Boondocker Box and EBC read different boost, what gives?

[TheBreeze]

When I set my boost on the EBC and make a run, I check the stats screen on the boondocker box and the max psi is always lower than what the EBC is set to run. Which number is more accurate? Why the difference in readouts? The boondocker box always reads below what the EBC is set to.

 

[jijohans]

If I don't remember wrong the max value has to be present for over 1sec to be recorded...

 

[supra_power2]

mine does that too

 

[kcdavidak]

mine does that too,I go by the stat screen. nines only off by half to three quarters a lb.

 

[TheBreeze]

Thanks for the replies. So most seem to think the boost reading at the stats screen of the boondocker box is more accurate than what the EBC reads under boost?

 

[wasatchcomm]

when my ebc is set too say 9lbs
and i do a pull and i'm wot for say 10 seconds, if i check my stat screen on my bdbox it will say my max boost was say 9.3lbs.
my stat screen always reads a little more boost than what my ebc is set at.
unless i dont get it wot for long enough to record it. or i dont go wot
it seems the boost will always spike a bit more than what the ebc is set at.
this is my experience.
however it sounds like you are having the exact opposite results i am having....

are you resetting your stats screen?

i do this probably 5-6 times a day, usually while i'm starting the sled up and letting it come up to temp for a minute or two...

 

[TheBreeze]

I was resetting the stats frequently. I wonder if I just wasnt holding it wide open for long enough. I bet I never had it wide open for more than 5-6 seconds without varying the throttle position other than a few instances. I was trying to be somewhat easy on it as it was my first trip with the sled and fresh topend.

 

[wasatchcomm]

ya, when i read your post originally thats what came to mind first,(not holding wot long enough)
next ride try it...

safe rippin!!!!

 

[wasatchcomm]

fresh top end?
how many miles?

 

[jijohans]

The difference between the ebc and bd box has to do with the calibration you do when you set it up.. The ebc has the pressure line connected and sends a electrical signal to the bd box.. I thinks the ebc reads the correct value... And remember the max value has to be steady for a couple of seconds for the bd box to record it as max.
Anyway when it's only less than 0.5psi differense I don't feel it's a problem...

 

[Dogmeat]

Yes, you do need to re-zero your pressure transducer from winter to spring I've found out.

My box was reading 1 psi high until I did that ...

 

[TheBreeze]

The boondocker box reads -.007 boost at idle. Does that mean it is calibrated?

 

[TheBreeze]

fresh top end?
how many miles?

The sled had 500 miles before the fresh topend. I bought it from Corsair guy on here and he threw new pistons in before shipping the sled to me.

 

[jijohans]

The boondocker box reads -.007 boost at idle. Does that mean it is calibrated?

I would say so.. In the manual it says that the Bd box should read ~0 at idle, if I remeber correctly....

 

[TheBreeze]

I figured it was, but have not really read up on all the details on the EBC.

 

[wasatchcomm]

here is the calibration instructions from boondockers site...

Calibration
Calibration is required only if using a Boondocker Fuel Control Box. Even if you are using a Boondocker Fuel Control Box, if you are using a separate pressure transducer, this calibration is NOT required.
The EBC provides an electrical signal to the Boondocker Fuel Control Box that represents boost pressure. The Control Box uses this signal to determine how much fuel to add for boost air. It is vital that when boost is zero, the Control Box reads zero. This is to avoid adding fuel at idle or failing to add enough fuel when on boost. This signal is calibrated at the factory so will be very close, but might need minor adjustment. Go to the first “STATS” screen on the Control Box. If it shows zero boost, then no calibration is needed. If it shows positive or negative boost, then with the motor idling scroll down to “PT CAL” in the configuration menu. If “PT CAL” does not appear, go to the altitude screen and hold the button for five seconds until it advances to “CFG”. After “PT” and “CAL” are displayed, the screen will display a number. Hold the button one second to make this number flash. Use short pushes of the button on the EBC face to adjust this value up or down. Hold the button down for one second to change direction, shown by the “+” or “-” sign. Change the number until control box reads zero boost. Changing the direction twice without making an adjustment will lock the calibration and the flashing will stop. More information on using the buttons and menus follows.