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what is the air tempature inside the engine compar

This is a discussion on what is the air tempature inside the engine compar within the General Help forums, part of the LSx Technical Help Section category; what is the air tempature inside the engine compartment? the air temp. of air just before it enters the air ...

  1. #1
    Member qwik219d9's Avatar
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    99 ws6

    what is the air tempature inside the engine compar

    what is the air tempature inside the engine compartment?

    the air temp. of air just before it enters the air box? I'm estimateing it to be around 200 degrees.

    1 well respected member here wrote that every 10 degree's of cooler air thought the intake is whorth 1% HP increase

    I recently made the ram air hood functional it made a noticable differnce, so I need to know this air temp so I can calculate the increase of HP w/ real ram air.if it was 200 degrees w/ a 500HP motor then I just gained 65HP.

    500 HP w/ regular intake air at 200 degrees

    my intake air average temp 70 degrees so 130 degree drop =s 13% more power

    so on a 500HP engine I gain 65HP w/ a 130 degree air temp. reduction?

    65HP=13%X5hp
    sound about right? I do understand this increase will flucuate proporsionally w/ ambient temp.
    comments

  2. #2
    Senior Member tatertot91's Avatar
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    i think you're looking at this the wrong way
    can see 10hp gain but not 65

  3. #3
    Member qwik219d9's Avatar
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    silver
    99 ws6

    major HP increase

    I have noticed a major HP increase w/ my functional & sealed ram air.

    the air outside the engine compartment must be alot cooler than the air inside the engine compartment.

    so I would like to calculate my HP increase.

    I have also observed much lower RPMs at cruising speed on the expressway w/ the functional ram air.

    about a 400-500RPM decrease at the same speeds.

    here's a image of the sealed air box and the ducking I made I have read that w/ this type of intake the air becomes presureized at 60MPH and increases the presure the faster you travel.
    Last edited by qwik219d9; 05-01-2010 at 04:30 PM.

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    the F-bodies do not take air from inside engine compartment,but from in front of the radiator.the ram air dose help alot.

  5. #5
    Senior Member tatertot91's Avatar
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    no offense, but 400-500 RPM drop because of ram air doesn't make sense. Motor has to spin so fast to make the car move at a certain speed, HP has nothing to do with it.

  6. #6
    Smiles for 9.5 Years cammed goat's Avatar
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    I think OP would have to do some datalogging with a laptop and tuning software to find out what the temp going into the airbox would be. I don't think the air would be 200 degrees as the outside air goes directly into the airbox which is directly in front of the engine.

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    Senior Member tatertot91's Avatar
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    Quote Originally Posted by cammed goat View Post
    I think OP would have to do some datalogging with a laptop and tuning software to find out what the temp going into the airbox would be. I don't think the air would be 200 degrees as the outside air goes directly into the airbox which is directly in front of the engine.
    :agree: no way doe the engine suck in 200 degree temps

  8. #8
    Member qwik219d9's Avatar
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    silver
    99 ws6

    150 air into air box

    OK maybe the 200 degree was a tad high so I'll calculate for 150 degrees

    still the 500HP engine 150 degrees compared to the 70 degrees (ambient temp) 80 degree temp. reduction =s 8% HP increase so

    8X5=40HP

    post #6 I'm compareing funcsional ram air to non ram air.
    Last edited by qwik219d9; 05-02-2010 at 06:04 AM.

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    Member qwik219d9's Avatar
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    silver
    99 ws6

    fog light covers

    Quote Originally Posted by tatertot91 View Post
    no offense, but 400-500 RPM drop because of ram air doesn't make sense. Motor has to spin so fast to make the car move at a certain speed, HP has nothing to do with it.
    I made fog light covers at the same of RA so the RPM drop is a result of both mods, have'nt tested each mod individually.



    Last edited by qwik219d9; 05-02-2010 at 06:15 AM.

