WHATSaGT?

i just installed a sts turbo kit on my 02 ws6 and i am having a problem running severely lean. anyone out there running a similar setup that has any opinions about a fmu set up, pump, injectors, or adjustable fuel regulator? i am going to upgrade the entire system anyone had good luck with any specific brands or sizes?

2002ws-6

iTrader: (5)

Ive got the same car same set up at 7#. I went to california speedway and ran a few runs with the wideband commander recording it. I had to let off the gas around 4500-4800 rpm the motor didn't sound happy. Checking the Air ratio after the first run had 11.5:1 all the way till about 4500 rpm then leaned out to 13:1 buy 5500. so the stock fuel system can only deliver enough for 5# and 4500 rpm +-. I only did one more run after turning down the boost to 2#. I'm going with 42lb svo (48.3 at 58 psi) and the racetronix fuel pump set up. Then a new custom tune with HPT

WHATSaGT?

thanks alotfor the advice. did you change your stock fuel pressure regulator?

Public

iTrader: (19)

I did not change the stock regulator. 60lb injectors and Racetronix pump setup. Stock pump sucks and dont forget to have a fresh filter put on it when done.

longrange4u

iTrader: (2)

Yea I have 42# and a Walbro 255... programmed by Fastech to stay around 11.5:1

EPP

iTrader: (22)

No one should ever run any type of forced induction without the supporting hardware. It only takes one wide open throttle run to break the number seven piston in one of these LS based engines, if the air/fuel ratio is too lean. It is not always the fault of the consumer, as many companies produce forced induction kits with low boost, and state that further upgrades are not needed.
I recommend a Walbro 225 litre in tank fuel pump, we use the Holley/Walbro pn# 12-914 "forced induction" in tank pump. Ford SVO 42# fuel injectors, and a good dyno tune to get the air/fuel and timing dialed in. Bob