LMM high RPM fueling

[WVRigrat05]

I've read it before but can't remember why these trucks won't fuel past a certain RPM.

Mine feels like it's choking out past 3300 RPMs and I'd really like it to keep on keeping on.

 

[IOWA LLY]

Yours is probably choking because of your stock turbo.

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[WVRigrat05]

Could be, my LLY HD a stock turbo and it pulled to around 38-3900 RPM's and leveled out around 4000

 

[Josh154]

Mine drops off hard above 3k.. it holds rail great in first and doesn't gain it back till it hits 5h

 

[WVRigrat05]

The rail pressure is there in all gears wfo, but when it hits 3300+ it feels like it quits fueling, haven't logged rail or boost to see but it runs out of ass right quick.

Forgot to mention I've plugged another fuel filter in less than 5k miles. Junk ****ing fuel.

 

[NC-smokinlmm]

Cp3 looses efficency after 3000 rpms, thats where the sportsman cp3 came from. It fuels to 3600 I think.

 

[Dozerboy]

Both the turbo and the CP3 are weak links at that point. On my CP3 I had a good gain by porting the rail 1500psi. Might of picked up An extra 200psi by shifting at 3200 instead of 3600.


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[Josh154]

Both the turbo and the CP3 are weak links at that point. On my CP3 I had a good gain by porting the rail 1500psi. Might of picked up An extra 200psi by shifting at 3200 instead of 3600.


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Both sides or one side? I'm running the ported rail fitting on drivers side only.

 

[Dozerboy]

Just the drivers.


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[Josh154]

Ya my cp3 is just ****ed lol.

 

[WVRigrat05]

Mine just acts like it's choking out, I never run it that high like I did the LLY all the time and just noticed it, **** it I'll add some more low end fuel to make up for it