OLSD, CLSD. I've run the car in both in the past. Right now I'm in OLSD but I think I should change. I believe it causes inconsistancys from day to day. Like for instance at the track a/f on one day may be different than than another.

Any info will be greatly appriciated.

 

stock 02's shouldnt have much of an effect at WOT since you'd be in open loop either way at that point.

 

I would stay in CLSD, that way you have fuel trimming activated to make up for slight variances. When ypou go WOT you are in open loop PE anyway and fuel is delived straight off the VE table and your PE mulplier.

Open loop does have its advantages though such as the ability to give your car a nice lean idle and to lean it out when at a cruise, both of which will help with gas mileage.

 

Im going to try running it back in CLSD and see what out come it has.