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Thread: ZR1 Map Sensor??

  1. #1
    Join Date
    Jan 2019
    Location
    Fort Collins, Colorado
    Posts
    3
    My Cars
    1997 BMW M3

    ZR1 Map Sensor??

    I'm new to all of this FI stuff but the guy I bought a bundle of parts from said I'll need to get a ZR1 Map Sensor. I have no idea where this goes or what it does and how it relates to tuning. Could I get some feedback on this?

    Thanks!

    Car:
    1997 E36 M3
    Bundle:
    3.5" vibrant IC core
    3" piping
    Tial Q50 BOV
    Walbro 450
    Elring HG
    ARP Head Studs

  2. #2
    Join Date
    Apr 2006
    Location
    Minnesota eh?
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    5,595
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    86 325es
    The stock e36 ecu doesn't even use a map sensor. What did you get in the bundle of parts that this was supposed to be for?


    86 325es, 2.8L m50, S472sxe, MS3pro Ultimate, e85, solid rear axle, 4 link, spool, TH400 trans, Protorque converter, 28x10.5w slicks, zip ties
    Best = 9.43 @ 149.15 mph, 1.30 60 foot 28 psi boost

  3. #3
    Join Date
    Jan 2019
    Location
    Fort Collins, Colorado
    Posts
    3
    My Cars
    1997 BMW M3
    I asked the guy and he said the fabricator installed a bung on the IC piping for the MAP sensor to sit in. He said I would need to delete the stock MAF and wire the ZR1 MAP sensor to the stock ECU. When I asked how to do that he told me to ask the fabricator. So I sent the fabricator a message but I have a bad feeling about it. See pictures here: https://drive.google.com/drive/folde...uH?usp=sharing

  4. #4
    Def's Avatar
    Def is offline Lead Disagreement Eng PE
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    Aug 2002
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    Seattle, WA
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    SW22, Volt
    That almost looks like a 3/8" NPT bung for a typical GM IAT sensor. Never seen a MAP sensor that would actually mount on the IC piping in a bung that large.

  5. #5
    Join Date
    Jan 2019
    Location
    Fort Collins, Colorado
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    3
    My Cars
    1997 BMW M3
    Could be IAT, however my stock airbox doesn't have an IAT sensor. Wondering if I should just plug it up?
    Last edited by Sushi.m3; 01-22-2019 at 08:28 PM.

  6. #6
    Def's Avatar
    Def is offline Lead Disagreement Eng PE
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    SW22, Volt
    I think you should do some reading and planning before listening to random comments from people who aren't fully responsible for your build.

  7. #7
    Join Date
    Apr 2015
    Location
    Tennessee
    Posts
    1,104
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    1998 BMW 328i
    I don't see why you would need that sensor. Most tuners require certain maf sensors to be used with their software, and I don't see this guy supplying the so-called "bundle" including any software or tuning.

    Sent from my VS987 using Tapatalk

  8. #8
    Join Date
    Feb 2012
    Location
    Birmingham, Alabama, USA
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    8,323
    My Cars
    1995 BMW M3
    If you dont know the first thing about tuning (Like me) I would suggest getting with one of the several reputable tuners for the platform. I personally run 22rpd's tune and it has exceeded my expectations. So that would be my suggestion.

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