what is your fuel pressure set at/w 24lb inj !

[89lxcoupe]

mods in sig what have you got your fuel pressure on ! thanks.....

 

[Topdowncruise]

39

 

[FastGT50Stang]

mods in sig what have you got your fuel pressure on ! thanks.....

mine is at 39psi too....

 

[bullitstang1313]

39 psi as well

 

[89lxcoupe]

well my kirban fpr wont let me adj it no lower than like 43 psi ? i can't figure it out and my pressure drops when i rev it !

 

[Sicarius428]

Fuel filter or Fuel pump not keeping up possibly?
Kevin

 

[bullitstang1313]

Have you checked your vacuum? If the pressure drops when you rev it, then maybe it is not seeing the change in vacuum during acceleration. Could be a defective regulator if it is not letting you lower the pressure though.

 

[89lxcoupe]

it has vaccum on it ! and it should loose it when i rev it because i have it hook to the vaccum tree !

 

[Sicarius428]

True. I have a kirban and I am able to go below 39.
Kevin

 

[89lxcoupe]

is 39 with or without the vac on it !

 

[1991vert]

is 39 with or without the vac on it !

without

 

[vristang]

it has vaccum on it ! and it should loose it when i rev it because i have it hook to the vaccum tree !

Ideally the fuel pressure regulator vac source would come directly from the intake manifold.

 

[gt90stang]

When I first put 24# injectors on mine 37# fp gave perfect Kamrfs with my Tweecer RT.

YMMV, Don

 

[89lxcoupe]

yeah i might un bolt the regulator and look at it !

 

[89lxcoupe]

well i found my problem, my return fuel line the chrome section that has quick disconnects was stopped up, i replaced it with another line and now i can adjust it anywhere i want it ! if you set it to 39 with the vac off what is your's showing with the vac on because mine is low say around 25 or so !