Afraid I'm running lean on E85

[2011 gtcs]

Hey guys so I'm the middle of have my 14 GT500 tuned on E85 (tested E90). I've been looking at my Lambda during the WOT pull and I'm seeing anywhere from .80 to .86 from 2,500 to 6,200. If I'm converting it correctly that would be a AFR reading from 11.9 to 12.5, doesn't seem safe on a boosted car. I'd appreciate some insight.

 

[Weather Man]

Is the 12.5 a bump down low and the steady 12 the rest of the way?

Not apples to apples 4.6 to 5.8, but on Ignite 114 (E85 Race) Not a peep of knock on mine.

 

[2011 gtcs]

Is the 12.5 a bump down low and the steady 12 the rest of the way?

Not apples to apples 4.6 to 5.8, but on Ignite 114 (E85 Race) Not a peep of knock on mine.

View attachment 1615354

It will fluctuate around. 82 to .85 lambda. Maybe it's because I'm running E90 I'm seeing it a little lean.

 

[2011 gtcs]

Never mind, I spoke with me tuner and he made more sense of everything.

 

[biminiLX]

Never mind, I spoke with me tuner and he made more sense of everything.

Share for public knowledge?
I’m a huge E85 and like to hear from the tuners directly.
-J

 

[2011 gtcs]

Share for public knowledge?
I’m a huge E85 and like to hear from the tuners directly.
-J

When I'm watching my lambda during datalogging I'm usually seeing around .79 to .83 on E85 while on pump gas I'd see .76 to .78 tops. I felt like that was running to lean. But after talking with BJ he told me you don't have to run E85 as rich as pump gas and if I want to get close to my what A/Fs would be just do .80 ×14.08 which is 11.3, he said as long as its between .78 to .82 I should be good to go.

 

[biminiLX]

I agree. E85 is very detonation resistant.
-J