Lean cruise settings for 66 Nova with an 04 GTO motor wth M6

[LS1chevy2]

Is this enabled on the 04 GTO OS
So if I manipulate these tables will the car accept them, and go into lean cruise.
I've read conflicting threads some say it works on the stock 04 gto, some say a holden OS file must be downloaded.

http://ls1gto.com/forums/attachment....9&d=1189043702

I went with these settings but slightly reduced for the first run.

This is in a classic car with no emission requirements.

[LS1chevy2]

Well it works and here is my scan

You have to be real steady with your foot the faster you go or the narrow bands will start to dance again.

Around 50-65 it's easy to stay in Lean cruise mode but if you go faster any slight acceleration will pull you out.

This really helps out the fuel savings with my brick like aerodynamics.

3-5 mpg? i'm guessing?

[TreyZ28]

I'd run lean cruise at everything below ~60% load. It's fine.
If I was tuning it, I wouldn't even want a wideband. Just lean it out till it stumbles and then rich it up a touch. Do this across the board.

You dont want to be JUST lean of 14.68 (like 15.5 rangish?) because that is the "lean best torque" (read: hot).

[LS1chevy2]

if you look at the scan the O2's are reading 30-40mv that seems lean enough.
without a wideband I have no real way knowing how lean I am.

but it runs great it actually runs more quiet. I can actually hear the difference when the lean cruise kick's it's slight but noticable.

I didn't tune it till it stumbled so there might be more room to improve on but the 10-8 more degrees of timing and that has to be worth atleast 3 mpg

I didn't notice any difference in drivability it drives smooth as ever.

Also it might be a brick in the aerodynamics but it only weighs 3000lbs

I'm going to have use that MPG formula to see my gains(does it work)?

[Super73]

MPG works for me in my 63 P/U using a F-body PCM. For some reason I think the 6.0's don't have a key ingrediant (at least my wifes TBSS doesn't). I hear you on the brick thing.. Although if yours is a brick, mine must be a cynderblock filled with lead I only see 8-9mpg at 70 on the freeway

[LS1chevy2]

I'm trying to create the MPG PID but can't seem to figure it out.