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Thread: E85 Octane Booster
02-09-2014, 11:15 AM #1
E85 Octane Booster
Is there a product that will raise the octane of Pump E85? I am going to tune for racing E85 (true 85% ethanol @ 112 octane) and want to be able to run pump fuel. Which, correct me if I'm wrong, is not always a true 85% blend.2011 GT500
L&M 5.8L 1258HP/1049TQ, Magnum XL, 4.7LC Kenne Bell, just ask about the small stuff.
02-09-2014, 12:10 PM #2
Get a $20 E85 tester and test before every fill up and you will know exactly the ethanol content.Ported Eaton 17# pump gas >> Best 10.75@ 127.7 1.49 sixty
TVS 18# E85 >> 10.26 @ 136.2 1.45 sixty! More to go!
02-09-2014, 01:21 PM #3
02-09-2014, 02:47 PM #4
As stated, get the tester. If it tests E85 (and it will 99% of the time in Houston), you are good to go to massive power level capability. I would not get hung up on "octane" rating with E85....it's a whole lot more than just the octane rating, it's no comparison to gasoline. Solid tested $2.xx pump E85 is good for way over 1000 wheel power.
From the people in Houston I know that are testing E85 pumps on a regular basis...the Krogers have had extremely consistent E85, all year long
02-09-2014, 03:38 PM #5
Agreed! From what I understand, your cylinder temps will already be much lower because your burning ethanol (alcohol) instead of crappy gas. The octane is basically an extra bonus. You can run a lot more timing and make a lot more power safely on nothing but E85 out of the pump!
I love E85, its so sweet that your using a cleaner fuel for the environment, while at the same time getting a huge performance advantage.
02-10-2014, 07:23 AM #6
Thanks guys. I will order a test kit and do some sampling around Houston. New to E85 and always just thought it was "Hippie Gas". Then I lived in a place that sells it and learned all the benefits. Any more advice would be welcome.
02-10-2014, 07:36 AM #7
no reason to really test it unless you're just ultra paranoid...e90 to e70 is only about a 1/2 point AFR richer. wont hurt anything.NOT QUITE GONE YET!
02-10-2014, 08:24 AM #8
02-10-2014, 08:27 AM #9
02-10-2014, 10:18 AM #10
02-10-2014, 12:58 PM #11
I test mine every fill up and keep the sample with me as long as that fuel is in the tank lol. It takes all of two minutes before each fill up and sets my mind at ease about what im running.
02-12-2014, 02:04 PM #12
Absolutely. No sense being lazy and guessing what you just did 2 minutes after leaving a station. I have already been burned and tested an E85 pump in Houston at E45....rich codes went off half a mile down the road and that crap had to be drained. It's going to be fine and very close to E85 99% of the time, especially in Texas. But it's that 1 chance it won't be fine that makes me test it every time.
Knuckleheads are every where...and if a fuel delivery truck drops E10 gasoline by mistake into the E85 tank below, you can get burned. That's what happened when I tested E45 and the store bagged those E85 pumps and took them offline. The only way I would forget about testing is if you have incorporated a flex fuel sensor and a PCM capable of making adjustments.
02-12-2014, 02:13 PM #13
02-12-2014, 02:49 PM #14
We're going to just have to agree to disagree here, what you're suggesting is after the fact and the fuel is already in the tank. I'm not comfortable running E45 for an entire tank and throwing rich codes. I'll invest the 2 minutes to test it before pumping to get a good, solid reading.
I do agree in an emergency situation, it will run. But it's not scenario case A to me and I would either drive down the road to the next E85 pump or take my handheld and drop the E10 tune back in, fill up with 93.
02-13-2014, 12:08 AM #15
I have to disagree also, the problem with your reasoning is that once you find out its too late... you just filled the tank up with whatever is causing your problem. As I said it just takes two minutes before you squeeze the handle to fill your tank and if its not what you want hang the pump back up and leave to another station.
02-14-2014, 10:00 AM #16
I am debating installing an Ethanol reader in the glove box or trunk. So I can have the digital read out and confirm with tester
02-14-2014, 01:04 PM #17
same thing happens with all fuels out of a pump...they can be off. this is how people detonate on 93 pump gas and mess up motors.
ran e85 in my lightning for over a year and never tested it once. it was tuned on summer e85, so in the winter it just ran 1/2 point richer or so. even if you got some weird e45 tank, it would only be about a point richer...not enough to damage anything.
02-14-2014, 01:44 PM #18
yep your making a mountain out of mole hill on this one.
02-14-2014, 02:08 PM #19
This is what my issue is with your stance on this....you have absolutely zero data since you have admittedly never tested one single batch of fuel. Houston does not get winter blend E85....it has proven from testing it's summer blend all year long for the most part.....unless a mistake has been made.
You have zero data to prove you've run E45, E70 or E85. You have no concrete evidence why your a/f changed....there are several things that could contribute. My suspicion is you've run E85 almost all the time. I keep logs of what I test, I can document every fill up.
Please get the tester and help other Houston members out with what stations are consistently providing solid E85. Knowledge and tracking with a tester would be very beneficial to the Houston E85 users.
02-14-2014, 02:09 PM #20
02-14-2014, 02:11 PM #21
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