wondering what kind of numbers i am looking for out of my car. i want to know if it is "safe". idling and crusing below 3 thousand i am at 14 and it stays there most of teh time. but when you give it WOT or at least 3/4 it will drop to 12 or low 13 and stay there when you run it.
so tell me what you think.

Thanks

 

mods are in the signature.

 

I always get confused thinking about A/F numbers but I am pretty sure 14 is pretty lean but I guess if it is not in boost at those levels then it is probably fine. The 12-13 sounds ok for under boost. I don't know a whole lot about it though.

 

thanks more please!

 

That sounds pretty much dead on, though I'd be a tad bit nervous if it starts to sneak any higher than a low 13 in boost. 14-15 while cruising is fine.

 

well i just installed an inovative wide band o2 in my FB with 13BTII, its street ported, but stock turbo, no tps as its wonky, all sensors are a mess lol, any ways for the most part out of boost il get around 13.8-14 ish if im in 5th gear and doing 60Km il get 14-14.7 up to 15 if its a small decel then back on gas, on the highway at 112KM/h i get the same 13.8-14 113 and up it goes down to 12-13. on hard decel i have seen 21's
i had Aaron cake in my car this Friday doing some drag run and for the most part he was happy with the ARF's but on woot at 6K he was saying that the 12.5-13 where not making him feel good lol so that must be bad
but ya i cant say if its good or bad number but its what i get. from what i can see we seam to have the same #'s tho. who know. im sure Aaroncake will jump in and explain some more

 

12:1 is good for low boost and makes the turbo very responsive. I generally tune for 12:1 until about 4-5 PSI. After that I recommend running 11.5 until boost in the mid to high teens, then dropping into the high 10s or 11 even.

13:1 under boost is way too lean.

14:1 under light load is acceptable for open loop operation. Closed loop should correct that to around 14.7 (and it will bounce around a little).