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E85 or 100 octane
- Thread starter FracaSHO
- Start date
wasinger3000
New member
I'm going to ask torrie to make me a 100 octane tune once I get my e98. Should be interesting.
20 ish % Gotcha! Sounds real interesting. What would be a good guesstimate for the octane equivalent of that mix?FoMoCoSHO said:I'm at 8 gallons and 43%.Larrylu said:What kind of numbers would you expect to get if you only added a couple of gallons of E85 to a fill up on E10 / 93 octane?
So you have 1.9 to start plus 2 more which should put you around 20ish percent.
There are several portable octane testing instruments available out there. last I heard they were about $7-1000.
Just saying that if you are gonna play the mixing fuel game with your car maybe it is a worthy investment?
http://www.shatox.com/index.html
http://www.zeltex.com/portable/zx-101c.html
Just saying that if you are gonna play the mixing fuel game with your car maybe it is a worthy investment?
http://www.shatox.com/index.html
http://www.zeltex.com/portable/zx-101c.html
There is more than one way to skin a cat.kinder said:There are several portable octane testing instruments available out there. last I heard they were about $7-1000.
Just saying that if you are gonna play the mixing fuel game with your car maybe it is a worthy investment?
http://www.shatox.com/index.html
http://www.zeltex.com/portable/zx-101c.html
Dicking around testing fuel while I'm filling up just sounds like a terrible way to keep my car from smelling like fuel. I am guaranteed to spill fuel on myself.
Anyhoo, it occurred to me tonight that the car might help us figure this out, if you know your average and/or WOT LTFT's on straight 93 and a blend....
Comparing average LTFT's on straight 93 as a baseline to now at approx e-43 (calculated with Torque, msds sheets, receipts and a the online E-85 calculator), I know my car is enriching at an average of 14% on both banks. By average I mean the trim #'s I see most of the time after the ECU adjusts to a new blend.
100 percent E-85 requires around 30% more fuel so working backwards this puts my blend at 46.6% . So 3.3 % higher than my figures. I feel this is a reasonable margin of error since I haven't always been 100% accurate losing a receipt from time to time soooo some of my existing percentages may have been a little off when doing the calculations.
I'd like to recalculate this with WOT Trims but would require me to run the corn out as somehow I never noted my WOT trims on 93(derp). Since my tuner will be arriving soon, I probably need to do that anyway, so i can get to whatever baseline Mr. Torrie suggests.
Of course, I could be completely wrong in my thinking.
I ran it through the calculator found here...Larrylu said:20 ish % Gotcha! Sounds real interesting. What would be a good guesstimate for the octane equivalent of that mix?FoMoCoSHO said:I'm at 8 gallons and 43%.Larrylu said:What kind of numbers would you expect to get if you only added a couple of gallons of E85 to a fill up on E10 / 93 octane?
So you have 1.9 to start plus 2 more which should put you around 20ish percent.
http://www.intercepteft.com/calc.html
E-18
94.3 0ctane
IHeartGroceries
New member
I have to say, anything that is mildly affordable likely is not accurate. The machines which are routinely calibrated and are approved to meet ATSM standard repeatability are tens of thousands of dollars.
We have a piece of equipment in our lab which performs both ETOH content and RON (calculated) analysis (among many, many others). Though, this particular device isn't recognized for its accuracy for either, it is a good ballpark. Its cost is over 30K.
What's more, it costs in the thousands for single sample analysis in third party labs, such as SWRI and Alcor.
My point is, anything mildly affordable is probably okay for amateur use, but don't expect any scientific results from it.
Sent from my SM-N900V using Tapatalk
We have a piece of equipment in our lab which performs both ETOH content and RON (calculated) analysis (among many, many others). Though, this particular device isn't recognized for its accuracy for either, it is a good ballpark. Its cost is over 30K.
What's more, it costs in the thousands for single sample analysis in third party labs, such as SWRI and Alcor.
My point is, anything mildly affordable is probably okay for amateur use, but don't expect any scientific results from it.
Sent from my SM-N900V using Tapatalk
So I've been avoiding (phone put "the tax penalties" for next word options right there...lol) reading this thread as I'm still learning alot about our SHO. Thinking about heading to Milan today for test and tune now that the 3 bar tune is running. Do you guru's think a few gallons into a half tank would help me out a bit at the track today. Maybe I should go without mix this time and test against next time?
That would be a roughly 30 percent mix right off the bat. It will take some time for the car to trim that out....so no.SHOnUup said:So I've been avoiding (phone put "the tax penalties" for next word options right there...lol) reading this thread as I'm still learning alot about our SHO. Thinking about heading to Milan today for test and tune now that the 3 bar tune is running. Do you guru's think a few gallons into a half tank would help me out a bit at the track today. Maybe I should go without mix this time and test against next time?
Maybe but the bigger problem I just realized is you have a 2011. Everyone says e-85 is like kryptonite on gen 4.1 and all my experiences are on 4.2 with the updated LPFP. So my advice is slow and steady, starting at 2 gallons and seeing what happens......slowly.SHOnUup said:40 miles to track?