Cobb v103 93 Octane Log = Rich?

[iso100]

Thanks Braden for the reply! It's great to hear about all this technology in the EcoBoost.

 

[HaveBlue83]

Ok thank god.

There needs to be some kind of disclaimer or note in the box for us port inj guys so we dont freak out. anyone from 1920-2005 tuning era is going to be worried.

I guess i will go install stg 1 93 again. This will take an adjustment to get used to.

 

[iso100]

A huge thumbs up to Cobb for their customer support! I love how I have already had 3 tune updates in a month. Keep innovating!

 

[rodmoe]

Indeed Rep'd

 

[BostonDriver]

Just to be clear. Like iso100 said, the lower the number the richer the mixture; hence air/fuel ratio.
For Example:
15.0:1 = Lean
14.7:1 = Stoichiometric
13.0:1 = Rich

13.5:1 has always been the sweet spot... Even from my old DSM days.

 

[HaveBlue83]

i'm looking at a log via excel showing all the data. looks like (stock tune Stage 0) shows:

Stock A/F R:
14.0 @ 1800
13's up to 2500
high 12's from 2500-4300
12.5 from 4500-5200
low 12's from 5200-5800
High to mid 11's from 5800-6200 (I lifted after that)

Stock timing was:
10deg lowering down to 1 from 1800-2500
1-15deg slowly increasing to redline from 2500 on up.

so that's what ford wanted, that's the baseline. ok I'm outta here for now. Gonna install the 93 now that I know what OEM is

 

[HaveBlue83]

Anyone else notice the timing changes? Last nite i was at 15deg peak and npw i see 11deg peak. Is that all based off IATemps? Thats a lottt of pulled timing unless its commanding less for some reason.

 

[lessard.dcj]

Not sure but why do i see mine pull timing at times?
im on 91 tune 91 gas

 

[HaveBlue83]

i just made another thread so i dont keep cluttering this one up. I want to know why the timing is being pulled if there is no noticeable knock or issues.

http://www.fiestastforum.com/forum/...discussion-on-timing-iat-afr-and-other-things