Biggest injector for the 3.4

[3.4grapeofwrath]

Re: Biggest injector for the 3.4

I already have 19# installed. Been running them for a few years. You think they are enough for 8 PSI?




already installed. :tup:

I think you should be alright but I would check the air fuel ratio out with a wide band to be on the safe side.

[SpeedingFirebird]

Re: Biggest injector for the 3.4

I think you should be alright but I would check the air fuel ratio out with a wide band to be on the safe side.

I think you and I already had this conversation when I was talking about 6 psi. :burn:

I am working on installing the wideband now. Do you know if Accel sells an extender cable?

[3.4grapeofwrath]

Re: Biggest injector for the 3.4

I think you and I already had this conversation when I was talking about 6 psi. :burn:

I am working on installing the wideband now. Do you know if Accel sells an extender cable?

I ran 24lb injectors with the Vortech fmu with 15 lbs of boost but I had to modify my stock fuel pressure regulator to 18lbs of pressure at idle.
Cold starts were rich but once the o2's kicked in every thing was good.
I also used water/meth injection for extra fuel and to keep the motor safe.

[Forced_Firebird]

Re: Biggest injector for the 3.4

I'm surprised you ran it with 18psi. 24# inj, I was at 5psi and used a 8-1 Vortech FMU.

[3.4grapeofwrath]

Re: Biggest injector for the 3.4

I'm surprised you ran it with 18psi. 24# inj, I was at 5psi and used a 8-1 Vortech FMU.

18lbs was as low as I could get it. There was a restriction hole under the fuel pressure regulator on the fuel rail that prevented too much fuel to return to the gas tank. I did open the hole a little. How were you able to get the fuel pressure down to 5lbs?

[Forced_Firebird]

Re: Biggest injector for the 3.4

Gutted the stock regulator and used a cheap in-line on the return.