E85 vs 100+ octane.
this may sound stupid but without an ethanol sensor like flex fuel vehicles have from the factory how does the ecm compensate for differences in alcohol content? Testing at the pump has shown that most if not all E85 isn't 85% and varies as much as 20% based on winter/summer blends especially up north. I may be dumb here but that seems like it would cause rich/lean issues.....
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
We test here, it stays pretty consistent at 70 percent. If it varies to much I will rewrite the VE and save it for that blend and switch back and forth. A hassle if you drive a lot but luckily I dont.
I tend to learn things the hard way.
The 1300's will meet my goal though, just no room to spare on straight E85
my shop had a guy who bought ID1000s then ID1300s and eventually ID1700s and he really wished he had gone straight to 1700s so that is what recommended I do.
They also said I will need to test my E85 when I get it and I can add some E98 to it if need to be bring up the level if it is too low.
They also said I will need to test my E85 when I get it and I can add some E98 to it if need to be bring up the level if it is too low.
yea see that would drive me crazy. I'd love to do it because the difference in fuel cost but the stations are kinda far from me and I'd rather pump it straight in the tank. I will be driving it on a low boost setting on the street and I'd love to just run one fuel between low and high for simplicity and cost but not looking realistic for me... I'm on a factory ecm as well so switching up tunes won't be that easy for me either
this may sound stupid but without an ethanol sensor like flex fuel vehicles have from the factory how does the ecm compensate for differences in alcohol content? Testing at the pump has shown that most if not all E85 isn't 85% and varies as much as 20% based on winter/summer blends especially up north. I may be dumb here but that seems like it would cause rich/lean issues.....
TECH Junkie
Joined: Jul 2015
Posts: 3,012
Likes: 48
TECH Junkie
Joined: Jul 2015
Posts: 3,012
Likes: 48
my shop had a guy who bought ID1000s then ID1300s and eventually ID1700s and he really wished he had gone straight to 1700s so that is what recommended I do.
They also said I will need to test my E85 when I get it and I can add some E98 to it if need to be bring up the level if it is too low.
They also said I will need to test my E85 when I get it and I can add some E98 to it if need to be bring up the level if it is too low.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo I am still running the T56 for now, will be changing that out to TH400 in the best future. My shop doesn't tune like that, they are a little on the conservative side which is good.
TECH Junkie
Joined: Jul 2015
Posts: 3,012
Likes: 48
If that bitch ever hooks at 1krwhp.....RIP t56. Your car is going to be retarded fast when you go th400.
TECH Junkie
Joined: Jul 2015
Posts: 3,012
Likes: 48
this may sound stupid but without an ethanol sensor like flex fuel vehicles have from the factory how does the ecm compensate for differences in alcohol content? Testing at the pump has shown that most if not all E85 isn't 85% and varies as much as 20% based on winter/summer blends especially up north. I may be dumb here but that seems like it would cause rich/lean issues.....
Also If you tune it leanish on e85 it will richen up with lower alky percentages. Lower the ethanol content the richer it will become, so you'll never "lean out" if you tune it on your highest percentage.
Even without the flex sensor you can run most systems in closed loop with a WB02. This will account for the minor changes in ethanol content. 10% variations were common here and my ms3 handled it no problem without the flex sensor. I run the flex setup in another car and it's pretty sweet for the 30$ worth of parts it took to install.
Also If you tune it leanish on e85 it will richen up with lower alky percentages. Lower the ethanol content the richer it will become, so you'll never "lean out" if you tune it on your highest percentage.
Also If you tune it leanish on e85 it will richen up with lower alky percentages. Lower the ethanol content the richer it will become, so you'll never "lean out" if you tune it on your highest percentage.
you have brought a very valid point about running a high alcohol content for tuning and it can only richen up from there! Can't believe I didn't think of it like that. 100 octane is $7.45 110 is $7.95, E85 is 20 cent cheaper than regular, seams the route I'm taking! 40min drive for me though...
TECH Addict
Joined: Oct 2016
Posts: 2,513
Likes: 480
From: PDX-OR-USA
Its best to NOT store E85 or any Alcohol fuel in plastic for extended periods, it will water saturate. Alchy likes lined metal storage, you can get refurbished 15 gallon drums at most chem supply houses. Or they also sell nice stackable 5 gal lined steel pony cans.
Buy the gasoline decal from a fuel distributor for it to pacify the DOT, and it makes a drum a legal fuel container...
Buy the gasoline decal from a fuel distributor for it to pacify the DOT, and it makes a drum a legal fuel container...