A/F numbers

[JessesTalon]

ok my apexi turbo timer has a A/F n' o2 ability

My Question is from what number to what number is lean, stoich, rich

so i checked into it and havent found anything

but i think its 0-12 is lean 12.1 to 14.9 is stoich and 15 and up is rich?

is that right anyone know the EXACT number's?

 

[NewB2dsm]

If its works like a wideband 0-10 is rich 11-12 is where you want to be. higher is lean

 

[kpt4321]

It's not that simple.

Cruise will be around 15:1.

Stock WOT is 9.5:1.

Well tuned on race gas at WOT can be anywhere around 10:1 to 12:1, and possiby leaner.

Edit: Since it uses the stock O2 sensor, the numbers are useless anyway.

 

[NewB2dsm]

Originally posted by kpt4321
It's not that simple.

Cruise will be around 15:1.

Stock WOT is 9.5:1.

Well tuned on race gas at WOT can be anywhere around 10:1 to 12:1, and possiby leaner.

Edit: Since it uses the stock O2 sensor, the numbers are useless anyway.

i know its not that simple but he had it backwards. So what i was saying is that the lower the number the richer it is.

 

[JessesTalon]

Originally posted by NewB2dsm
i know its not that simple but he had it backwards. So what i was saying is that the lower the number the richer it is.

ahh ok ok I get it now

about 5 different pulls in 2nd 3rd and 4th were at 12.1 today, glad without tuning or anything im in the good numbers

 

[kpt4321]

Originally posted by JessesTalon
about 5 different pulls in 2nd 3rd and 4th were at 12.1 today, glad without tuning or anything im in the good numbers

Arrrgh.

1. If you're on pump gas, 12.1:1 is way lean.

2. If it uses the stock O2 sensor, which it does, it's inaccurate as hell.

3. If it uses the stock O2 sensor, which it does, the readings will move around with temperature.