The GOODbox
10-08-2014, 03:11 PM
#476
One thing that can cause calibration errors and/or inconsistent results is a ground loop. This comes from different devices being grounded at different points on the chassis. The solution is to bring the probe ground back on a separate wire and attach it to the same wire as the GoodBox.
So I have a 4-hole terminal block for both the +12VDC and the ground. obviously the first hole on both is taken by the 12V/Gnd input. The remaining 3 power the cigarette lighter, the Goodbox, and the 5V regulator for the probe. The returning temperature analog signal wire is soldered directly to the Aux input point and the ground wire from the temperature probe comes back and is hooked into the same hole that the Goodbox gets its ground from on the terminal block. Literally the same point.... still not sure what's going on here unless the ADC has a malfunction.
Last edited by Lord ET; 10-08-2014 at 03:13 PM.
01-13-2015, 08:10 PM
#477
Dondo & Easy sent me a replacement GOODBox because of the crazy aux. input issue I waas having. This is a new rev board (green) and components in slightly different places. This seems to have fixed the all-over-the-place nature of my initial goodbox. Thanks guys!
01-15-2015, 09:57 PM
#478
This is a great find. I wish I'd found these earlier! I think I may go with these rather than the AEM sensors, as even with international shipping, both are only a little more than the price I would pay for just an AEM pressure sensor from my local reseller. 
I practised my Excel-fu, and based on their documented slope-intercept values came up with the conversion factors needed to plug in to the GOODbox for the temperature sensor:
Temperature
Fahrenheit:
Multiplier = 271, Offset = 0
FinalValue = ((271 * RawValue) / 1000) + 0
I practised my Excel-fu, and based on their documented slope-intercept values came up with the conversion factors needed to plug in to the GOODbox for the temperature sensor:
Temperature
Fahrenheit:
Multiplier = 271, Offset = 0
FinalValue = ((271 * RawValue) / 1000) + 0
The numbers I came up with are as follows:
Multiplier: 208
Offset: 41
This seems to be within 1-2 degrees from the low 100's up through 200F (that's the fastest I could transport a pot of boiling water to my engine bay and set everything in it.) I'm attaching my excel file to go along with it for anyone who's interested. The sender is not linear at certain temperatures, so I excluded some data from the graph. I then played with the multiplier and offsets until I got the best match for the region of interest (140 - 200).
Last edited by Lord ET; 01-15-2015 at 11:11 PM.
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Nuke It (01-12-2021)
05-09-2015, 06:32 PM
#479
My Canadian RX-8 does not have the TPS wiring module under the front dash. I got to this step in the Goodbox Gauge install and am not sure what to do. The wires I am supposed to spice into for the CAD feed are not here because my car does not have TPS sensors.
Does the CAD feed also go to the OBD-II pin connector under the steering wheel? There appears to be a Green/black and Blue/white wire there too. Is this the same one that would have been spliced to the TPS sensor module if it was there?
I apologize if this is already explained somewhere else, I couldn't find it. Thanks!
Jordan
Does the CAD feed also go to the OBD-II pin connector under the steering wheel? There appears to be a Green/black and Blue/white wire there too. Is this the same one that would have been spliced to the TPS sensor module if it was there?
I apologize if this is already explained somewhere else, I couldn't find it. Thanks!
Jordan
11-06-2015, 11:28 AM
#481
weeeeeeeeee
iTrader: (12)
I had the programmer and firmware, but sold the programmer and goodbox a year or so ago.
11-06-2015, 03:16 PM
#483
SARX Legend
iTrader: (46)
Found it:
put a 5..10ohm resistor inline in the power wire (red), and behind that (closer to the goodbox) a 15V zener diode between power and ground. Be sure the diode points towards the red wire (cathode on red), otherwise the diode will immediately pop.
11-06-2015, 05:34 PM
#485
SARX Legend
iTrader: (46)
I did it to mine and it worked. I did it like two years ago I think. I love my Goodbox, I use it more often then Torque or my Uscan or Cobb. I just wish it could display more OBD data.
11-07-2015, 09:15 AM
#486
Registered
My Canadian RX-8 does not have the TPS wiring module under the front dash. I got to this step in the Goodbox Gauge install and am not sure what to do. The wires I am supposed to spice into for the CAD feed are not here because my car does not have TPS sensors.
Does the CAD feed also go to the OBD-II pin connector under the steering wheel? There appears to be a Green/black and Blue/white wire there too. Is this the same one that would have been spliced to the TPS sensor module if it was there?
Does the CAD feed also go to the OBD-II pin connector under the steering wheel? There appears to be a Green/black and Blue/white wire there too. Is this the same one that would have been spliced to the TPS sensor module if it was there?
Was gonna do the resistor plus diode modification to mine, but laziness prevailed and I never got around to it - I find it to be only an occasional minor irritation, like once or twice a month.
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Loki (12-07-2017)
12-07-2017, 12:30 PM
#489
^^^ +1000
The dealer mechanic flipped when he saw the display showing fuel trims. There's definitely a market here, especially if it can be abstracted to other cars (at least other Mazdas that all have the same display).
I did get an email response from @goodboxmotorsports.com recently, so they still exist. Not sure if new units are still manufactured.
One data point I'd love to see added to the PIDs tracked is cat temperature. Because... yeah.
The dealer mechanic flipped when he saw the display showing fuel trims. There's definitely a market here, especially if it can be abstracted to other cars (at least other Mazdas that all have the same display).
I did get an email response from @goodboxmotorsports.com recently, so they still exist. Not sure if new units are still manufactured.
One data point I'd love to see added to the PIDs tracked is cat temperature. Because... yeah.
12-07-2017, 01:34 PM
#495
What am I doing here?
Join Date: Mar 2006
Location: 2017 Miata RF Launch Edition
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The only place I've seen them is here:
GoodBox Gauge RX8 | GOODbox Gauges
GoodBox Gauge RX8 | GOODbox Gauges
12-07-2017, 01:47 PM
#497
Nope. Whole project transferred to dondo way back in the day. Not sure how that's been going, no idea if new designs have been built, or even how the gen1 mazdaspeed3 version I designed has been put into production. I will admit there's some regret
12-08-2017, 11:59 AM
#498
Registered
Still got mine, still going strong after all these years.
Only thing with it is that the buttons have faded from the sun to a pink colour. Pieter, you don't happen to remember the details of manufacturer/part no. of these buttons, do you? It'd be nice to be able to get new ones (ideally from somewhere like Digikey, et al) and replace them.
Only thing with it is that the buttons have faded from the sun to a pink colour. Pieter, you don't happen to remember the details of manufacturer/part no. of these buttons, do you? It'd be nice to be able to get new ones (ideally from somewhere like Digikey, et al) and replace them.
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HwAoRrDk (12-08-2017)