3bar Map sensor or Bosch 5bar questions
17-04-2007, 10:35 AM
#1
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3bar Map sensor or Bosch 5bar questions
Anyone know the outputs of these?
Either of them anywhere near 100.0 Hz per bar +/- 1% (absolute) ?
Or a Map sensor that is?
Either of them anywhere near 100.0 Hz per bar +/- 1% (absolute) ?
Or a Map sensor that is?
17-04-2007, 10:48 AM
#5
Professional Waffler
you could use a voltage based one,, and bang it thought a small chip called a voltage to freqauncy converter, the voltage might need scaling but thats always an option 
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17-04-2007, 11:03 AM
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The issue I have is my Stack Boost guage is reading 0.2-0.28 bar under the what the Pectel monitor is displaying.
When I bought my stack Boost guage the Gauge was new but the sensor wasn't.
I contacted Stack to see if the sesnor could be tested and they said yes at £30 or test it myself the output is 100.0 Hz per bar +/- 1% (absolute)
The stack sensor looks like this:-
When I bought my stack Boost guage the Gauge was new but the sensor wasn't.
I contacted Stack to see if the sesnor could be tested and they said yes at £30 or test it myself the output is 100.0 Hz per bar +/- 1% (absolute)
The stack sensor looks like this:-
17-04-2007, 11:05 AM
#10
Advanced PassionFord User
Sorry Gareth...
I started typing before fully enaging my brain....
I meant...I would think the stack would accept a standardish industrial type transducer or transmitter, either 0 - 100 mV, 4 - 20 mA, 0 - 5 V...
I'm trying to do too many jobs at once....
I started typing before fully enaging my brain....
I meant...I would think the stack would accept a standardish industrial type transducer or transmitter, either 0 - 100 mV, 4 - 20 mA, 0 - 5 V...
I'm trying to do too many jobs at once....
17-04-2007, 12:20 PM
#15
Testing the future
how can the pectel monitor be 'wrong'?
that will tell you what the ecu is using to look up the map values which i would have thought was the important thing.
if your chip is mapped up to 1.5 bar boost, then you should use a reading of 1.5 bar boost from the pectel monitor, not 1.5 bar boost on your gauge (as that will be 1.7 ~ 1.8 bar boost that your ecu thinks it's seeing)
bear in mind that the pectel datastream is sending the filtered value though, so it could lag behind another means of measurement during transient conditions
i'm sure simon could explain it better
that will tell you what the ecu is using to look up the map values which i would have thought was the important thing.
if your chip is mapped up to 1.5 bar boost, then you should use a reading of 1.5 bar boost from the pectel monitor, not 1.5 bar boost on your gauge (as that will be 1.7 ~ 1.8 bar boost that your ecu thinks it's seeing)
bear in mind that the pectel datastream is sending the filtered value though, so it could lag behind another means of measurement during transient conditions
i'm sure simon could explain it better
17-04-2007, 12:38 PM
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Originally Posted by foreigneRS
how can the pectel monitor be 'wrong'?
that will tell you what the ecu is using to look up the map values which i would have thought was the important thing.
if your chip is mapped up to 1.5 bar boost, then you should use a reading of 1.5 bar boost from the pectel monitor, not 1.5 bar boost on your gauge (as that will be 1.7 ~ 1.8 bar boost that your ecu thinks it's seeing)
bear in mind that the pectel datastream is sending the filtered value though, so it could lag behind another means of measurement during transient conditions
i'm sure simon could explain it better
that will tell you what the ecu is using to look up the map values which i would have thought was the important thing.
if your chip is mapped up to 1.5 bar boost, then you should use a reading of 1.5 bar boost from the pectel monitor, not 1.5 bar boost on your gauge (as that will be 1.7 ~ 1.8 bar boost that your ecu thinks it's seeing)
bear in mind that the pectel datastream is sending the filtered value though, so it could lag behind another means of measurement during transient conditions
i'm sure simon could explain it better
Totally agree doesn't really matter what the Stack says as I'm only interested in what the ECU is seeing.
