E85 LS3 Target Lambda - NA / Nitrous

[bgreen]

Hey guys, finally got my C6 setup on flex fuel.

Right now I am running between .83 and .86 Lambda at WOT, N/A.

I have been reading a ton on other forums about what people are running as a target WOT lambda for both N/A and Nitrous with varrying info.

I am coming up with .84 at peak torque (~4400rpm) and .87 at peak HP (~5200rpm) running N/A.

I am then seeing run between .77 and .85 on the bottle.

I know it's hard to say without a dyno, but curious what you guys recommend. This is just a bolt on LS3. Looking to run a 150 shot with standalone c16 tank.

Would love to get my tune dialed.

Thanks!

[Ben Charles]

Numbers looks close! I always run Nitrous little fatter

[bgreen]

Numbers looks close! I always run Nitrous little fatter

Appreciate that. Think running around .82 will suffice for both NA and spray? I know it's not ideal but would like one base tune for both.

[Ben Charles]

Appreciate that. Think running around .82 will suffice for both NA and spray? I know it's not ideal but would like one base tune for both.

Don’t do that...
Setup motor tune for .84-.85 and then on spray dial it in to around .78 lambda (use same tune, nitrous I assume is wet kit and naturally comes from fuel pump)

As far as timing that’s what you have to change.. depending on if you want to run higher octane when spraying may not pull any timing

[bgreen]

Gotcha, this is my first nitrous setup. I can get it to .78 with the jetting then if I understand correctly.

It will be a standalone setup with C16 in the standalone. E85 in the car.

[Ben Charles]

Lambda doesn’t care what the fuel is, so target those numbers!!

Yes nitrous jetting to get the fuel you want don’t change fueling in tune for nitrous that will skew your NA numbers

[bgreen]

The C16 point was more for the retard required. This will be retarded by an IAT relay. Hoping to squeeze a little timing by running c16 in the standalone and not ruin my fuel pressure on stock pump with ethanol and spraying off the rails.

Appreciate the help!

[bgreen]

Just tested .86 and I am getting 4* more of knock at 5000rpm than I was with .82 -.83 at the top end.

Also hot as hell out in Vegas today. Putting everything back down to .83 .82 area, seems to like that a little better.