leesaleen

just dyno'ed my 06 na s281 3v yesterday and running 13.5:1 air/fuel ration, anybody else running this lean?

02Extreme21

My 02 E is the other way....10.5 which isn't good either I understand.

Birdieman4

Realize that the A/F ratio will be more arrgressive for n/a cars vs blown cars. Your n/a A/F ratio is about right. What octane gas do you run?

sowaxeman

My dyno slip is at home, but as I recall I was also in the mid 13.5 range.

leesaleen

i using 93 octane but tune is for 91...

S281 E

What is the right number for a blown car?

leesaleen

by the way... car dyno'ed at 284hp and 302lbs. only mods are K&N CAI and Ford Racing X pipe. was expecting a little more, around 300.

Birdieman4

For you, I'd ideally like to see about 11.8 under full load at rpm.

sowaxeman

Mine was 298hp and I THINK 310 or 315 lbs - with Steeda CAI w/Steeda Tune via the Diablo Predetor & Pypes o/r H

tmiles

Kinda going to hi-jack this thread a little so sorry in advance. I'm taking mine in tomorrow morning to get the break in oil changed to Royal Purple and were putting it on the dyno to see where it is factory with no mods. Any advice on what I should look for or that I should hear from the techs if they recommend anything? 06-S281SC