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Re: Race gas versus e-85
[Re: 69dart]
#1160929
01/22/12 07:25 PM
01/22/12 07:25 PM
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Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
RobX4406
I Live Here
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I Live Here
Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
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Quote:
How many gallons of Methanol does it take to get 50 gallons of E75 up to E85?
Is there a formula somewhere?
33 1/3 gallons to get it to E85
50 gallons of e75 has 12.5 gallons of gasoline. Take 12.5 and divide by .15 (15%) to get the total number of gallons to represent E85 83.33 gallons, subtract 50 you started with = 33.33 gallons of E100 required.
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Re: Race gas versus e-85
[Re: racerx]
#1160930
01/22/12 08:36 PM
01/22/12 08:36 PM
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Joined: Nov 2003
Posts: 3,437
Dandridge TN
Dabee
master
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master
Joined: Nov 2003
Posts: 3,437
Dandridge TN
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Quote:
Quote:
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You can pick up a left over 55 gallon drum at the track and a hand pump for $15. I filled my drum up when prices bottomed out in October. It wasn't quite E85 (tested 78) but I've heard you can add a couple gallons of Methanol to get it back to E85. Has anyone tried this?
I do it all the time. All they sell here is E-70, so I add Meth to bring it up to EM-85. Works great. I tune my AFR to .85 LAMBDA under power. I check it as soon as I'm in high gear going down the track or just before crosseing the strip.
So is that how u come up with em-85?Is this stuff u call meth Alcohol...Thax 
Yes the stuff I call meth is racing methanol. I mix 1 gallon of methanol to 1 gallon of E-70. It tests out to 85% alcohol, 15% gas. I ran it all last season with no problems. I use a QF 950 carb set up for E-85.
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Re: Race gas versus e-85
[Re: Dabee]
#1160931
01/22/12 09:44 PM
01/22/12 09:44 PM
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Joined: Aug 2008
Posts: 4,071
Mo.
racerx
OP
master
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OP
master
Joined: Aug 2008
Posts: 4,071
Mo.
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Quote:
Quote:
Quote:
Quote:
You can pick up a left over 55 gallon drum at the track and a hand pump for $15. I filled my drum up when prices bottomed out in October. It wasn't quite E85 (tested 78) but I've heard you can add a couple gallons of Methanol to get it back to E85. Has anyone tried this?
I do it all the time. All they sell here is E-70, so I add Meth to bring it up to EM-85. Works great. I tune my AFR to .85 LAMBDA under power. I check it as soon as I'm in high gear going down the track or just before crosseing the strip.
So is that how u come up with em-85?Is this stuff u call meth Alcohol...Thax
Yes the stuff I call meth is racing methanol. I mix 1 gallon of methanol to 1 gallon of E-70. It tests out to 85% alcohol, 15% gas. I ran it all last season with no problems. I use a QF 950 carb set up for E-85.
Thax.
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Re: Race gas versus e-85
[Re: RobX4406]
#1160932
01/23/12 09:55 AM
01/23/12 09:55 AM
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Joined: Dec 2006
Posts: 1,178
Indy
FlyFish
super stock
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super stock
Joined: Dec 2006
Posts: 1,178
Indy
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Quote:
Quote:
How many gallons of Methanol does it take to get 50 gallons of E75 up to E85?
Is there a formula somewhere?
33 1/3 gallons to get it to E85
50 gallons of e75 has 12.5 gallons of gasoline. Take 12.5 and divide by .15 (15%) to get the total number of gallons to represent E85 83.33 gallons, subtract 50 you started with = 33.33 gallons of E100 required.
Robx4406 has it right, here is the formula if you are interested:
C1V1=C2V2
C1= initial concentration
V1= initial volume
C2= final concentration
V2= final volume
(25% gas)(50 gallons) = (15% gas)(V2)
This give a final volume of 83.3 gallons, which subtracted from the original volume of 50 = 33.3 gallons of ethanol (EtOH) needed reach the desired concentration.
Last edited by FlyFish; 01/27/12 09:24 AM.
67 Barracuda street car, 408, e85, 1.38 60', 6.44 @105.9 in the 1/8 mile, 10.19 @130.5 in the 1/4...so far....
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Re: Race gas versus e-85
[Re: 1967dartgt]
#1160933
01/26/12 12:46 PM
01/26/12 12:46 PM
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Joined: Aug 2008
Posts: 4,071
Mo.
racerx
OP
master
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OP
master
Joined: Aug 2008
Posts: 4,071
Mo.
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Quote:
Mine slowed down due to lack of traction. Got that figured out and it was to late in season.
Thax. 4 the reply i wood like to some real world result on your 60' times.Reason i'm asking is that i made the switch and going to a smaller tire and I'm interested on how much more torque this fuel makes over gas Thax...........
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Re: Race gas versus e-85
[Re: 69dart]
#1160934
01/26/12 02:52 PM
01/26/12 02:52 PM
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Joined: Jan 2003
Posts: 16,928
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,928
NC
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Quote:
You can pick up a left over 55 gallon drum at the track and a hand pump for $15. I filled my drum up when prices bottomed out in October. It wasn't quite E85 (tested 78) but I've heard you can add a couple gallons of Methanol to get it back to E85. Has anyone tried this?
Just remember, a mix of methanol, ethanol, and gasoline will have a different stoichiometric ratio than real E85 (85% ethanol and 15% gasoline). This means the optimum air/fuel mixture is different for the two blends.
Stoichiometric ratio:
Gasoline 14.7
Methanol 6.4
Ethanol 9.0
E85 9.76
Mixing in methanol to bring the total alcohols up to 85% will have a lower A/F mixture then 9.76 (ie need more fuel volume)
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Re: Race gas versus e-85
[Re: racerx]
#1160936
01/26/12 09:42 PM
01/26/12 09:42 PM
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Joined: Jan 2003
Posts: 16,928
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,928
NC
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Quote:
I mix 1 gallon of methanol to 1 gallon of E-70. It tests out to 85% alcohol, 15% gas.
As long as you tuned your combo for the mix, it is not an issue. But if you put 85% ethanol into the car, you would need to lean out the carb 10-15% (since it was tuned for the methanol mix).
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Re: Race gas versus e-85
[Re: 440Jim]
#1160937
01/27/12 12:35 AM
01/27/12 12:35 AM
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Joined: Nov 2003
Posts: 3,437
Dandridge TN
Dabee
master
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master
Joined: Nov 2003
Posts: 3,437
Dandridge TN
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Quote:
Quote:
I mix 1 gallon of methanol to 1 gallon of E-70. It tests out to 85% alcohol, 15% gas.
As long as you tuned your combo for the mix, it is not an issue. But if you put 85% ethanol into the car, you would need to lean out the carb 10-15% (since it was tuned for the methanol mix).
Jim, Yes it is tuned for the mix.
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