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I installed a innovate gauge in my Camaro when I initially thought I could run E but never took out. I believe it reads the content. I need to check it out later today. What a great topic.
Five gallons is good initially but subsequent fill ups will require a different amount of e85 to maintain the correct percentage since you will already have e30 in the tank. There are handy e85 blending phone apps that figure this out.
Specific app ? Just installed the UniE85 Manager
Last edited by 123sugey; Dec 13, 2023 at 04:20 PM.
I use the Hampton Tuning iPhone app which has a nominal fee. I see there is now another one that is free that appears to do the same thing. Search for e85 calculator.
These calculators use current fuel level % to determine the correct amounts of fuel. As I mentioned above when I use the fuel level % in the My Chevrolet app it overestimates how much fuel I actually have. At least it overestimates how much fuel the car will accept. When I refuel I add the e85 first so it will splash mix when I add the e10. If I go by what the My Chev app tells me I end up with about a gallon less e10 which puts my ethanol percentage greater than 30%. Therefore, rather than trying to fill the tank to the brim I add 5% to My Chev fuel % and go from there. It is actually quite simple so don't think that this makes gassing up some complicated process.
This is the gauge I have. I just started the cart and as you can see the "alcohol pct" is 0. I dont have any sensors with the gauge just connected to the ODB2. I assume even 91 has at least some alcohol. I mean its shitty CA gas but should at least read something. Interceptor OBD2 Single Gauge Chevrolet Camaro 2010+ – AeroForce Technology, Inc.
You need an alcohol sensor to read ethanol %. Rest assured ALL gasoline in CA is at least e10. It will say so on the pump. The exact percentage is not critical. The ECU is able to adapt to varying amounts of ethanol. The 30% discussed here is reasonable and optimal on a stock tune.
I am about 99% sure I will be good with the $99 sensor they sell for the gauge. I actually already have the Lethal Garage Flex kit installed when I thought it was that simple. Another project for another day lol
So I jumped in the Camaro yesterday and she was on E. I had some errands to run so I did so and she was getting low low fast. It got to a point it said I have about 20 miles left. I know that would go fast in town. With the Maggie and custom tune that car gets the absolute worst gas mileage ever. I mean around 12-14 mpg combined. If I cruise on the freeway its low 20's but damn I think that maggie loves fuel. Anyways I pulled into the station next to the house and started out with 5 gal of E85, I then filled the rest of the tank which was about 11.2 gal. Its a 19 gal tanks so that means I have 5gal of E85 and 14 of 91. I need to go to work tomorrow which is about 90 miles both ways and in lovely California traffic so even the C8 doesnt do so well. I am going to fill up before I go and do the same thing. 5gal of E and rest of 91. I am going to DL these apps and see which one is easiest to use. I want a base then I can work from there. I usually get gas at the same place. It is by far the cheapest in the area.
No. I asked if anyone had looked at fuel pump pressure, injector pulse width, and duty cycle on E30. BJ67 replied that a stock LT1 could run E85 and assumed the LT2 could do the same and therefore E30 should be fine. I argue that's a big assumption.
allblackeverthing posted that Vengeance Racing told him a baby cam for fueling and injectors is needed to run E85 on a LT2. This leads me to believe that maybe the LT2 can't safely run full E85 without some modification to the fuel system.
Regardless of what's needed to run full E85, all I wanted to know was if the C8 fuel system can safely keep up with E30 and there's data to confirm that besides just fuel trims.
Jannetty Racing dyno tuned my 2021 LT1 Camaro with a LT2 intake manifold only mod on E70 (pump E85), he monitors all the important fueling factors and requirements. He said the stock 2021 Camaro had no problems in any of the fueling requirements with the E70 and he even wanted to add race E85 to bring it up closer to E80, but I told him no reason to to do that. So I assume a stock LT2 corvette could be tuned on pump E85 also without issue.
When I had my 2020 Supra I had a choice between e50 and e85 tunes. According to the tuner, Visconti, the e50 tune actually made more power because he could make the tune more aggressive without worrying about maxing out the fuel system. e85 required so much more fuel volume that there was little spare fuel pump capacity. Also, with a normal street car, e50 provides 90+% of the benefit of e85.
When I had my 2020 Supra I had a choice between e50 and e85 tunes. According to the tuner, Visconti, the e50 tune actually made more power because he could make the tune more aggressive without worrying about maxing out the fuel system. e85 required so much more fuel volume that there was little spare fuel pump capacity. Also, with a normal street car, e50 provides 90+% of the benefit of e85.
I hear ya, Jannetty said my fuel pressure and volumn was in a very safe range and there is room for a few mods like headers without any mods to the fuel system.
Welp Souza's girl don't like that CA E85. Heres my experience.
I started with an almost empty tank add 5 gal of E85, rest 91 oct
Drove about 50 or 70 miles before I got a CEL. I did check but assume it was a lean code "P171"
During the tank it went away.
My typical 330 miles went down to 270 or so with same normal driving MPG went from 23ish to 17ish
Filled up again with same mix. I realize it would now be a little different since last few gallons in tank are mixed already but F it. LOL
Check engine comes back and has been present since and is a lean system code.
I am going to fill up again in the next few days and go down to 4G of E85 and see if that helps
Heres my experiece. Car doesnt seem any faster. Besides the break at the pump I am not seeing gains with my "butt dyno".
Current mods K&N intake system, Ported TB (95mm), matching ported LT2 manifold, MRBP catback. I am not spraying the car just yet.
Welp Souza's girl don't like that CA E85. Heres my experience.
I started with an almost empty tank add 5 gal of E85, rest 91 oct
Drove about 50 or 70 miles before I got a CEL. I did check but assume it was a lean code "P171"
During the tank it went away.
My typical 330 miles went down to 270 or so with same normal driving MPG went from 23ish to 17ish
Filled up again with same mix. I realize it would now be a little different since last few gallons in tank are mixed already but F it. LOL
Check engine comes back and has been present since and is a lean system code.
I am going to fill up again in the next few days and go down to 4G of E85 and see if that helps
Heres my experiece. Car doesnt seem any faster. Besides the break at the pump I am not seeing gains with my "butt dyno".
Current mods K&N intake system, Ported TB (95mm), matching ported LT2 manifold, MRBP catback. I am not spraying the car just yet.
Get a dragy 😃
Nice that you are trying the 5 gallon method I’m going to try it with my Z
