ls7 afrs

[dian]

looking at the stock tune on a 07 z06 in power enrichment lambda goes as low as 0.75 and levels out to 0.78 on top. checking with the wideband, the engine does exactly that. why does the ls7 need so much fuel? this is deep into fi territory, i run around 0.77 @ 1 bar on the ls1. how much can this be leaned out and still be "safe"? i would like to do 12.6, but im scared, its 10% less fuel.

[joecar]

Post logs and tune.

What are your engine mods.

Check rail pressure.

[dian]

joe, the car is stock, untuned (yet).

[ProperTuningOG]

Its fine to change, its a non DI NA engine. Is there still cats on the car?

[dian]

everything stock. so can i go 12.6 on top and maybe 12.4 at torque peak?

[ProperTuningOG]

How is the car going to be used? Daily, cruising, racing?

[dian]

for fun and track (circuit) a few times a year. it would not be a problem to richen it up for the track. available gas is 95/98/100 ron. it has upgraded radiator.

[joecar]

Edit B3618 PE table, keep an eye on wideband AFR... if you're going to race, get some dyno time to see what AFR does at peak power and peak torque.

[Highlander]

Its that way to lower exhaust gas temperature and to make it live under the most grueling conditions. Aside from that, it is rated at 505 when it is clearly capable of a lot more. So it is track ready. Don't touch it. Leave it as it is and enjoy the car for what it was intended.

That being said.. There could be from 30-50whp on the cal alone.