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    Senior Member tatertot91's Avatar
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    Quote Originally Posted by qwik219d9 View Post
    OK maybe the 200 degree was a tad high so I'll calculate for 150 degrees

    still the 500HP engine 150 degrees compared to the 70 degrees (ambient temp) 80 degree temp. reduction =s 8% HP increase so

    8X5=40HP

    post #6 I'm compareing funcsional ram air to non ram air.
    I think you should remove your ram air setup and check your IAT temps, then hook it back up and see the difference. My guess is you won't see much cooler temps but increased air flow. Without ram air the air that comes in the motor is still coming from outside, it just isn't being forced into the engine like it would with a good flowing ram air setup.

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    Moderator Cutlass's Avatar
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    while moving, I bet there is less then a 10 degree difference between your sealed ram air and a stock ram air. They both function as cold air intakes.

  12. #12
    Senior Member tatertot91's Avatar
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    Quote Originally Posted by Cutlass View Post
    while moving, I bet there is less then a 10 degree difference between your sealed ram air and a stock ram air. They both function as cold air intakes.

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    Smiles for 9.5 Years cammed goat's Avatar
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    Maybe wrap the airbox with insulation?

  14. #14
    Senior Member tatertot91's Avatar
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    Quote Originally Posted by cammed goat View Post
    Maybe wrap the airbox with insulation?
    lol bag of ice in the air box ftw!

  15. #15
    Senior Member tatertot91's Avatar
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    Quote Originally Posted by qwik219d9 View Post
    I made fog light covers at the same of RA so the RPM drop is a result of both mods, have'nt tested each mod individually
    Missed this post but HP and Aerodynamics do not affect what speed you engine has to spin to maintain a constant speed, that's all gearing

  16. #16
    Smiles for 9.5 Years cammed goat's Avatar
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    Quote Originally Posted by tatertot91 View Post
    lol bag of ice in the air box ftw!

  17. #17
    Member qwik219d9's Avatar
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    silver
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    stock RA has a 1" opening mine is sealed

    Quote Originally Posted by tatertot91 View Post
    I think you should remove your ram air setup and check your IAT temps, this would be a hassle because it's gluded in preamentally then hook it back up and see the difference. My guess is you won't see much cooler temps but increased air flow there is diffenitly increased airflow it's actually presurized at 60MPH ? would explain the major increase in HP. Without ram air the air that comes in the motor is still coming from outside, it just isn't being forced into the engine like it would with a good flowing ram air setup.
    Quote Originally Posted by Cutlass View Post
    while moving, I bet there is less then a 10 degree difference between your sealed ram air and a stock ram air. They both function as cold air intakes.
    yes however the stock RA has a 1" opening that will allow hot inside air to mix w/ the outside cooler air.
    this 10 degree differnce only =s 5HP acording to my calculations it feels like alot more to me.

    I guess the only real test will be at the track to see if I have reduced the 1/4 time
    Last edited by qwik219d9; 05-02-2010 at 08:40 AM.

  18. #18
    Member JRENIGAR's Avatar
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    hp tuners showed a 15 deg reduction at crusing speeds when the fra mod was done to my car.

  19. #19
    Member qwik219d9's Avatar
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    7.5HP increase

    Quote Originally Posted by JRENIGAR View Post
    hp tuners showed a 15 deg reduction at crusing speeds when the fra mod was done to my car.
    what type of fra do you have I see a 99 Camaro in the sig.?

    is it sealed like mine?

    did you're RPMs lower at expressway speeds?

    w/ a 15 degree drop in temp. acording to my calculations is a 7.5HP increase

    usally w/ a small increase like 7.5 you don't get the seat of the pants feel.

  20. #20
    Member c5z28's Avatar
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    There is a point of minimal returns. Cold (I mean cold air) will not mix as easily as warm air does with fuel in the chamber resulting in a incomplete combustion. It helps but you figure once the car is moving the turbulent air isn't going to be as hot as if it was sitting around. S/c setups certainly see gains but there intake charge is a lot hotter.

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