ls1 fuel rail's. return, returnelss, which vehicles? Injector flow??

[busta9876]

Okay, my understanding was that the 97,98 corvette ls1 has a fuel rail mounted regulator with a vacuum reference. Is this correct or not? All the 97/98 corvette files I get from the repository show the flow changing with vacuum.

All F-body had single fuel rail connection, with regulator in tank. right?

[Reucroft]

If you're looking at injector flow versus vacuum then all years vary - it's just physics. Increased vacuum helps suck the fuel into the cylinder, so you get a greater flow. At zero vacuum (WOT) the pressure will drop.

The 1999 onwards had a single fuel line with no return, the 97/98 had a return line, it's the first difference you spot between the years when opening the hood.

[Russ K]

The 97-98 Corvette pressure regulator is not referenced to vacuum, so the IFR graph will slope up. The Camaro/Firebird pressure regulator is part of the fuel pump unit, the IFR graph will also slope up.

Russ Kemp

[busta9876]

The 97-98 Corvette pressure regulator is not referenced to vacuum, so the IFR graph will slope up. The Camaro/Firebird pressure regulator is part of the fuel pump unit, the IFR graph will also slope up.

Russ Kemp

thanks, just the info I was needing. I was trying to find a picture to see if there was a vacuum reference, I figured so after about 10 corvette calibrations I opened all had a slope.

97-98 had nearly same injectors as the 01+. 99-00 had somewhat smaller injectors if memory serves me right.

[detroit]

so How would I set up my IFR if I am using the corvette Fuel Pressure Regulator/filter and 42' marine injectors?
thx

[69lt1bird]

It will be sloped.