vaticano

iTrader: (8)

Yes, I use 100% E-85 all the time. When I get the $$ for dyno time I want to see if there is any gain to be had by adding more fuel.

I will likely add a bit anyway due to the high compression and I will pully down the D1SC when I get some time on the motor and compare my new #'s to the old.

02*C5

iTrader: (1)

The other thing that i don't think it has been mentioned is the 30% loss of economy. You will use more e85 and that is whats a kicker in some places it will turn out to be cheaper to use gas if your doing this to a DD than it would be to keep it regular gas.

vaticano

iTrader: (8)

Not true.
I got 30-31 mpg before I switched and added the blower.
After I swithed I got 24 mpg.
That's only a 20% reduction and I doubled my HP while doing it.

JFM-jr

iTrader: (23)

How does engine oil react to having the additional fuel volume thru the motor? Oil gets contaminated in the best of situations I just wonder if the oil is compromised to a greater degree running this stuff.

vaticano

iTrader: (8)

I never had any trouble with the oil being contaminated.
But I also changed it every 2k miles.
I made the #'s in my sig on the stock short block. I only drive it on the weekends and made a few dozen passes at the track over a 2.5 year period.
If the oil went bad I'm sure I would have lost the motor.

JFM-jr

iTrader: (23)

Not really questioning if the oil went "bad" just wondering if contamination (wich happens no matter what) is accelerated at all. I am seriously considering doing a 30% blend this is a real bargain when compared to race fuel dollar for dollar nothing out there touches the stuff.

C5natie

iTrader: (1)

Hey guys, been a while. Ive kept tuning the with the e85 and have gotten some good track results. First of all, I had to learn to tune e85 with a o2 wideband...its the same as gas! I didnt know. Wether you use ethanol or gasoline, the wideband see it as the same stoich number. Therefore all you have to do is tune it for a good afr. I did find that under wot or load you'll get better results being slightly rich...at least in my car it did. This was good for a 3/10s and 2-3mph difference at the track. Last week the car ran a 7.28 @ 96.58mph..thats about a 11.35-38 1/4mi run compared to 7.5 @ 95mph before. Next will be a dyno pull, hopefully soon. This isnt my dd so gas mileage isnt hurting me. It went from 22mpg cruising on the hwy to about 19-20. Not too bad for a 30% e85 mix. still, since e85 is $2.65/gal its cheaper to fill up than 100% 91oct. So far so good.

darkvader0

Lol... Wideband sensor doesn't actually know what the AFR ratio is. It just reads a lambda value where 1.0 is stoich, < 1.0 is rich, and > 1.0 is lean. The wideband gauge then calculates the AFR from the lambda sensor reading and assumes you are using gasoline--which is perfectly fine. It says you are running 14.7 to cruise, but in actually you are truly at 9.6. Does make sense?

I have been running/tuning E85 for several years now on my car and a few others. Great stuff for boosted applications or high CR.

It seems people in this thread want to just haphazardly add in E85 to their stock tunes tho? This WILL lean out the mixture, which may be what some of you want and good to a certain point if stock tune is excessively rich. Beware tho! And of course the stock closed-loop system will correct things back to where it wants with short term/long term fuel trims.

pwrtrip75

iTrader: (8)

I went from 15 degrees of timing w/ gasoline and 15psi of boost to 25 degrees of timing and E85.... The car before would spin the slicks at like 40-50mph on the street.... now it does it at any speed... I like it Feels like it added 150hp at least.

SIG-054

Ive been using e85 in my car for a fair while now. With Petrol the best i could do was 12.4 @110 mph at the track, with it now tuned on e85 i managed a 12.0 @118. Went from 330rwhp to 401rwhp on the dyno through a large convertor.

Currently looking at upgrading my cam from a 228/230 to something like 236/242 and seeing how much power i can get then

nandos_z28

iTrader: (5)

Damn that's a large gain! Was the car tuned for the "petrol" as well, or was it untuned with gains to also be had just from the tune while on petrol?

SIG-054

it was tuned on petrol aswell, the gains impressed me thats for sure

C5natie

iTrader: (1)

Exactly. I didnt know that at the beginning, I hadnt really done tuning myself. The car is fully tuned for the mixture Im using. Since Im at 12:1cr the car really loves it. It took a few passes and some driving to really zero it in tho. Even on pretty warm days Ive gotten on the car hard and didnt see any knock retard and Im around 25* wot right now.