o2 and safc ?

[Dfish1]

So the previous owner of my car said he likes to run the car a little rich, a .92 o2 reading.
I have two questions:
1. would I gain anything by leaning it out to .90 (the standard I beleive)?
2. I have a .92 on low boost(17psi) but I was getting .95-.96 on high boost(19-20psi), shouldn't it run a little leaner with more air? what to do?
thanks,
david
btw, 97gsx with 16g, safc and the supporting mods.

 

[CanadianTSi]

.90 on a 2g is getting pretty lean, if you like to realy on narrowband readings....

 

[turbolarry]

From RRE;
2G 95-99 Turbo

On 91 octane gas you will want .94-.95v If you are at a higher altitude then lower voltage is OK.
On 92 octane gas you will want .94v
On 93-94 octane gas you can get away with .92v

David, do you have a datalogging device?
Did the previous owner say how it was tuned?

 

[kyle h.]

lean it out till you see knock, then richen it up agian. dont rely on your o2 sensor for anything, just get used to how it reads, and then u can make quick judgements with it.

use timing and knock, on a 2g i guess just use timing, but u can see knock in the timing.