LX 90

What is the stock fuel preasure in a 90 5.0, and should it be adjusted at all??

FullAuto

38.5psi, not unless you mod it to the point you need more fuel.

LX 90

i have heads cam intake and 24 injectors

LX 90

??????

LX 90

bump

5.0stanger

I would just put it at 40-42 and run it. How are those heads working for you....you got the cheaper aluminum ones IIRC right?

1BIGMOFO

From my experience I would get an adjustable fuel pressure regulator and try it out. you deffinitley nbeed one. You can get a schrader valve fpr from summit for like $18.00 and you can get the autometer schrader valve adapter for like $8.00. I would try starting in the 41 range and see. You should know if your car is running rich or lean. try it out for a bit..

LX 90

The heads are working good. Im getting ready to get a 3000 stall and 4:10s. I just checked my fuel preasure and it stays at 35lbs or 40 with the vacume line off the regulator. When i rev up it goes to 34lbs with the vacume line on the regulator. it never looses preasure all the way to 6500 rpms

5.0stanger

Should be alright, but I would get an adjustable regulator.

LX 90

yeah i plan to get one along with a fuel preasure gauge