fuel rails

[hookdonspeed]

just need to make sure of this before i goto the yard this weekend...

the pre-00 and 00+ fuel rails are the same with injector size and all except the FPR correct? are the FPR's swappable?

[geldartb]

yep they are the same

FPR is the same physical shape just different PSI

[hookdonspeed]

injectors the same rating?

[geldartb]

the pre 00 injectors run on a psi of 43.5 flow 19lb/hr
the 00+ ones run at a psi of 55 flow 22 lb/hr

[hookdonspeed]

they are the same i checked part numbers, the difference in lb/hr must be made in the FPR

[SappySE107]

99 and older are multec 1 and 00+ are multec 2 so it can't be the same part number unless they give you an adapter for the electrical connector.

[hookdonspeed]

99 gam 3.4 fj93
02 impala 3.4 fj318
04 malibu 3.5 fj649
bah i did something wrong.,.. need more coffee

i wish the 3.5 and 3.4 injectors were the same plug :/

whats the 3500 injectors rated at?

[SappySE107]

24# from what I have heard, but they are shorter than the 3400 injectors.

[hookdonspeed]

i think im just going to get a aftermarket FPR and changeover the car to returnless rather then swap the fuelrail to return style, sounds like itll be easyer *Sigh*

[Superdave]

how is that easier?

Grab any 3x00 fuel rail, grab 6 injectors from a 3.4 DOHC (24lb/hr) and snag a FPR from a 99 or older 3x00 (43 PSI).

oh wait, aren't you using the whole OBD2 setup?

[hookdonspeed]

yea, full odb2, need to modify the fuel lines either way, i was thinking i can just use the 3line 99vette fuel filter/regulator setup (constant 55psi) they have, run 1 line to the injector rail and the feed/return to the filter. then i wont have to worry about changing the wiring, or clearance on UIM for the FPR