ls9

[morris69]

Is anyone running a ls9? What are the pros and cons. If any

[Firebirdsteve]

Pros: It's a total beast!
Cons: It's frickin $20,000

[camcojb]

Originally Posted by morris69

Is anyone running a ls9? What are the pros and cons. If any

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.

[hifi875]

the only con is cost. my father in-law had one in a 67 chevyII w/t56 magnum and it was a beast. started out with a 6l90 tranny but had ecu issues that caused it to do some weird stuff. If you can afford one, get one. they also make a statement when you pop the hood. alot more so than a ls w a aftermarket supercharger, even though they run as strong. just my .02

[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.