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2 Bar Map Sensor

Old 03-05-2003, 06:29 PM
  #1  
0.5 BAR
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Default 2 Bar Map Sensor

Does anyone know where I can get a 2 bar map sensor for a 2000 civic ex. I've been using a missing link but it still breaks the map sensor and I'm only running 8psi.
TurboCIvic2000 is offline  
Old 03-06-2003, 12:04 AM
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Default Re:2 Bar Map Sensor

Hondata is the only company I know of that makes 'actual' MAP sensors for above stock bar signal.
I'm not sure if it fits 2000 or not, but worth a check http://www.hondata.com
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Old 03-06-2003, 01:11 AM
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Default Re:2 Bar Map Sensor

GM 2 or 3 bar map will do ya fine.

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Old 03-06-2003, 07:53 AM
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Default Re:2 Bar Map Sensor

and u will need a ecu able to reconize that aswell or some other "boxes"
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Old 03-06-2003, 09:24 AM
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T3
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Default Re:2 Bar Map Sensor

Originally Posted by leed
GM 2 or 3 bar map will do ya fine.


I heard this only works with a stand-alone-mg or a piggy-back system.Did I hear wrong?
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Old 03-06-2003, 10:57 AM
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Default Re:2 Bar Map Sensor

Well the voltage swing is the same on them regardless of who makes it(close enough anyways), ~0v-~5v. So as long as you wire it correctly it doesn't matter if it is a honda map, gm map, ford map....well nm ford.....they suck at everything



Mike
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Old 03-06-2003, 12:07 PM
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Default Re:2 Bar Map Sensor

Originally Posted by T3
Originally Posted by leed
GM 2 or 3 bar map will do ya fine.

I heard this only works with a stand-alone-mg or a piggy-back system.Did I hear wrong?
yup...that's what i heard too.

Jeff-
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Old 03-06-2003, 03:38 PM
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Default Re:2 Bar Map Sensor

The 2/3 BAR MAP sensors Hondata uses are GM sensors, not their own. You have to have something that understands that you are using a different sensor such as a piggyback system or re-programmed ECU.

Basically you have a voltage range of 0-5 volts. The stock sensor devides the voltage up based on normal atmospheric pressure, and ~3.1 volts throws a code because it should never see over that voltage range normally aspirated. The reason why you can get ~9 PSI outta the stock sensor is because you still have 2 volts left, but you have to program or fool the ECU to see these extra 2 volts. The 2 and 3 BAR sensors still use the same range (0-5 volts) but the increments are bigger to allow for more pressure, so @ 3 volts on a 2 BAR sensor you are already into ~7 PSI. If the ECU doesn't understand that, it thinks you are at 0 PSI and is not providing neither the fuel nor ignition adiquate for that kind of positive pressure.

The piggyback or re-programmed ECU *knows* that 3 volts now means ~7 PSI and accomodates with fuel/timing retard. Make sense?

Mike
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Old 03-28-2003, 04:21 AM
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Default Re:2 Bar Map Sensor

The stock Honda MAP is scaled to ~11.8 psi at 5 volts, but is physically limited due to construction to either 9.25 or 10.65 psi. GM 2 bar goes to 14.5 psi @ full five volts. The scales aren't that far off, you should be able to tune it with an AFC just fine. I can show you my work if you disagree, Mike, I'd actually like to have someone pick a few holes in it. You definitely have some perspective on the situation.

Tidbit of info for the day; Ford MAPs are frequency based, not voltage - they are incompatible with anything other than more Ford stuff. Furthermore, I LIKE Ford thank you very much
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Old 03-28-2003, 09:40 AM
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Default Re:2 Bar Map Sensor

does any one have the actual part #s for the gm 2 and 3 bar map sensers?

Beau
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