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This is a discussion on AEM vs. Cobb intake system questions within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; id guess a tiny bit. i think zach has one....

  1. #76
    Registered User Ruh Roh's Avatar
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    id guess a tiny bit. i think zach has one.
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  3. #77
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    Re: AEM vs. Cobb intake system questions

    Quote Originally Posted by Ruh Roh View Post
    id guess a tiny bit. i think zach has one.
    Had one.

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  4. #78
    Pro Manscaper Mikie13's Avatar
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    Quote Originally Posted by zax View Post
    Had one.
    Now have that one.
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  5. #79
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    Re: AEM vs. Cobb intake system questions

    Quote Originally Posted by Mikie13 View Post
    Now have that one.
    No, you don't.

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  6. #80
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    Quote Originally Posted by zax View Post
    No, you don't.
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  7. #81
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    Quote Originally Posted by wrx_yfz
    going back to the Original Topic- is there some sort of shield you can make or buy to cover the AEM CAI? i just bought this and it's currently in the mail and all my friends are worried im going to get hydrolock, i live in New Hampshire so we get a decent amount of rain but nothing crazy. do you really have to pull over when it rains and take out the tubing?
    Quote Originally Posted by wrx650
    Hydrolock shouldn't be a problem. I just installed mine about a month ago and it seems pretty well protected in the wheel well. You would be driving through like 2+ feet of water and would have numerous problems on your hands at that point.
    ^^ Exactly that...

    If you get to the point where hydrolock is a serious concern, you're an idiot and you deserve it.
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  8. #82
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    Guy the box is really pointless on turboed cars because of the fact the by the time it reaches the turbo it's already hot. Boxes are more used in n/a cars. It's nice to have to use with stock duct but other then that it's not necessary

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    Quote Originally Posted by EuroWRX22
    Guy the box is really pointless on turboed cars because of the fact the by the time it reaches the turbo it's already hot. Boxes are more used in n/a cars. It's nice to have to use with stock duct but other then that it's not necessary
    Wrong
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  10. #84
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    Quote Originally Posted by EuroWRX22 View Post
    Guy the box is really pointless on turboed cars because of the fact the by the time it reaches the turbo it's already hot. Boxes are more used in n/a cars. It's nice to have to use with stock duct but other then that it's not necessary
    False.
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  11. #85
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    Re: AEM vs. Cobb intake system questions

    Quote Originally Posted by EuroWRX22 View Post
    Guy the box is really pointless on turboed cars because of the fact the by the time it reaches the turbo it's already hot. Boxes are more used in n/a cars. It's nice to have to use with stock duct but other then that it's not necessary
    Tell that to your IAT compensation.

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  12. #86
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    Quote Originally Posted by EuroWRX22 View Post
    Guy the box is really pointless on turboed cars because of the fact the by the time it reaches the turbo it's already hot. Boxes are more used in n/a cars. It's nice to have to use with stock duct but other then that it's not necessary

    OK OK, instead of just saying stuff randomly, as you, EUROWRX22, are doing, let us take a logical look at this.

    PV=nRT, where P=pressure, V=volume, n=# of moles of gas, R=gas constant (related to Boltzmann's constant, in which energy at the particle level is related to temperature), and T=temperature.

    So, as T decreases, assuming n is constant and, of course, R is a constant), what must happen to PV? Well, it has to increase if T is decreasing. What does this mean to your car? Well, as the temperature is decreasing, your able to jam more oxygen into your compression phase (as T rises, the density of the gas decreases due to density = m/V => V = m/density, and thus P(M/density) = nRT). Conversely, as your temperature increases, your turbine wheel must do MORE work (i.e. spin faster) to compensate for the decreasing amount of oxygen, which, at some point, will be unable to spin fast enough to keep up and your power will decrease.

    Where is some good proof? Here is a MS6, same tune, same exact setup, same DAY, with a 20 degree intake temperature change.



    It is clear to see that intake temperatures DO matter to overall power production in a turbocharged engine.


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    Last edited by nopistons93; 02-19-2013 at 03:29 PM.

  13. #87
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    AEM vs. Cobb intake system questions

    Quote Originally Posted by EJ257 View Post
    If you get to the point where hydrolock is a serious concern, you're an idiot and you deserve it.
    You calling Jimmy an idiot?
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  14. #88
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    Quote Originally Posted by nopistons93 View Post
    OK OK, instead of just saying stuff randomly, as you, EUROWRX22, are doing, let us take a logical look at this.

    PV=nRT, where P=pressure, V=volume, n=# of moles of gas, R=gas constant (related to Boltzmann's constant, in which energy at the particle level is related to temperature), and T=temperature.

    So, as T decreases, assuming n is constant and, of course, R is a constant), what must happen to PV? Well, it has to increase if T is decreasing. What does this mean to your car? Well, as the temperature is decreasing, your able to jam more oxygen into your compression phase (as T rises, the density of the gas decreases due to density = m/V => V = m/density, and thus P(M/density) = nRT). Conversely, as your temperature increases, your turbine wheel must do MORE work (i.e. spin faster) to compensate for the decreasing amount of oxygen, which, at some point, will be unable to spin fast enough to keep up and your power will decrease.

    Where is some good proof? Here is a MS6, same tune, same exact setup, same DAY, with a 20 degree intake temperature change.



    It is clear to see that intake temperatures DO matter to overall power production in a turbocharged engine.


    -Joe Nye the Science Guy
    Last edited by Calvinball; 02-19-2013 at 03:37 PM.
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  15. #89
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    Quote Originally Posted by Rambo View Post
    You calling Jimmy an idiot?
    Rep for that. It's been too long.
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  16. #90
    Registered User twister8008's Avatar
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    AEM vs. Cobb intake system questions

    Does anyone have experience with the spt Sri?
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