# E85 who knows about it/ runs it?
**URL:** https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698
**Category:** NYSpeed Automotive
**Created:** [January 28, 2010, 6:45am UTC](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698 "2010-01-28T06:45:26Z")
**Posts on this page:** 18
**Page:** 2
### Author:  [@Inn-Tune](https://forums.speedlife.net/u/Inn-Tune)
#### Post date: [January 28, 2010, 2:51pm UTC](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698/21 "2010-01-28T14:51:02Z")
> [@deebo](#):
>
> I thought you’re supposed to empty your tank, or run it completely to E everytime you switch from e85 to 93…
>
> it’s not like you can have a quarter tank of e85 in and say [sarcasm] “oh shit, im low on gas. but e85 station is 900miles away, ill just throw in some 93oct and be good!” [/sarcasm]
You are correct.
> [@cobraman04](#):
>
> ^this is true another reason why im not sure which route i want to go, if i were to run a 100 oct. and a 93 tune i could just switch the tune if i was low on 100 and use 93
You could go back and forth safely by running the 93 tune until you had straight 100 in the tank or the mix of 93 and 100 in the tank that you were tuned for. For example some of our customers that have race gas tunes don’t want to drain their tanks so we figure out that they’ll run their car down to 1/8 tank or less on 93, then put in X gallons of the race gas they’re tuned on. Then in the future they just need to run their tank down to 1/8 tank or less on pump and put X or more gallons of the race gas they were tuned on in the tank, and switch to their race map.
You can’t do this with an ethanol mix. The mix in the tank has to be the same every time or you have to adjust the tune unless you have the ideal setup I talked about above.
As the cost of E98 (98% ethanol) comes down we’ll be able to bring the price down for the blends we sell. We currently pay way more here than people do in the mid west and other areas where ethanol is plentiful because we have to freight it here in drums over a significant distance and that isn’t cheap.
The rally car runs E98 with rally legal unleaded fuel. He mixes that himself.
For reference, the fuel I ran 3 years ago in my Subaru from an E85 pump in Ontario turned out to be 65% ethanol when tested and that was in the middle of summer.
---
### Author:  [@cobraman04](https://forums.speedlife.net/u/cobraman04)
#### Post date: [January 28, 2010, 7:53pm UTC](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698/22 "2010-01-28T19:53:39Z")
its looking like itll be cheaper overall to run 100oct
---
### Author:  [@NYstanger](https://forums.speedlife.net/u/NYstanger)
#### Post date: [January 28, 2010, 7:56pm UTC](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698/23 "2010-01-28T19:56:39Z")
> [@cobraman04](#):
>
> its looking like itll be cheaper overall to run 100oct
What kinda hp goals are you shooting for?
---
### Author:  [@cobraman04](https://forums.speedlife.net/u/cobraman04)
#### Post date: [January 29, 2010, 5:16am UTC](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698/24 "2010-01-29T05:16:57Z")
> [@NYstanger](#):
>
> What kinda hp goals are you shooting for?
23psi 600+ rwhp
---
### Author:  [@Inn-Tune](https://forums.speedlife.net/u/Inn-Tune)
#### Post date: [January 29, 2010, 5:30am UTC](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698/25 "2010-01-29T05:30:50Z")
While you could make more on the race blend ethanol we mix, you can achieve that on 100 and it will be more convenient.
---
### Author:  [@08GT500](https://forums.speedlife.net/u/08GT500)
#### Post date: [January 29, 2010, 5:34am UTC](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698/26 "2010-01-29T05:34:44Z")
> [@cobraman04](#):
>
> 23psi 600+ rwhp
Cats outta the bag eh?
