Too much time on my hands, what do you think of this,,,

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? 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?

---

Not to shoot your idea down but: To get any real HP gains you would have to build accordingly ( CR wise at least). Mixing would be an additional hassle. Availability could be a hassle. Not too practicle for the street ( MPG loss ) and a comprimise for the track. Back to the old " which world do you want to run in").

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.