Maximum boost pressure?

[rickinAZ]

My Scangauge shows boost pressure topping out at 22.4 lbs, but I read on this forum that the Scangauge readout itself may be the limiting factor. Does anyone know more about this?

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[GSLSE21B]

My Scangauge shows boost pressure topping out at 22.4 lbs, but I read on this forum that the Scangauge readout itself may be the limiting factor. Does anyone know more about this?

Stock is 28. Mine was hitting 34.9 and going low on the fuel supply , I have it at 31 now doing some testing

 

[Gorilla57]

Stock is 28. Mine was hitting 34.9 and going low on the fuel supply , I have it at 31 now doing some testing

How are you running out of fuel? Isn’t the CP4 the same setup as what’s on the Ford/Chevy/Dodge full sized truck diesels?

 

[GSLSE21B]

How are you running out of fuel? Isn’t the CP4 the same setup as what’s on the Ford/Chevy/Dodge full sized truck diesels?

The derringer is only increasing fuel pressure , it doesn’t change injection timing . It’s turned down to 31 now and working fine .

 

[KNN]

The derringer is only increasing fuel pressure , it doesn’t change injection timing . It’s turned down to 31 now and working fine .

How do you adjust boost pressure?

 

[diamondschwin]

My Scangauge shows boost pressure topping out at 22.4 lbs, but I read on this forum that the Scangauge readout itself may be the limiting factor. Does anyone know more about this?

My SG maxes out at 22.6

not sure if there’s a way to adjust its readout.

 

[rickinAZ]

My SG maxes out at 22.6

not sure if there’s a way to adjust its readout.

Sorry that I didn't write a follow up. Scangauge took a few tries to get there, but their guys figured it out for me. [my max boost registers 27+ now.]
Try creating this Xgauge:

Boost Pressure (PSI) (Assumes 13.7 PSI Ambient Pressure) (Revised)
TXD: 07E0227056
RXF: C46285703656
RXD: 3010
MTH: 001D00C8ECE8
NAME: PSI

 

[diamondschwin]

Sorry that I didn't write a follow up. Scangauge took a few tries to get there, but their guys figured it out for me. [my max boost registers 27+ now.]
Try creating this Xgauge:

Boost Pressure (PSI) (Assumes 13.7 PSI Ambient Pressure) (Revised)
TXD: 07E0227056
RXF: C46285703656
RXD: 3010
MTH: 001D00C8ECE8
NAME: PSI

You are awesome. I’m going to set this up tomorrow AM!

 

[BuffaloBill]

Sorry that I didn't write a follow up. Scangauge took a few tries to get there, but their guys figured it out for me. [my max boost registers 27+ now.]
Try creating this Xgauge:

Boost Pressure (PSI) (Assumes 13.7 PSI Ambient Pressure) (Revised)
TXD: 07E0227056
RXF: C46285703656
RXD: 3010
MTH: 001D00C8ECE8
NAME: PSI

Do you mean 14.7 psi ambient?

 

[rickinAZ]

Do you mean 14.7 psi ambient?

That was a cut/paste of an email from Scangauge. That said, standard atmospheric pressure is 14.7 psi - so, yes, you are correct. I believe that it's just a typo, as opposed to something that changes the integrity of the setting..

 

[GSLSE21B]

Stock boost map

 

[WXman]

I've got to try that. My boost tops out at 22.7 PSI on the Scan Guage for the Ram and Jeep both.

 

[diamondschwin]

I've got to try that. My boost tops out at 22.7 PSI on the Scan Guage for the Ram and Jeep both.

It works… I’ve seen mine up around 28 or so… haven’t kept too close of an eye on it but before it seemed like it would hit the 22.6 or so and then just stick there even as you continued adding throttle.

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