1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

3" MAF Unmapped Car

WorkInProgress Apr 22, 2013

  1. WorkInProgress

    WorkInProgress Member

    253
    7
    18
    Just won a 3" alloy MAF pipe line on Ebay, is there any benefit to fitting this to an unmapped car or should I just hang on to it until mapping time?
     
  2. Prawn

    Prawn My other car is a MINI!!!!

    11,575
    3,546
    113
    If you fit it unmapped you'll under fuel like crazy and side lots of damage and problems matey. Don't do it!

    larger mafs should only be fitted for mapping, not before.
     
    WorkInProgress likes this.
  3. WorkInProgress

    WorkInProgress Member

    253
    7
    18
    Cheers Prawn :thumbsup:
     
  4. Grale1

    Grale1 Active Member

    795
    44
    28
    Could i run a 3" MAF on my stage1 map prawn? As I'm wanting to go stage2 I also have saab red top injectors to go in at some point.

    sorry for the thread jump btw
     
  5. Jay A3

    Jay A3 #because Racecar Team Daytona Audi A3 Manual

    2,130
    356
    83
    Niki told me when I did mine if im jus fitting the maf then dont, but if your fitting injectors at the same time then it would be ok as a temp as this will help stop it under fueling.. Better to leave it and fit the same week as you get mapped if not on the day of the map
     
  6. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow... Staff Member Moderator Audi S3

    21,573
    4,047
    113
    No...

    <tuffty/>
     
  7. Prawn

    Prawn My other car is a MINI!!!!

    11,575
    3,546
    113
    definitely not the same week dude! Not even the morning before you leave! It only takes one journey running dangerously mean to blow it up.

    In theory, by fitting the larger MAF it'll under fuel by 38% or there abouts, the d u can compensate up to 25%, but that still leaves a 13% miss match to deal with. Adding merger maf AND injectors as you say is technically safer, but its a non calculated bodge at best, you know you've not got enough fuel, But you don't know how much, so you add injectors to add more fuel, but again, you don't know how much!
    It's of guesswork, crossed fingers, and hopes and prayers involved on that one. Better to just leave it id say!
     
  8. badger5

    badger5 www.badger5.co.uk Site Sponsor

    9,543
    2,022
    113
    alloy maf - no flow straightener
     
  9. WorkInProgress

    WorkInProgress Member

    253
    7
    18
    Is this a bad thing Bill? (excuse my ignorance)
     
  10. Prawn

    Prawn My other car is a MINI!!!!

    11,575
    3,546
    113
    Yes. Logs will show you increased airflow, and you'll think that your gained, but in reality the airflow isn't smooth enough and I think bills dyno testing showed losses despite the airflow gains.
     
  11. badger5

    badger5 www.badger5.co.uk Site Sponsor

    9,543
    2,022
    113
    unstable (non laminar) across sensor element which in turn may well mess with the fueling

    likely a bad thing.. Not had +ve experience of non screened larger MAF tubes personally - It reads "higher" yet inaccurate airflow
     
  12. WorkInProgress

    WorkInProgress Member

    253
    7
    18
    Would something like this help matters: -

    [​IMG]
     

Share This Page