Even if the Pectel datastream is slightly lagged the Stack is still reading less
I think I'll post the sensor of to stack to be checked out
17-04-2007, 01:52 PM
#17
You may be lucky Paul - there are a couple of small screws hidden behind mastic - they may allow the sensor to be trimmed if it is out of spec.(Unfortunatley I found this out the hard way when I had a sensor fail after 5 minutes use but of course out of warranty so I ripped it apart - it's packed inside with 2 PCBs)
17-04-2007, 01:54 PM
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Originally Posted by jon@work
You may be lucky Paul - there are a couple of small screws hidden behind mastic - they may allow the sensor to be trimmed if it is out of spec.(Unfortunatley I found this out the hard way when I had a sensor fail after 5 minutes use but of course out of warranty so I ripped it apart - it's packed inside with 2 PCBs)
17-04-2007, 03:12 PM
#26
Originally Posted by Ryan
martins looks nothing like that one, infact it looks very very similar to the one you posted at the top but without the black bracketry.
17-04-2007, 08:01 PM
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I'm convinced the Stacks boost sensor is fucked, just took the car out with my mates mechanical boost guage and it was reading spot on with the Pectel monitor. The stack seems to be under reading even more now
Gonna have to get a new sensor
Gonna have to get a new sensor
17-04-2007, 08:09 PM
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Trust your pectel monitor if the car is running right....
Even if its working, 2 sensors or gauges rarely read identically due to
calibration, location of pick up, filtering and reaction time.
STACK's owners must be well minted
Nick,
You are spot on mate, I am redundant
Even if its working, 2 sensors or gauges rarely read identically due to
calibration, location of pick up, filtering and reaction time.
STACK's owners must be well minted
Nick,
You are spot on mate, I am redundant
17-04-2007, 08:21 PM
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Paul Ripley,
Yes, as Rick above said, you could use a "pic" (programable single chip computer)
to rescale any signal you have.
Would need to know what the stack expects as an input.
You could use a 3 bar but the stack would then only read up to 2 bar boost.
If you were going to do it, I would use another sensor like the bosch 5 bar
(actually 3.5 bar boost)
Easy to do if you know how but I dont have time myself at the moment
till the end of the month. Busy doing a pectel to aim dash converter
Sell the stack and buy a decent mechanical gauge IMO
Yes, as Rick above said, you could use a "pic" (programable single chip computer)
to rescale any signal you have.
Would need to know what the stack expects as an input.
You could use a 3 bar but the stack would then only read up to 2 bar boost.
If you were going to do it, I would use another sensor like the bosch 5 bar
(actually 3.5 bar boost)
Easy to do if you know how but I dont have time myself at the moment
till the end of the month. Busy doing a pectel to aim dash converter
Sell the stack and buy a decent mechanical gauge IMO
17-04-2007, 08:48 PM
#34
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Forgot to say....
RE: 5 bar sensor, as it was designed for a diesel engine, it has limits
in the vacuum range. It can only go down to 0.5 bar absolute.
Not a problem if you ignore that
If you fancy driving down to me in a few weeks time, I will do it while
you wait on your chosen sensor.
Let me know
RE: 5 bar sensor, as it was designed for a diesel engine, it has limits
in the vacuum range. It can only go down to 0.5 bar absolute.
Not a problem if you ignore that
If you fancy driving down to me in a few weeks time, I will do it while
you wait on your chosen sensor.
Let me know
17-04-2007, 08:52 PM
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Thats a good offer Simon 
where abouts are you? what sensor would you use? Personally I'll like to see what the ECU see's so if it could be taken from the 3bar map sensor that would be excellent 
where abouts are you? what sensor would you use? Personally I'll like to see what the ECU see's so if it could be taken from the 3bar map sensor that would be excellent
17-04-2007, 08:55 PM
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I live 10 miles away from the nearest city called BATH which is just off the M4 near Bristol.
Only 15 miles from castle combe circuit
Probally about a 2 hour drive for you
I would use a 5 bar to read boost properly above 2 bar actual boost
but if you can cope with NOT seeing above 2 bar boost the 3 bar is fine
Only 15 miles from castle combe circuit
Probally about a 2 hour drive for you
I would use a 5 bar to read boost properly above 2 bar actual boost
but if you can cope with NOT seeing above 2 bar boost the 3 bar is fine
17-04-2007, 09:38 PM
#37
Professional Waffler
Originally Posted by Electronic
If you were going to do it, I would use another sensor like the bosch 5 bar
(actually 3.5 bar boost)
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