---
### Author:  [@cobraman04](https://forums.speedlife.net/u/cobraman04)
#### Post date: [January 29, 2010, 5:37am UTC](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698/27 "2010-01-29T05:37:00Z")
> [@Inn-Tune](#):
>
> While you could make more on the race blend ethanol we mix, you can achieve that on 100 and it will be more convenient.
i was thinking the same thing, maybe when e85 is more readily available then make the switch, looks like ill be doing a 100 oct. tune for kill mode and a 93 tune for cruising/ trips etc
---
### Author:  [@cobraman04](https://forums.speedlife.net/u/cobraman04)
#### Post date: [January 29, 2010, 5:37am UTC](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698/28 "2010-01-29T05:37:57Z")
> [@08GT500](#):
>
> Cats outta the bag eh?
its still :snky: lol 23 psi could be a lot of things…
---
### Author:  [@Justin](https://forums.speedlife.net/u/Justin)
#### Post date: [January 29, 2010, 1:10pm UTC](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698/29 "2010-01-29T13:10:07Z")
@23psi you should make way more than 600WHP.
---
### Author:  [@deebo](https://forums.speedlife.net/u/deebo)
#### Post date: [January 29, 2010, 1:38pm UTC](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698/30 "2010-01-29T13:38:04Z")
What about meth?
---
### Author:  [@cobraman04](https://forums.speedlife.net/u/cobraman04)
#### Post date: [January 29, 2010, 2:11pm UTC](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698/31 "2010-01-29T14:11:44Z")
> [@Justin](#):
>
> @23psi you should make way more than 600WHP.
thats like a minimum estimate i dont want to be overly optimistic
---
### Author:  [@NYstanger](https://forums.speedlife.net/u/NYstanger)
#### Post date: [January 29, 2010, 3:58pm UTC](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698/32 "2010-01-29T15:58:46Z")
> [@cobraman04](#):
>
> thats like a minimum estimate i dont want to be overly optimistic
eaton combos are putting down like 525 now. lol I’d say with an aftermarket blower or turbo and 23 psi your being OVERLY nice.
---
### Author:  [@Inn-Tune](https://forums.speedlife.net/u/Inn-Tune)
#### Post date: [April 23, 2011, 11:38am UTC](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698/33 "2011-04-23T11:38:20Z")
We have E98 as well as E85 now in case anyone is looking for it.
---
### Author:  [@yunvme666](https://forums.speedlife.net/u/yunvme666)
#### Post date: [April 24, 2011, 6:34am UTC](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698/34 "2011-04-24T06:34:24Z")
whats the price on those blends?
---
### Author:  [@FadetoBlack](https://forums.speedlife.net/u/FadetoBlack)
#### Post date: [July 17, 2011, 7:56pm UTC](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698/35 "2011-07-17T19:56:01Z")
Bump.
My buddy (who I really trust) just convinced me to fill my 17 gallon tank with 13.5 gallons of 93 and 3.5 gallons of E85.
We did a control run on straight 93 and at WOT the computer advanced the timing 13 degrees. Did another WOT run after filling up with the combination and it advanced timing 16 degrees. So I’m thinking it helps me make more power.
My buddy assured me that because my car has a knock sensor that it will just adjust timing for different overall octane levels and therefore won’t mess anything up. Is any of this stuff true? He’s used it in working on the drag car he’s building and he’s put it in his DD and hasn’t had any issues. Schwidley put some in his DD and actually ran a slightly faster run at Thunderdome (lol) with a little bit of E85 in the tank.
I guess I’m just looking to see if anyone knows more about E85 and if it will fuck anything up if you put it into a regular car.
ADDED:
From wikipedia (with no citation):
Because of the lower heating value E85 has a cooler intake charge—which, coupled with its high stability level from its high octane rating—has also been used as a “power adder” in turbocharged performance vehicles. These modifications have not only resulted in lower GHG emissions, but also resulted in **_10-12% power and torque increase at the wheels._** Because of its low price (less than $2.00/gal in some places) and high availability in certain areas people have started to turn to using it in place of high-end racing fuels, which typically cost over $10.00/gal.
> **[E85](https://en.wikipedia.org/wiki/E85)**
>
> E85 is an abbreviation typically referring to an ethanol fuel blend of 85% denatured ethanol fuel and 15% gasoline or other hydrocarbon by volume. In the United States, the exact ratio of fuel ethanol to hydrocarbon may vary according to ASTM 5798 that specifies the allowable ethanol content in E85 as ranging from 51% to 83%. This is due to the lower heating value of neat ethanol making it difficult to crank engines in relatively cold climates without pre-heating air intake, faster cranking, or m...
