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MAP sensor

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Old 05-05-2018, 06:03 PM
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Default MAP sensor

Are the map sensors from the NA and SC 3800s the same??
 
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Old 05-05-2018, 06:41 PM
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No, they are different
 
  #3  
Old 05-06-2018, 06:55 AM
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K thanks..
 
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Old 05-07-2018, 08:58 AM
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The NA one only reads up to 1 bar of pressure, the boost ones read 2 so they know the boost the engine is pushing.
 
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Old 05-07-2018, 02:35 PM
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Originally Posted by ChibiBlackSheep View Post
The NA one only reads up to 1 bar of pressure, the boost ones read 2 so they know the boost the engine is pushing.
Ok, if needed could I put the boosted MAP into a non boosted 3800?? This is highly unlikely but just in case I have to drive the backup btch..?
 
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Old 05-07-2018, 09:25 PM
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Originally Posted by wht02monte View Post
Ok, if needed could I put the boosted MAP into a non boosted 3800?? This is highly unlikely but just in case I have to drive the backup btch..?
No, they're not swappable like that. The output voltage has the same 0-5 volt range on both sensors. The 2 bar just has bigger jumps between each voltage point. So 14.7 psig will be nearly maxed at 5v on a 1 bar sensor, but a little below 2.5v on the 2 bar sensor. The pcm is tuned to know what value to expect for a given voltage, so just swapping them would probably freak out the pcm.

You could tune the NA engine to to work with the 2 bar, but it wouldn't make much sense. You can grab a used 1 bar from a junkyard for dirt cheap if you want a spare.
 

Last edited by bumpin96monte; 05-07-2018 at 09:28 PM.
  #7  
Old 05-08-2018, 07:52 AM
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Originally Posted by bumpin96monte View Post
No, they're not swappable like that. The output voltage has the same 0-5 volt range on both sensors. The 2 bar just has bigger jumps between each voltage point. So 14.7 psig will be nearly maxed at 5v on a 1 bar sensor, but a little below 2.5v on the 2 bar sensor. The pcm is tuned to know what value to expect for a given voltage, so just swapping them would probably freak out the pcm.

You could tune the NA engine to to work with the 2 bar, but it wouldn't make much sense. You can grab a used 1 bar from a junkyard for dirt cheap if you want a spare.
Yea, ok so the problem was I was told 60 bucks from the guy at the junkyard.. He was a new guy there..

Went to talk to the normal guy I deal with there, and got it for 5 bucks..

Good info to know tho, thanks..
 
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Old 05-08-2018, 11:15 AM
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That first guy was an idiot. Brand new retail is only like $45. The cheap aftermarket replacements go down under $20.

With all of the people that have done top swaps and such, you could probably get one for free from a local off one of the forums. I bet most get tossed in the trash as they're near valueless.
 

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