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Ported MAF ends

This is a discussion on Ported MAF ends within the External Engine forums, part of the LSx Technical Help Section category; Has anyone used any sort of ported maf ends on their car? I've seen them for sale on eBay and ...

  1. #1
    Member ldurham's Avatar
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    Ported MAF ends

    Has anyone used any sort of ported maf ends on their car? I've seen them for sale on eBay and FTP but wonder if they are worth the investment.

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    Senior Member tatertot91's Avatar
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    messing with the maf will throw off your air/fuel ratio. the stock one is fine

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    Member ldurham's Avatar
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    Sounds good to me lol

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    +1 on what Tater said. The MAF is designed to accurately meter the incoming airflow and any modification that affects its dimensions, such as porting, deblading or descreening, will result in unmetered air entering the engine and a lean condition.

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    Member ldurham's Avatar
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    Yea that makes sense Jeff, when I bought my car it had a descreened maf but I was able to acquire one with a screen so now it's screened. I guess it boggles me that Fast Toys sells these maf ends.
    Last edited by ldurham; 02-02-2012 at 10:23 AM.

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    Senior Member tatertot91's Avatar
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    Its like a throttle body spacer, just a way for them to make money

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    Member ldurham's Avatar
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    Shame on them

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    Member TA98's Avatar
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    Quote Originally Posted by pajeff02 View Post
    +1 on what Tater said. The MAF is designed to accurately meter the incoming airflow and any modification that affects its dimensions, such as porting, deblading or descreening, will result in unmetered air entering the engine and a lean condition.
    Its not unmetered air. It is still passing through the MAF. Unmetered air is air entering after the MAF. What they do is throw off your mass air flow transfer function. This can be corrected with a tune but an aftermarket MAF is useless unless youre making serious power and are pegging the meter.

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    Member TA98's Avatar
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    My MAF however is not ported, or debladed at all. I do not see how you would gain anything by doing this.

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    Quote Originally Posted by T/A98 View Post
    Its not unmetered air. It is still passing through the MAF. Unmetered air is air entering after the MAF. What they do is throw off your mass air flow transfer function. This can be corrected with a tune but an aftermarket MAF is useless unless youre making serious power and are pegging the meter.

    I stand corrected. Better explanation is that the MAF has a fixed diameter and internal dimensions with known flow characteristics. It works by heating a small wire that is then cooled by the incoming air. By measuring how much current is required to maintain the temperature of the wire, the MAF can interpolate airflow and send a signal to the PCM. Anything that alters the flow characteristics of the MAF throws off its calibration.

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