ls9

[mikels]

Originally Posted by camcojb

Cool setup. Cons are cost, and the fuel system needed to run it. It does not use a standard 58 psi LS setup, think it's close to 100 psi under boost with a specific pump controller and pump setup.

You may be able to run it with an aftermarket ECU and aftermarket injectors and pump/regulator; I have not researched that. But the factory fuel system is very expensive.

You can run an LS9 with conventional fixed fuel presssure but will need larger injectors (production injectors are not large enough without 600 kPa fuel pressure that FSCM (Fuel System Control Module) commands when under higher load).

LS9 production fuel system is expensive, but very trick and works very well (3-phase DC fuel pump with variable pressure delivery based on ECM requested pressure). Fuel delivery for any high bandwidth engine will always be difficult (and expensive) to do correctly.

Can run with E67 production controller as well with fixed pressure.

[camcojb]

Originally Posted by mikels

You can run an LS9 with conventional fixed fuel presssure but will need larger injectors (production injectors are not large enough without 600 kPa fuel pressure that FSCM (Fuel System Control Module) commands when under higher load).

LS9 production fuel system is expensive, but very trick and works very well (3-phase DC fuel pump with variable pressure delivery based on ECM requested pressure). Fuel delivery for any high bandwidth engine will always be difficult (and expensive) to do correctly.

Can run with E67 production controller as well with fixed pressure.

thanks for the info Dave! For those that don't know, Dave knows more about the LS9 tuning than anyone I know of, so if he says it can be done, it can.

[Stielow]

Originally Posted by mikels

You can run an LS9 with conventional fixed fuel presssure but will need larger injectors (production injectors are not large enough without 600 kPa fuel pressure that FSCM (Fuel System Control Module) commands when under higher load).

LS9 production fuel system is expensive, but very trick and works very well (3-phase DC fuel pump with variable pressure delivery based on ECM requested pressure). Fuel delivery for any high bandwidth engine will always be difficult (and expensive) to do correctly.

Can run with E67 production controller as well with fixed pressure.

We set up Red Devil with larger flow injectors and it works great!

Stielow

[clill]

The LS9 is expensive but it is the best engine I have owned. Smooth trouble free power. First old car I have had that I don't need to look at the gauges. It just runs.

[clill]

And in the above pic where Stielow is drifting, I would be doing a doughnut.

[morris69]

@clill is that with nods and what tranny and gears are u running.

[camcojb]

Originally Posted by morris69

@clill is that with nods and what tranny and gears are u running.

Morris,

I believe the motor is stock with headers and custom tune. He just bumped the boost a couple pounds or so with a re-tune from Dave Mikels. Car has a T56 6 speed and (I believe) 3.70 gears. It ran very well at stock boost (I got to drive it) but Charley said it's noticeably better and faster with the pulley swap and re-tune.

[parsonsj]

Very interesting discussion. Can any of you veterans disclose the particulars? What kind of pump, what pressures? What size injectors?

I've got a couple CTS-V pumps around... would that work?

[Amituk]

defo going to run a LS9 in nighthawk!!

Gonna be even harder here in the UK with lack of knowledge but nothing about my project is going to be easy!

[youthpastor]

Originally Posted by mikels

You can run an LS9 with conventional fixed fuel presssure but will need larger injectors (production injectors are not large enough without 600 kPa fuel pressure that FSCM (Fuel System Control Module) commands when under higher load).

LS9 production fuel system is expensive, but very trick and works very well (3-phase DC fuel pump with variable pressure delivery based on ECM requested pressure). Fuel delivery for any high bandwidth engine will always be difficult (and expensive) to do correctly.

Can run with E67 production controller as well with fixed pressure.

help! I have a '67 Nova in the shop with an LS9, no computer, harness or tank. Hector at Rick's is selling me a tank with a CTS-V pump. Is this the right set-up? who do I goto for the harness and computer? Dave would you be interested in building a harness and computer?- Chris