Running a little lean in boost

[GT40Mustang]

i have a supercharged mustang on speed density and when i go into boost my wideband reads 13.5..i would like to richin it up to atleast 12.5 or maybe even lower, i have stock 19lb injectors , if i put 24lb injectors would it make a difference?

 

[1BIGMOFO]

What else is done to the car? What size pump??

 

[BKD]

i would say yes and change to mass air......but :idk:

 

[GT40Mustang]

255lph pump, 12:1 fmu, stock fuel pressure regulator, 70mm tb ,ported upper and lower cobra intake with a 1" spacer, full exhaust, stock cam,

 

[RedFireCobra]

highly recommend you go to mass air and an adjustable fuel reg, then get a tune. should feel like a completely different car

 

[RedFireCobra]

oh yea and larger injectors, depending on what u'r boosting

 

[GT40Mustang]

im at 8 psi

 

[1BIGMOFO]

24's are great for your setup make sure Ýou get a AFPR and a tune and you will be in love with your car all over again..

Don't over do it before you upgrade fuel!! Lean = BOOM!!!

 

[RedFireCobra]

what supercharger are u running and do u plan on going with more boost? i would say u deff need a set of 24's for 8lbs of boost

 

[GT40Mustang]

i have a vortech v-1 kit , i dont plan on pushing it with to much boost, im pretty happy with 8 psi and how does speed density react with 24lbers? i dont want the car to start cutting out and stuff also sometimes when i go into boost i noticed that my boost gauge shakes back and forth between 5-8 it just kinda shakes, is this because of a bad connection?

 

[1BIGMOFO]

Could be, check it and make sure the ground is good

 

[363Coupe]

Ditch the fmu, get a good set of rails, and a standalone regulator with a set of 30's..... thats just me!

 

[RedFireCobra]

i would say that shaking sensation is detonation, VERY BAD. Did u put the kit on yourself or did some1 do it for you?

 

[GT40Mustang]

someone did it for me, what does the shaking mean?i have a boost retard at 2 right now, i want a stand alone but dont have the money but i am buying a adjustable fuel pressure regulator and 24#'s

 

[RedFireCobra]

I would say get ride of the fmu, get a good set of rails, and a standalone regulator with a set of 30's..... thats just me!

+1, if you got the money do this !

 

[RedFireCobra]

someone did it for me, what does the shaking mean?

does the whole car shake? does it feel like its misfiring or holding back

 

[BKD]

someone did it for me, what does the shaking mean?i have a boost retard at 2 right now, i want a stand alone but dont have the money but i am buying a adjustable fuel pressure regulator and 24#'s

timeing mybe..

 

[GT40Mustang]

no it's not the car at all, it's the boost gauge needle shaking

 

[BKD]

^yea..........bad ground or gauge its self..