so im running a 11,9 -12.2 afr now, would it be worth it to up it to say 12.5 or so, what kinda hp gain would i get? anything at all or just a few or what?

 

Yea I Would lean it out a touch, most tuners run about a 12.8 AFR

 

.88 seems to work the best for me if u use hpt

 

are you talking WOT or crusing? crusing run a 14.7 at wot you should be runing 11.6 - 12.3:1 anything higher then 12.3 is not good. on a naturally aspirated engine 1.8 would be fine but on a turbo or supercharged engine its not good. Run a 11.7 and call it good.

 

Its okay for them to run that lean with their LNF's.

 

Why would that be? Everything I have read says 11.7 on a turbo or supercharged car.

 

gm tune runes like 13afr on 22psi on the lnf. stock on 16 psi is about the same+

 

Direct injected fuel. .88 PE lambda is golden.

 

http://en.wikipedia.org/wiki/Gasoline_direct_injection

 

so any idea how much power id gain by going from 12.2 to 12.5 or 12.8

 

you want it at .88 PE lambda i can tell the difference from running 12.5 to 12.8. 12.8 in my opinion is the best

 

guess about how much difference there is

 

i would say 5whp maybe 10. it made a noticable diff for me. what did you get sir?

 

i dont know, i havent done it yet, gonna email vince right now to up it.

thats interesting, Vince wont tune to 12.8 a/f ratio.

 

my ss/sc runs the best in 11.0-11.5 range. right now im in high altitude and im running 12 and it ******* blows

 

wow i wonder why he wont

 

he said it reduces power and there is more wear and tear on the engine.