I just put in a fuel pressure regulator on my itr and was wondering what the stock fuel pressure is. Mine is at 50 psi right now and just wanted to check if that is stock or not.

 

With the vacume hose connected it could be anwhere from 38 to 44 psi - stock.
This is from the stock regulator.
You would have to Dyno the car to see if they are any
gains from increasing the fuel pressure.
Without boltons your effort would be in Vein.

Mine was at 40 psi stock, its now at 46 psi with I/H/E
and 2 1/2 piping from the cat to the back pan.

Is the 50 PSi with the vacume hose on or off, if its 50 psi with it on,
then its definately too high?

Hope this helps,

4DoortypeR

[Modified by 4doortypeR, 7:00 PM 8/30/2001]


[Modified by 4doortypeR, 7:04 PM 8/30/2001]

 

My friends ITR has JDM DC 4-1, AEM CAI, custom CAT, DC 2.5" RACE exhaust and AEM rail/reg. With the hose off and pluged, he has it set at 54psi and when the hose is on it is 44psi. He has been running like this for about 3 months and there are no problems, but it will change when we hit the dyno in 2-3 weeks.


[Modified by 1QWKGS, 12:28 AM 8/31/2001]