BD fuelbox change psi

[Hemvist]

Boondocker fuelBox modify boost pressure between the tours by itself.

For example, when I turn of the machine Is tuned at 9.0 psi, next time I start It up Its tuned to 8.8..

Anyone?

 

[mountainhorse]

If it is a recent kit.... it has electronic boost control... EBC.

That adjusts for altitude to keep the Absolute pressure in the charge side (MAP) as consistent as possible... Also... a typical gauge will read differently at different altitudes even if the MAP remains constant.



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[Hemvist]

Ok, thanks!

Its from 13/14. gt2860. I run sea level all the time, diffrence Is only temperature.

 

[Jshlee3]

If it is a recent kit.... it has electronic boost control... EBC.

That adjusts for altitude to keep the Absolute pressure in the charge side (MAP) as consistent as possible... Also... a typical gauge will read differently at different altitudes even if the MAP remains constant.



.

Sorry to jump in here but I think I have the same question for a 2015 controller.

So what does that number in the upper right hand corner on startup actually represents? I was thinking it was the gauge boost pressure but sometimes it reads lower than the boost pressure set in the control box.

For example say you set the boost at 9psi and are at 6,000' elevation is it boosting 9psi over the atmospheric pressure at 6,000' or 9psi over atmospheric at sea level? I have seen people discussing this issue but I haven't found any explanations on what the controller is actually displaying.

To me it makes sense to display a number at "standard" conditions (ie sea level); maybe I'm just biased.

 

[fastgas]

The displayed value is the target boost pressure which is a gauge pressure. This value will go up and down based on current atmospheric pressure so the total pressure at the engine always remains the same (it uses a built-in baro sensor). The pressures are only displayed in .2 psi increments (on Startup and Stats screens) so it's probably really at 8.9psi (the internal boost value used for fueling is much more precise). Also, the boost adjust screen displays the compensated target gauge pressure, which should change according to atmospheric pressure. This is how all the control boxes work with the built-in EBC.

 

[Jshlee3]

The displayed value is the target boost pressure which is a gauge pressure. This value will go up and down based on current atmospheric pressure so the total pressure at the engine always remains the same (it uses a built-in baro sensor). The pressures are only displayed in .2 psi increments (on Startup and Stats screens) so it's probably really at 8.9psi (the internal boost value used for fueling is much more precise). Also, the boost adjust screen displays the compensated target gauge pressure, which should change according to atmospheric pressure. This is how all the control boxes work with the built-in EBC.

Sorry for the dumb question I'm new to the turbo scene. I was trying to get a baseline on how much boost people are running with similar setups, elevation, and gas mixture. I was setting boost level at home and just running it but I guess I need to be watching what the controller actually adjust to at elevation. Unless of course there are other people like me reporting what they set the controller at home and riding at much higher altitude. Too bad we can't be talking in absolute pressure.

 

[Clarke673]

i have attached Boondocker PDF for your system. What fuel are you running?

 

[Hemvist]

I run pumpgas, 98 octan. (Sweden)