---
### Author:  [@Haenszel](https://forums.speedlife.net/u/Haenszel)
#### Post date: [July 18, 2011, 6:35am UTC](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698/36 "2011-07-18T06:35:38Z")
> [@FadetoBlack](#):
>
> Bump.
>
> My buddy (who I really trust) just convinced me to fill my 17 gallon tank with 13.5 gallons of 93 and 3.5 gallons of E85.
>
> We did a control run on straight 93 and at WOT the computer advanced the timing 13 degrees. Did another WOT run after filling up with the combination and it advanced timing 16 degrees. So I’m thinking it helps me make more power.
>
> My buddy assured me that because my car has a knock sensor that it will just adjust timing for different overall octane levels and therefore won’t mess anything up. Is any of this stuff true? He’s used it in working on the drag car he’s building and he’s put it in his DD and hasn’t had any issues. Schwidley put some in his DD and actually ran a slightly faster run at Thunderdome (lol) with a little bit of E85 in the tank.
>
> I guess I’m just looking to see if anyone knows more about E85 and if it will fuck anything up if you put it into a regular car.
>
> ADDED:
>
> From wikipedia (with no citation):
>
> Because of the lower heating value E85 has a cooler intake charge—which, coupled with its high stability level from its high octane rating—has also been used as a “power adder” in turbocharged performance vehicles. These modifications have not only resulted in lower GHG emissions, but also resulted in **_10-12% power and torque increase at the wheels._** Because of its low price (less than $2.00/gal in some places) and high availability in certain areas people have started to turn to using it in place of high-end racing fuels, which typically cost over $10.00/gal.
>
> [E85 - Wikipedia](http://en.wikipedia.org/wiki/E85)
You are really supposed to add ~30% fuel to get a/f correct. E85 requires more fuel to get the same lambda. I’ve recently switched from 93, and honestly the car seems to run much smoother on the exact same map w/just the lambda dialed in. Feels like how my old engine did on Q16, engine feels nice and tight in the high revs compared to when running 93. Going back for a re-map this week, so I’ve yet to see any real power gains however my MPG has obviously dropped – from about 21 to 15MPG.
---
### Author:  [@FadetoBlack](https://forums.speedlife.net/u/FadetoBlack)
#### Post date: [July 20, 2011, 1:45pm UTC](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698/37 "2011-07-20T13:45:23Z")
> [@Haenszel](#):
>
> You are really supposed to add ~30% fuel to get a/f correct. E85 requires more fuel to get the same lambda. I’ve recently switched from 93, and honestly the car seems to run much smoother on the exact same map w/just the lambda dialed in. Feels like how my old engine did on Q16, engine feels nice and tight in the high revs compared to when running 93. Going back for a re-map this week, so I’ve yet to see any real power gains however my MPG has obviously dropped – from about 21 to 15MPG.
Sorry for the late reply.
Dumb question but ~30% fuel? So what’s an appropriate mixture then? Or are you talking about injectors?
And yeah I read about the mileage drop, and now I know from personal experience that it’s there. haha
---
### Author:  [@Haenszel](https://forums.speedlife.net/u/Haenszel)
#### Post date: [July 20, 2011, 1:53pm UTC](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698/38 "2011-07-20T13:53:49Z")
> [@FadetoBlack](#):
>
> Sorry for the late reply.
>
> Dumb question but ~30% fuel? So what’s an appropriate mixture then? Or are you talking about injectors?
>
> And yeah I read about the mileage drop, and now I know from personal experience that it’s there. haha
Under load its generally said about .8 lambda, at least for FI cars.
FYI, hit the dyno last night. gained **40% power** (obviously with boost increase) over 93+ methanol till my ignition started giving trouble.
[Previous page](https://forums.speedlife.net/t/e85-who-knows-about-it-runs-it/78698.md?page=1)