LB7: Max rail psi with dual lb7 cp3s

[lmmcbrown0917]

So what are two stock lb7 cp3s capable of with lb7 regs? Power and rail psi wise?

 

[Dvierra86]

Depends upon tuning. But the lb7 factory tuning is 160mpa. Duel fuelers Shouldnt exactly bump pressure just increase volume at higher pressures

 

[lmmcbrown0917]

Depends upon tuning. But the lb7 factory tuning is 160mpa. Duel fuelers Shouldnt exactly bump pressure just increase volume at higher pressures

Can the it be raised over 160mpa in the tuning or is that the max for the regulator?

 

[Dallas S]

Can be raise

 

[CaptPhil]

It can be raised, but over 180mpa the ecm can no longer control the pressure because the rail pressure sensor can't read over 180mpa.

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[2004LB7]

Also you run the risk of cracking an injector if you push it too much. The first batch bosch made where prone to cracking. The improved version was better but can still crack

 

[lmmcbrown0917]

It can be raised, but over 180mpa the ecm can no longer control the pressure because the rail pressure sensor can't read over 180mpa.

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what does 180mpa add up to in psi?

 

[DAVe3283]

what does 180mpa add up to in psi?

26106.8 PSI

 

[lmmcbrown0917]

26106.8 PSI

thanks, i was thinking it was something close to that.

 

[Awenta]

Google.

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[2004LB7]

1 mpa = 145 psi

 

[duramaxzak]

Now I understand why my truck holds right at 26,100 going down the track!!!

 

[Awenta]

Are the newer pressure sensors interchangeable?

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[THEFERMANATOR]

The LB7/LLY pressure sensor is only scaled to read up to 180. I've scaled them to read up to around 205 MPA, and set them in the tuning to run 200, and had them hold there. It's not good for the pressure sensor as its not meant to run there. LB7 injectors seem to hold up to the pressure OK, but LLY's not so well. There is a pressed in ball in the side of an LLY injector, and it is known to come out at anything north of 175 MPA of pressure. Many people get lucky, but I seen somebody lose 5 injectors in one calling for 178 MPA for rail pressure.