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Thread: 3"intake with turbo inlet pipe need tune?

  1. #1

    Default 3"intake with turbo inlet pipe need tune?

    Hey ive got a stock mps gen 2 and was wanting a spool noise when i boost if i add a 3" intake and turbo inlet pipe will i need to tune or will it learn the new air ratio and adjust accordingly? Cheers

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  2. #2

    Default

    Yes you will, i have a 6 and i moved from 2.5 to a 3 TIP and car ran like crap. after tune it was fine

    just get a 2.5 metal intake , was good enough sound etc

  3. #3
    Join Date
    Apr 2010
    Location
    Canberra
    Posts
    9,459

    Default

    If you change the MAF housing to something bigger, you will need a tune.

    Car can compensate about 5-10%, but going 3" is almost 20% bigger...

  4. #4

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    Yes...just yes. If you just want ricer noise, a stock-sized intake is fine (actually often louder than a 3"+). You only go 3" for performance and for that you need a good tune.

    Sent from my Nexus 6 using Tapatalk

  5. #5

    Default

    What if the intakes 72mm so about 2.8"

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  6. #6
    Join Date
    Jan 2015
    Location
    Central Coast
    Posts
    174

    Default

    That's pretty much the stock size and shouldn't require a tune.

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  7. #7

    Default

    What is the intake?

    72 mm is still 17% larger than oem ((72^2)/(66.5^2)=117), so you will be very close to maxing your allowed LTFT (25% I think) and tripping a cell. Add in some weather and fuel fluctuation (the stuff LTFT is meant to account for) and I'd venture it's almost certain (particularly given I did so on a stock sized corksport intake).

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  8. #8
    Join Date
    Apr 2010
    Location
    Canberra
    Posts
    9,459

    Default

    Quote Originally Posted by Lachlan View Post
    What is the intake?

    72 mm is still 17% larger than oem ((72^2)/(66.5^2)=117), so you will be very close to maxing your allowed LTFT (25% I think) and tripping a cell. Add in some weather and fuel fluctuation (the stuff LTFT is meant to account for) and I'd venture it's almost certain (particularly given I did so on a stock sized corksport intake).

    Sent from my Nexus 6 using Tapatalk
    I'm guessing 3" htp or another that's measured on the outside...

    In which case yes, still need a tune
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