to burn. If you add a straight water injection on your vehicle (sans methanol), your octane rating goes up by about 10 points. Remember water doesn't burn (duh), so this makes sense. Thought I'd add.

I run E85 on my 05 avi and love it. It made the engine run smoother and snappier. It smells alot better and I only lost 1-2 mpg in town and its .70 to .75 cents cheaper a gallon.

One thing I wonder is can any of the tuners make a tune that retains the flex fuel capabilities and adds power with gas or e85 without having to change anything.

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Originally Posted by 1994silverado

I run E85 on my 05 avi and love it. It made the engine run smoother and snappier. It smells alot better and I only lost 1-2 mpg in town and its .70 to .75 cents cheaper a gallon.

One thing I wonder is can any of the tuners make a tune that retains the flex fuel capabilities and adds power with gas or e85 without having to change anything.

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I would say yes depending on the vehicle.

You know it's actually more expensive here for E85 than it is for petro? There is one station in the neighborhood (another one north of here about 40 miles). Huge sign out front showing E85 about $.05-.10 more expensive per gallon, depending on the day.