Anyone useing the 3.3 Bar Delphi Map sensor ?
Thread Starter
TECH Enthusiast
Joined: Jan 2004
Posts: 608
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From: New Zealand
Anyone useing the 3.3 Bar Delphi Map sensor ? Hi,
Got a 3.3 Bar map sensor(factory style), looks to be plug and play for a ls6 manifold.
Just wondering what MAP scaler values you needed to get the sensor to read 101kpa at key on.
also read of another user not being able to get it to read below 40kpa and had trouble with idle cruise tuneing, any feedback appreciated.
Got a 3.3 Bar map sensor(factory style), looks to be plug and play for a ls6 manifold.
Just wondering what MAP scaler values you needed to get the sensor to read 101kpa at key on.
also read of another user not being able to get it to read below 40kpa and had trouble with idle cruise tuneing, any feedback appreciated.
Thread Starter
TECH Enthusiast
Joined: Jan 2004
Posts: 608
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From: New Zealand
part number on box is - PS10087
will get a pic up tomorrow but looks the same as factory, just a couple of extra tabs that need to be trimed off to make fit.
got it in and calibrated to read 101 kpa at key on, needed "446" in Map sensor scaler table (seems kinda high)
MAP in logs follow same cells as my 2bar sensor just giving it a bit of free revving and back to idle, but tune is now way off , has gone super lean everywhere and will need pretty big numbers even in the idle cells to bring it back into line !!!
any suggestions ?
any other map based tables need adjusting to compensate ?
will get a pic up tomorrow but looks the same as factory, just a couple of extra tabs that need to be trimed off to make fit.
got it in and calibrated to read 101 kpa at key on, needed "446" in Map sensor scaler table (seems kinda high)
MAP in logs follow same cells as my 2bar sensor just giving it a bit of free revving and back to idle, but tune is now way off , has gone super lean everywhere and will need pretty big numbers even in the idle cells to bring it back into line !!!
any suggestions ?
any other map based tables need adjusting to compensate ?
If this is the sensor I am thinking of it doesn't read vacuum for ****, which is also why it's used on Diesels mostly. Your cruise/idle/decel fueling will be muddy depending on how much vacuum your motor makes. I think you would want 330 in the map sensor scalar for that sensor but I can't remember off the top of my head what the curve looks like on the OEM spec sheet.
If this is the sensor I am thinking of it doesn't read vacuum for ****, which is also why it's used on Diesels mostly. Your cruise/idle/decel fueling will be muddy depending on how much vacuum your motor makes. I think you would want 330 in the map sensor scalar for that sensor but I can't remember off the top of my head what the curve looks like on the OEM spec sheet.
Thread Starter
TECH Enthusiast
Joined: Jan 2004
Posts: 608
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From: New Zealand
I have to have the map sensor scaler (efi live) at 446 to get the sensor to read 101 kpa at key on.
seams to read fine in vaccum but tune has gone extremly lean for some reason.
will have it on the dyno tomorrow and see what i can do with it, may go back to the 2bar if it gives me greif.
only looking to run 18psi, just wanted the 3bar for a bit more tuneability/safety, at that level,
and to be able to log boost all the way to 18psi.
seams to read fine in vaccum but tune has gone extremly lean for some reason.
will have it on the dyno tomorrow and see what i can do with it, may go back to the 2bar if it gives me greif.
only looking to run 18psi, just wanted the 3bar for a bit more tuneability/safety, at that level,
and to be able to log boost all the way to 18psi.
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On The Tree
Joined: Aug 2005
Posts: 152
Likes: 0
From: St. Petersburg, Florida
Why not run the 12223861 3 bar GM sensor?
Is it becuase you want a sensor that plugs into the intake? The regular 3 bar you mount on the firewall and nobody has an issue with. Its used on pretty much every aftermarket ecm.
Just asking..
Is it becuase you want a sensor that plugs into the intake? The regular 3 bar you mount on the firewall and nobody has an issue with. Its used on pretty much every aftermarket ecm.
Just asking..
I have that sensor now and it still doesn't work. I'm not sure if my BS3 is f'ed now because I used that other sensor or what. Just not sure at this point. I originally chose the 3.3 bar sensor because the pigtails matched. I guess I assumed because it was a 3.3 bar and plugged right up that it would be fine. I suppose I just hated hacking up my BS3 harness. As far as sticking in the intake, that didn't matter as I have a Victor Jr.
