Page 1 of 2 12 LastLast
Results 1 to 20 of 24

Thread: 05 c6 e40....best map sensor for 2.5 sd

  1. #1

    05 c6 e40....best map sensor for 2.5 sd

    I have read that the GM pn 12580698 is a 2.5 bar sensor. I was told by another person that it is a 5 pin sensor with an integrated IAT. I called my local GM place and they told me its was 3 pin. To sum it up.....I am looking for the best 2.5 bar sensor to use with the 2.5 bar custom os for the e40. I dont want to buy the wrong sensor and pigtial. TIA

  2. #2
    Супер Модератор EC_Tune's Avatar
    Join Date
    Apr 2003
    Location
    Almost 2000 feet.
    Posts
    7,880
    There is no 2.5 Bar sensor that is MAP only. The 0698 version is 2 bar (15 PSI boost) So unless you are going above ~15 PSI you are good. If you are headed for 2.5 bar (Max ~21 PSI Boost) you will have to get one of the old "brick" style 3 bar MAP sensors and run a vacuum line.
    Always Support Our Troops!

  3. #3
    Thats what I wanted to do but there is a 256kpa limit in the computer. I am looking to run over 15 psi.

    http://www.hptuners.com/forum/showth...1186#post81186

    People are mentioning this number as 2.5 bar map sensor. I wouldn't mind if it was 2.5 map and Iat. If the Iat was correct I could just use it....or leave it unwired if not. Right?
    Last edited by fasttrackperformace; 02-05-2008 at 03:39 AM.

  4. #4
    Advanced Tuner
    Join Date
    May 2006
    Location
    Catlettsburg, Ky
    Posts
    364
    Everyone says you can use a 3 bar map with the 2.5 os, but how? I understand that os still stops at 255kpa reguardless, but you can't even configure it for a 3 bar sensor. The map linear has has a max value of 256. Unless you can plug in a value around 300, I don't see how you can make it read correct.

    What's the purpose of the Linear B?

  5. #5
    HP Tuners Owner Chris@HPTuners's Avatar
    Join Date
    Mar 2003
    Location
    Melbourne, Australia
    Posts
    5,249
    You need to be careful with the Cobalt becuase they have 3 MAP sensors if i remember correctly.

    1. combo MAP + IAT goes in the manifold, 2.5 bar
    2. inlet air pressure (in the intake path) 1 bar i think
    3. baro sensor (2 bar i think)

    You should be able to wire up the 2.5bar MAP + IAT sensor and just not use the IAT part.

    The numbers for this sensor are linear 270.59 (the max you can enter is 256) and offset -3.30, which i think the min you can enter is 0. It will be close but not exact.

    In the later E38 ECM the limits are different and you can use a 3bar sensor no problems. I was getting confused between the two in a previous post as i was working on the E38 code at the time. Sorry.

    Chris...
    I count sheep in hex...

  6. #6
    Stumbled across this post so I figured I would add some info.

    A 3bar map sensor will not work properly. Since you can't enter a value higher than 256 it will always read incorrectly. (I had a 3 bar installed and read map values while applying regulated pressure to the sensor and a boost gauge). I'm sure you could install and use this sensor but your KPA reading will never actually be right.

    2 bar obviously only reads 2 bar, so a real 2.5bar sensor is needed.

    I found this sensor online-

    20-250kpa and inexpensive.


    http://www.freescale.com/files/senso...t/MPX4250A.pdf

    http://www.mouser.com/search/refine.aspx?Ntt=MPX4250AP

    Installed it in an 05 C6 with APS twins, re-tested with regulated air/gauge and it reads up to 256kpa while matching boost gauge values perfectly.

  7. #7
    HP Tuners Support
    (foff667)
    Bill@HPTuners's Avatar
    Join Date
    Jun 2004
    Location
    Clermont, FL
    Posts
    22,621
    Thanks for the info, I think I'll sticky this thread


  8. #8
    No problem.

  9. #9
    Tuner
    Join Date
    Aug 2004
    Location
    Franklin,OH
    Posts
    132
    So I am just checking before I go ahead and order this for a customer. Is the above freescale sensor the way to go with the custom 2.5bar os?

