E85 or 100 octane

F

FracaSHO

New member
Which is better:

1) getting a 100 octane tune for the track, or

2) E85 tune and use it daily?

Current mods: check sig

Future mods: PPE catted DP's, cat back exhaust, Eco power hot pipes, maybe NOS.

Thanks.



Brad
2010 SHO with PP
170* T-Stat
NGK LTR7IX plugs, gap at 0.030
BOV VTA
MyCal LMS Stage 4+
Sent from my iPhone
 
FracaSHO said:
Which is better:

1) getting a 100 octane tune for the track, or

2) E85 tune and use it daily?

Current mods: check sig

Future mods: PPE catted DP's, cat back exhaust, Eco power hot pipes, maybe NOS.

Thanks.



Brad
2010 SHO with PP
170* T-Stat
NGK LTR7IX plugs, gap at 0.030
BOV VTA
MyCal LMS Stage 4+
Sent from my iPhone
Click to expand...

Brad, I don't think anyone is running 100% e85 without a piggy back fuel system.  Bambic got it to work.  So I would say the 100 octane tune would be the easiest and cheapest way to go.  You would obviously need to log or get a dyno tune for it.
 
FoMoCoSHO is blending his own with E85, for an effective E25 currently, I believe, as a daily driver.  Running straight E85 is not currently possible AFAIK without fuel system upgrades (as mentioned above).  So if 100 octane is easy to get, run than with a tune for 100 octane.
 
SHOdded said:
FoMoCoSHO is blending his own with E85, for an effective E25 currently, I believe, as a daily driver.  Running straight E85 is not currently possible AFAIK without fuel system upgrades (as mentioned above).  So if 100 octane is easy to get, run than with a tune for 100 octane.
Click to expand...
True but FracaSHO has a 2010 so blends are a no go.
Older 3.5 EB fuel delivery system can't handle it only 13+ can do blends.
I'm experimenting as well with it a little more conservatively though.

Also LMS will not tune for E85 blends .
 
At 34 percent I was still seeing 2400+ at the rail so I think I had plenty of FRP, I was concerned about exceeding 25 percent on the trims and the ecm ratting me out to the d-ship.

I recently saw a pic of a Torrie tuned car that had plenty of frp in Torque. That leads me to believe there might be room to play a bit of e85 in gen 4.1 but I wouldn't attempt it without logging and tuner support.

 
Sounds like E85 is more complicated than a simple tune. There's a Delta Sonic about 5 miles from me that sells race gas. I think they have 100 and/or 104 unleaded. I'll have LMS send me a race gas tune and whenever I'm gonna go to the track, I'll fill up my almost empty tank with the race fuel, load my tune, let the car relearn its idle trim, and go to the track.

Done!


Brad
2010 SHO with PP
170* T-Stat
NGK LTR7IX plugs, gap at 0.030
BOV VTA
MyCal LMS Stage 4+
Sent from my iPhone
 
FracaSHO said:
Sounds like E85 is more complicated than a simple tune. There's a Delta Sonic about 5 miles from me that sells race gas. I think they have 100 and/or 104 unleaded. I'll have LMS send me a race gas tune and whenever I'm gonna go to the track, I'll fill up my almost empty tank with the race fuel, load my tune, let the car relearn its idle trim, and go to the track.

Done!


Brad
2010 SHO with PP
170* T-Stat
NGK LTR7IX plugs, gap at 0.030
BOV VTA
MyCal LMS Stage 4+
Sent from my iPhone
Click to expand...
Don't fill up, that weight will slow you down.

E-85 isn't really an option for you as Livernois won't tune for it.

To be quite honest if I didn't have E-85 readily available I wouldn't be screwing with it either.

The biggest complication is going to two gas stations when I fillup.

Not a big deal as I'm blessed with lots of good fuel in my sphere of existence.





 
FoMoCoSHO said:
FracaSHO said:
Sounds like E85 is more complicated than a simple tune. There's a Delta Sonic about 5 miles from me that sells race gas. I think they have 100 and/or 104 unleaded. I'll have LMS send me a race gas tune and whenever I'm gonna go to the track, I'll fill up my almost empty tank with the race fuel, load my tune, let the car relearn its idle trim, and go to the track.

Done!


Brad
2010 SHO with PP
170* T-Stat
NGK LTR7IX plugs, gap at 0.030
BOV VTA
MyCal LMS Stage 4+
Sent from my iPhone
Click to expand...
Don't fill up, that weight will slow you down.

E-85 isn't really an option for you as Livernois won't tune for it.

To be quite honest if I didn't have E-85 readily available I wouldn't be screwing with it either.

The biggest complication is going to two gas stations when I fillup.

Not a big deal as I'm blessed with lots of good fuel in my sphere of existence.
Click to expand...

I hear you about the full tank. However. I am 65 miles from union grove drag strip and I would drive around to let the car relearn the idle trim after loading the race fuel tune. So realistically I would get it down to a little under half a tank, which would leave me with  1/4 tank or less by the time I get to the track.


Brad
2010 SHO with PP
170* T-Stat
NGK LTR7IX plugs, gap at 0.030
BOV VTA
MyCal LMS Stage 4+
Sent from my iPhone
 
You can't run E85 with stock fuel system above a 30% E85/gasoline  (E30) mix, 100 octane is the ONLY option you have for high HP tune on fuel.
 
So blend or mix 25% E85 with 75% 93 oct? What's total fuel capacity of a 2013 SHO.... Or how many gallons of e85 is recommended
 
Boggus said:
So blend or mix 25% E85 with 75% 93 oct? What's total fuel capacity of a 2013 SHO.... Or how many gallons of e85 is recommended
Click to expand...
The total fuel capacity is 19 gallons.

I use this calculator. That and the torque app on my phone to find what my fuel level is.

http://intercepteft.com/calc.html
 
4DRHTRD said:
You can't run E85 with stock fuel system above a 30% E85/gasoline  (E30) mix, 100 octane is the ONLY option you have for high HP tune on fuel.
Click to expand...
I goofed one tank and was almost 35 percent. Throttle response was garbage for a day or so and frp dropped down to 2300 ish but other than that,  didn't notice the car having any issues. 
 
FoMoCoSHO said:
4DRHTRD said:
You can't run E85 with stock fuel system above a 30% E85/gasoline  (E30) mix, 100 octane is the ONLY option you have for high HP tune on fuel.
Click to expand...
I goofed one tank and was almost 35 percent. Throttle response was garbage for a day or so and frp dropped down to 2300 ish but other than that,  didn't notice the car having any issues. 
Click to expand...

Right now i have 8.55 gallons of 91, 6 gallons of e30, and 2.10 gallons of e85 in the tank... Since the e30 mix uses a base of 87 i know right now my octane level is lower than when i will do a e85/91 mix. Just how it had to be done at the time, right now it should be at 25%. I did a data log and my FRP dropped to 2300 at low rpm/high boost. I get wheel spin at 1-2 2-3 now though... its a night and day difference from what i was running.
 
You could always install a Flex Fuel sensor and gauge so you can keep an eye on what you're running. They're not cheap but would be great for experimentation. Maybe Aeroforce could build in a 0-5V E content into their gauges using the cheap GM sensor. That would be an awesome option.
 
So 4.5 gallons of E85 to fill the tank of 93 Oct would be the mix that is safe to run.  What does that bump the octane to and is it effective?
 
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