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85mm slp maf sensor?

This is a discussion on 85mm slp maf sensor? within the Internal Engine forums, part of the LSx Technical Help Section category; im buying a set of 5.3l heads and a 228 cam, and 85mm bbk intake. Do i have to buy ...

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    85mm slp maf sensor?

    im buying a set of 5.3l heads and a 228 cam, and 85mm bbk intake. Do i have to buy the 85mm maf or will the slp maf i have on there now still work? my stock throttle body will bolt up too right?

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    Yes it will bolt up. You should really still have the stock MAF on the car. Aftermarket MAF' do no good.

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    Ive heard that from alot of guys on here. why are the aftermarket mafs so bad? they say an slp maf will gain 10 hp. just curious as to why they are bad

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    Quote Originally Posted by jmatt07 View Post
    Ive heard that from alot of guys on here. why are the aftermarket mafs so bad? they say an slp maf will gain 10 hp. just curious as to why they are bad
    People say they are bad because they require a tune.

    My argument is basic fluid dynamics...the fact that a fluid system only flows as much as it's smallest point. So, if you have a Fast Toys 85mm Lid (which is really 95mm), a 90mm TB, a 90mm Intake, and a stock MAF (78mm) you're really only flowing 4778.36 Square Millimeters as opposed to 5674.50 Square Millimeters with a 85mm MAF. Even better you can eliminate your MAF and go Speed Density and have the smallest point be your 90mm TB (or 78mm if you're stock).

    Cliff's Notes of Calculations:

    - Stock Flow (78mm Lid, 78mm MAF, and 78mm Intake/TB): 4778.36 Square Millimeters
    - Aftermarket (95mm Lid, 85mm MAF, and 90mm Intake/TB): 5674.50 Square Millimeters
    - Aftermarket + Speed Density: (95mm Lid, No MAF, and 90mm Intake/TB): 6361.72 Square Milimeters

    Eventhough "the stock MAF is good to 500hp", you can accomplish more HP if you upgrade the MAF (or eliminate it completely) and unrestrict your airflow.

    PS: I have my suit on, but you guys can't deny the Math

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    Quote Originally Posted by ls1camino View Post
    People say they are bad because they require a tune.

    My argument is basic fluid dynamics...the fact that a fluid system only flows as much as it's smallest point. So, if you have a Fast Toys 85mm Lid (which is really 95mm), a 90mm TB, a 90mm Intake, and a stock MAF (78mm) you're really only flowing 4778.36 Square Millimeters as opposed to 5674.50 Square Millimeters with a 85mm MAF. Even better you can eliminate your MAF and go Speed Density and have the smallest point be your 90mm TB (or 78mm if you're stock).

    Cliff's Notes of Calculations:

    - Stock Flow (78mm Lid, 78mm MAF, and 78mm Intake/TB): 4778.36 Square Millimeters
    - Aftermarket (95mm Lid, 85mm MAF, and 90mm Intake/TB): 5674.50 Square Millimeters
    - Aftermarket + Speed Density: (95mm Lid, No MAF, and 90mm Intake/TB): 6361.72 Square Milimeters

    Eventhough "the stock MAF is good to 500hp", you can accomplish more HP if you upgrade the MAF (or eliminate it completely) and unrestrict your airflow.

    PS: I have my suit on, but you guys can't deny the Math
    The only problem with them is the fact that they often lean the car out, which it will then back timing out and you'll actually lose power. I just ported my stocker for the hell of it, and its probably more free flowing than a 85mm SLP. You can take ALOT of metal out of them.

    If you want a 85mm, just get a Z06 or truck MAF.

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    Quote Originally Posted by squee View Post
    The only problem with them is the fact that they often lean the car out, which it will then back timing out and you'll actually lose power. I just ported my stocker for the hell of it, and its probably more free flowing than a 85mm SLP. You can take ALOT of metal out of them.

    If you want a 85mm, just get a Z06 or truck MAF.
    That is why you get a tune

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    Quote Originally Posted by ls1camino View Post
    That is why you get a tune
    No kidding...Most people don't want to get a tune or retune just for a MAF though...Not to mention SLP says its plug and play and doesn't require one.

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    Quote Originally Posted by squee View Post
    No kidding...Most people don't want to get a tune or retune just for a MAF though...Not to mention SLP says its plug and play and doesn't require one.
    Good points.

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    For a aftermarket MAF to work properly, it requires a tune.
    The h.p gain compared to how much a MAF and tune will cost is not worth it.
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    Quote Originally Posted by nhraformula View Post
    For a aftermarket MAF to work properly, it requires a tune.
    The h.p gain compared to how much a MAF and tune will cost is not worth it.
    Yeah, but if you add it on with a H/C/I swap, then you're getting a tune anyway.

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