    Tracey Scott
    Cincy Speed
    Lead Tech and Tuner
    http://www.facebook.com/cincyspeedracing

  10. #10
    Advanced Tuner
    Join Date
    Dec 2005
    Location
    Sydney Australia
    Posts
    474
    yep that sensor is a true 2.5bar, it is used in a lot of after market ECU's here in aus and works a treat

  11. #11
    Tuner TYRFRYR's Avatar
    Join Date
    Mar 2007
    Location
    Southern Louisiana
    Posts
    58
    Quote Originally Posted by EC_Tune View Post
    The 0698 version is 2 bar (15 PSI boost) So unless you are going above ~15 PSI you are good.

    Is this a brick style sensor or does in fit into the MAP port on the LS3 intake maniflod ?

  12. #12
    Senior Tuner 5_Liter_Eater's Avatar
    Join Date
    Nov 2005
    Location
    Houston, TX
    Posts
    3,844
    fits in the manifold.
    Bill Winters

    '05 Corvette - Iron Block 408 & TTIX - 928 RWHP / 926 RWTQ @ 21#

    "When life hands you lemons you upgrade to a C6." - Me

    Always post a tune and a log when asking questions.

  13. #13
    Tuner TYRFRYR's Avatar
    Join Date
    Mar 2007
    Location
    Southern Louisiana
    Posts
    58
    Thanks Bill,

    P.S. Is that a Lap day at TMS??

  14. #14
    Senior Tuner 5_Liter_Eater's Avatar
    Join Date
    Nov 2005
    Location
    Houston, TX
    Posts
    3,844
    TWS in College Station. Lots of fun!
    Bill Winters

    '05 Corvette - Iron Block 408 & TTIX - 928 RWHP / 926 RWTQ @ 21#

    "When life hands you lemons you upgrade to a C6." - Me

    Always post a tune and a log when asking questions.

  15. #15
    Tuner in Training
    Join Date
    Apr 2007
    Posts
    33
    I have this map sensor can someone tell me how it hooks up to my 05 gto wiring and what I have to change in the E40 and or tune? TIA

  16. #16
    Tuner in Training Ironmancan's Avatar
    Join Date
    May 2008
    Location
    Jacksonville NC
    Posts
    43
    Bump...
    06 Twin Turbo GTO

  17. #17
    Senior Tuner 5_Liter_Eater's Avatar
    Join Date
    Nov 2005
    Location
    Houston, TX
    Posts
    3,844
    It just plugs in...
    Bill Winters

    '05 Corvette - Iron Block 408 & TTIX - 928 RWHP / 926 RWTQ @ 21#

    "When life hands you lemons you upgrade to a C6." - Me

    Always post a tune and a log when asking questions.

  18. #18
    Tuner in Training c6dude's Avatar
    Join Date
    Oct 2005
    Location
    Posts
    19
    Here is one I made that uses the Mouser electronics unit that is plug and play.

    http://www.dpecorvettes.com/gpage4.html
    .
    .
    .
    .
    .

  19. #19
    Advanced Tuner
    Join Date
    May 2009
    Posts
    414
    Quote Originally Posted by c6dude View Post
    Here is one I made that uses the Mouser electronics unit that is plug and play.

    http://www.dpecorvettes.com/gpage4.html
    .
    .
    .
    .
    .
    Im using this sensor in my car right now and it seems to work pretty good. Im using a linear of 256kpa(is this correct?) and my factory 1bar setup read 103kpa key on engine off..so I set the offset to 9 to get to the same 103kpa..
    2004 350z/LS2: ERL 434ci, 11.8:1,TFS245cc,262/266@113+3,Fast102,NX 102 plate,60#injectors/return w/twin 255s


    Old setup: CNC'd317s, Fast 102, 228/228@114, PT88,83#injectors/full return system. 10.84@138

  20. #20
    Tuner in Training c6dude's Avatar
    Join Date
    Oct 2005
    Location
    Posts
    19
    Quote Originally Posted by Snyper View Post
    Im using this sensor in my car right now and it seems to work pretty good. Im using a linear of 256kpa(is this correct?) and my factory 1bar setup read 103kpa key on engine off..so I set the offset to 9 to get to the same 103kpa..

    Snyper

    The Sensor's range is 20-250kp
    http://www.dpecorvettes.com/gpage4.html


    0.2V = 20 kPa - 2.9 PSI
    4.9V = 250 kPa -36.25 PSI
    Accuracy +- 1.5% of the full scale value (+- 0.5 PSI)

    This sensor is linear which makes tuning easier.
    Here is a chart that should help you out.

    Perry