I'm not a tuner (not at all, ha ha) but i did watch my tuner geoff when he dialed it in.... he used 289 and then the box below it (efi live) he used 47 to get it to 100kpa and to get the left/right fuel trims to zero as compared to my 2 bar tune. My VE was at 56 at idle. I do not know the correct terms in tuning so excuse my description. It runs great as this is my daily driver. One thing i do notice is the AFR hunts around a little while cruising but it runs just fine. I hope this helps someone. Best of luck.
On The Tree
Joined: Aug 2005
Posts: 152
Likes: 0
From: St. Petersburg, Florida
I have that sensor now and it still doesn't work. I'm not sure if my BS3 is f'ed now because I used that other sensor or what. Just not sure at this point. I originally chose the 3.3 bar sensor because the pigtails matched. I guess I assumed because it was a 3.3 bar and plugged right up that it would be fine. I suppose I just hated hacking up my BS3 harness. As far as sticking in the intake, that didn't matter as I have a Victor Jr.
If you run 13 PSI boost, a 2 bar is better suited. Just like if you shift at 7000 then an 8k tach is fine. But if you get a 20K tach... then its hard to see the needle at 7000. In other words, putting a 3 bar sensor will not make you faster unless your running more than 16 PSI and less than 32 PSI.
Maybe your plugs are wired backwards?
If this helps.
Terminal A is ground.
Terminal B is signal
Terminal C is +5 vdc
Key ON.. 5 volts applied, sea level.. terminal B will read 1.6 volts on a 3 bar. 2bar will read 2.3 volts.
I have to have the map sensor scaler (efi live) at 446 to get the sensor to read 101 kpa at key on.
seams to read fine in vaccum but tune has gone extremly lean for some reason.
will have it on the dyno tomorrow and see what i can do with it, may go back to the 2bar if it gives me greif.
only looking to run 18psi, just wanted the 3bar for a bit more tuneability/safety, at that level,
and to be able to log boost all the way to 18psi.
seams to read fine in vaccum but tune has gone extremly lean for some reason.
will have it on the dyno tomorrow and see what i can do with it, may go back to the 2bar if it gives me greif.
only looking to run 18psi, just wanted the 3bar for a bit more tuneability/safety, at that level,
and to be able to log boost all the way to 18psi.
I run a custom 2.5bar map sensor that uses a stock, modified 1bar sensor. Running a 3bar sensor will gain no safety and actually lose tuneability over going with a 2..or 2.5 bar. My sensor goes all the way up to 255kpa or 22.9psi.
http://www.dpecorvettes.com/gpage4.html is where I got it from and have been running it for the past 6 months with no problems.
Basically you try and match a sensor to your intended goals as far as boost.
If you run 13 PSI boost, a 2 bar is better suited. Just like if you shift at 7000 then an 8k tach is fine. But if you get a 20K tach... then its hard to see the needle at 7000. In other words, putting a 3 bar sensor will not make you faster unless your running more than 16 PSI and less than 32 PSI.
Maybe your plugs are wired backwards?
If this helps.
Terminal A is ground.
Terminal B is signal
Terminal C is +5 vdc
Key ON.. 5 volts applied, sea level.. terminal B will read 1.6 volts on a 3 bar. 2bar will read 2.3 volts.
If you run 13 PSI boost, a 2 bar is better suited. Just like if you shift at 7000 then an 8k tach is fine. But if you get a 20K tach... then its hard to see the needle at 7000. In other words, putting a 3 bar sensor will not make you faster unless your running more than 16 PSI and less than 32 PSI.
Maybe your plugs are wired backwards?
If this helps.
Terminal A is ground.
Terminal B is signal
Terminal C is +5 vdc
Key ON.. 5 volts applied, sea level.. terminal B will read 1.6 volts on a 3 bar. 2bar will read 2.3 volts.
On The Tree
Joined: Aug 2005
Posts: 152
Likes: 0
From: St. Petersburg, Florida
I run a custom 2.5bar map sensor that uses a stock, modified 1bar sensor. Running a 3bar sensor will gain no safety and actually lose tuneability over going with a 2..or 2.5 bar. My sensor goes all the way up to 255kpa or 22.9psi.
http://www.dpecorvettes.com/gpage4.html is where I got it from and have been running it for the past 6 months with no problems.
http://www.dpecorvettes.com/gpage4.html is where I got it from and have been running it for the past 6 months with no problems.
Someone running 20-23 PSI.. a 2.5 bar.
Someone running 28 PSI.. a 3 bar.
On The Tree
Joined: Aug 2005
Posts: 152
Likes: 0
From: St. Petersburg, Florida
. And you saved money using the Motorola sensor.