I wanted to get your opinion on this topic, ive searched and i know most would tell me to purchase larger injectors, but i think the stock injectors would work with the 9lb pulley. I am running the fmu from the procharger kit. The fmu controls an inline fuel pump that was supplied by ati. Well i had replaced that inline pump for an inline walbro. My car was basically in the 9's a/f with the 7lber. How much of a difference would the a/f become if i added the 9lber? Ive heard from 2 guys, thats 2lbs of boost would lean the car out by 1pt, which isnt much. So it seems to me that if thats the case, i would have enough fuel for the 9lber. Does this sound right?

 

Not sure on the pro-charger but on the Vortech I am running the 9lb pulley with stock injectors and no problems whatsoever. I am putting right at 400 to the wheels and she is handling it well.

 

what are ur a/f's?

 

didnt work for me

 

What about it didnt work ? Did you have the 6 to1 FMU ? or the 8 to1 FMU ? Im not sure when [ what year ] but Vortech changed the FMU from a 8 to1 to a 6 to1 . Or if you try to flash the ECU to control the fuel...that wil not work either .

 

at the time I still had the stock injectors installed.

The injectors just couldn't supply enough fuel?
---OR---
The aux+stock fuel pumps couldn't supply enough fuel?

The car would shut down in 3rd gear wot at @ 5000rpm's.

Thats when I decided to build & go TT

 

My a/f's are strong from 13.5 - 11.3

 

Isn't 11.3 a little high at redline? Mine is closer to 10-10.5 at 6k to 7k.

 

I would have to say you had something else going on . At 5000rpm's you shouldnt have been running out of fuel .