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Thread: 3" MAF Unmapped Car

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    WorkInProgress's Avatar
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    3" MAF Unmapped Car

    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?
    1999 1.8t AGU Sport 150 5dr
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    Awaiting Fitting
    ABT Rear Spoiler, Oettinger Grille, Catch Can
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  3. #2
    Prawn's Avatar
    My other car is a MINI!!!!

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    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.
    -------------------------------------------------------------------------------------------------

    Prawns TFSI Turbo'd 1.8T Track Car

    But I know nothing so ignore me.

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    Cheers Prawn
    1999 1.8t AGU Sport 150 5dr
    Fitted
    2.5" Decat Downpipe, 2.5" MeerKat Custom Cat-Back, R32 Wishbone Bushes, Black Diamond 12 Groove Discs, Phatnoise, S2000 Filter, HKS SSQV, BBS CH Rims,
    Koni STR.t Kit
    Awaiting Fitting
    ABT Rear Spoiler, Oettinger Grille, Catch Can
    Wanted
    5dr Black Leather Interior (Golf/Bora/A3)
    Plans
    Flocked Dash, Respray

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    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
    A3 1.8t AGU, fk ak street coilovers, silicone tip, silicone turbo outlet pipe, forge 007p ( yellow spring ), 80mm jetex cone filter, 3" cold air feed, 3" downpipe and de cat, R-tech stage1 map 187bhp- 227ft

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    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
    <Jay A3 build thread>



    241bhp K03s - R Tech

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    <tuffty/>'s Avatar
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    Quote Originally Posted by Grale1 View Post
    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
    No...

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

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    Prawn's Avatar
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    Quote Originally Posted by Jay A3 View Post
    Better to leave it and fit the same week as you get mapped if not on the day of the map
    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!
    -------------------------------------------------------------------------------------------------

    Prawns TFSI Turbo'd 1.8T Track Car

    But I know nothing so ignore me.

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    RIP S3dave

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    alloy maf - no flow straightener
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    Quote Originally Posted by badger5 View Post
    alloy maf - no flow straightener
    Is this a bad thing Bill? (excuse my ignorance)
    1999 1.8t AGU Sport 150 5dr
    Fitted
    2.5" Decat Downpipe, 2.5" MeerKat Custom Cat-Back, R32 Wishbone Bushes, Black Diamond 12 Groove Discs, Phatnoise, S2000 Filter, HKS SSQV, BBS CH Rims,
    Koni STR.t Kit
    Awaiting Fitting
    ABT Rear Spoiler, Oettinger Grille, Catch Can
    Wanted
    5dr Black Leather Interior (Golf/Bora/A3)
    Plans
    Flocked Dash, Respray

  11. #10
    Prawn's Avatar
    My other car is a MINI!!!!

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    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.
    -------------------------------------------------------------------------------------------------

    Prawns TFSI Turbo'd 1.8T Track Car

    But I know nothing so ignore me.

  12. #11
    RIP S3dave

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    Quote Originally Posted by WorkInProgress View Post
    Is this a bad thing Bill? (excuse my ignorance)
    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
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    Would something like this help matters: -

    1999 1.8t AGU Sport 150 5dr
    Fitted
    2.5" Decat Downpipe, 2.5" MeerKat Custom Cat-Back, R32 Wishbone Bushes, Black Diamond 12 Groove Discs, Phatnoise, S2000 Filter, HKS SSQV, BBS CH Rims,
    Koni STR.t Kit
    Awaiting Fitting
    ABT Rear Spoiler, Oettinger Grille, Catch Can
    Wanted
    5dr Black Leather Interior (Golf/Bora/A3)
    Plans
    Flocked Dash, Respray

 

 

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