A/F ratios and Hi-Flo cats

[rottenronnie]

What kind of A/F numbers have you guys been getting during your pulls.

My last one was 10.3 which seems kind of rich.

I have got dyno time scheduled for Friday so I can determine if I need a reflash of the Stage 2 (DC) because of the B&B mid pipe (Hi-Flow cats) installation.
I have been told 13 is a good number. (I know 14.7 is best for economy).

Ron

 

[RedSrt007]

Supercharged, I tuned mine at 11.5-12.0

you can go a little leaner when N/a...

If your 10.3 n/a then yes, you are rich Putting the high flows will lean you up a little, which will acually help..

 

[Bone]

12.5 for non forced induction is a good target number.

 

[mmmmtorque]

I run 13.0 (+- .3) across the board.....have noticed that (at least when tuning my truck) that it likes it a little on the lean side. Now with power adders you should always run a little richer..


10.3...rich as hell

Get it closer to 13 and you will see some nice gains :rock:

 

[rottenronnie]

I run 13.0 (+- .3) across the board.....have noticed that (at least when tuning my truck) that it likes it a little on the lean side. Now with power adders you should always run a little richer..


10.3...rich as hell

Get it closer to 13 and you will see some nice gains :rock:

Thanks for all the answers. I will see where it is at on Friday.

So far (and since the last pulls) I have installed the Stage 2 flash, K&N drop-in and full (but without headers) B&B exhaust.:burnout:

Ron

 

[Bone]

My pistons and chambers looked good after 9K miles.
I ran:
12.5 non-forced induction
10.8-11.5 on NOS (harder to keep a perfect number)
If anything, it looked a little rich on my cyl heads. You can probably lean it out a little more than I did.
Yes, 10.3 is rich. You have some power hidden there!