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Too much time on my hands, what do you think of this,,,
#1337724
11/19/12 12:11 PM
11/19/12 12:11 PM
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Joined: Jan 2003
Posts: 10,010
Frostbitefalls MN (Rocky&Bullw...
gregsdart
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 10,010
Frostbitefalls MN (Rocky&Bullw...
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A lot of guys may be interested in going to E85 but may not want to spend the $$ for some of the needed upgrades. So has anyone tried mixing E85 with pump 92 for a good compromise that would let a guy run decent compression, and just rejet for the extra needed fuel? Just off the top of my head a 50/50 mix would require 20 percent more fuel, not to hard to do. Octane should come in at about 97 to 98, enough to run some serious compression. Thoughts?
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Too much time on my hands, what do you think of this,,,
[Re: gregsdart]
#1337726
11/23/12 03:51 PM
11/23/12 03:51 PM
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Joined: May 2008
Posts: 1,131
Thigh-Gap Junction
@#$%&*!
New user name, Same old jerk!
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New user name, Same old jerk!
Joined: May 2008
Posts: 1,131
Thigh-Gap Junction
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Quote:
A lot of guys may be interested in going to E85 but may not want to spend the $$ for some of the needed upgrades. So has anyone tried mixing E85 with pump 92 for a good compromise that would let a guy run decent compression, and just rejet for the extra needed fuel?... Thoughts?
I've been doing it for several years now and was up to 60% E at one time. My engine would probably run great on pump 92 (11:1 compression, too much cam) but I mix pump 87 with E85 and both are cheaper than the 92. Last season I was running E25 mainly because it works with the jets I have for my extensively modified Holley 9377 (1150).
I don't have enough compression to benefit from E85 but I do like the cooler running and added octane from the ethanol and the 25cents per gallon cheaper than pump 92 is a bonus. Also, since I don't need much E85 I can buy 5-6 gallons and only need to get some fresh pump 87 and mix it up when needed. I have to drive all the way across town to get E85 these days. Mixing is a little work and I sometimes have to use algebra to figure out how much E10 (pump 87) to mix with a known amount of E85 to get a target ethanol blend %. Getting E25 from E10 and E85 just requires a 4:1 mix. I'm thinking simple/typical carb tuning changes would do the job at a measly 25% and might benefit those racing in hotter parts of the country. It NEVER gets hot here compared to what most people have to endure at times.
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