LMM rail pressure

[JoshH]

Has anyone else noticed LMMs holding rail pressure freakishly well? I've personally seen two trucks running lift pumps and big pulse width (3200+ uS) and holding great rail pressure (26,000+ PSI).

 

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Im always suprised how good my 170k mile lly holds 160mpa on 2800-3100us tunes with a lift pump and adjustment of the rail pressure current table, I even think I remember it holding fine without a lift pump and just adjustment of the table.

 

[gmduramax]

Has anyone else noticed LMMs holding rail pressure freakishly well? I've personally seen two trucks running lift pumps and big pulse width (3200+ uS) and holding great rail pressure (26,000+ PSI).

I thought the LMM injectors don't flow as much as LBZ.

 

[JoshH]

I thought the LMM injectors don't flow as much as LBZ.

That's what I'm thinking too. I know they dropped them from 7 hole to 6 hole tips. I guess they didn't bump up the orifice size enough to compensate. LMM injectors must be by far smaller than any other Duramax.

What kind of pulse width do you run on your truck? Still stock injectors?

 

[gmduramax]

That's what I'm thinking too. I know they dropped them from 7 hole to 6 hole tips. I guess they didn't bump up the orifice size enough to compensate. LMM injectors must be by far smaller than any other Duramax.

What kind of pulse width do you run on your truck? Still stock injectors?

When I ran my 11.8 it was 3100 pulse holding 25000.