Blower Shop intercooler efficiency ???
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Blower Shop intercooler efficiency ???

  1. #1
    21' Daytona DaytonaTunnel's Avatar
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    Default Blower Shop intercooler efficiency ???

    What is the efficiency of my intercooler ?

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    Default 100 H.p.

    All depends what you have but I understand it is worth 75 to 100 H.P.

  4. #3
    21' Daytona DaytonaTunnel's Avatar
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    I've heard varrying #'s, but more interested in what peeps opninion of the efficiency is for DTD.

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    Senior Member TwinTurbo540's Avatar
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    Chris,

    Also have to consider boost level, water temp, air temp, what fuel. Your IC efficiency will never be a set number, it will vary from day to day depending on conditions and how hard you run it. It will be most efficent at the start of a hard pass but will taper off at the end some.

    Travis

  7. #5
    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by DaytonaTunnel View Post
    What is the efficiency of my intercooler ?
    most large air to water intercoolers are above 100% efficiency if that's what you're asking. most like to know for sure so they can run dyno sim programs with a approximate i.c. drop and efficiency. i've herd a guy mention on theyellowbullet.com that his roots intercooler under his 8-71 had a 1psi drop and a 110% efficiency, where he got those numbers is anyone's guess i'm sure a boat with nothing but cool water goin thru the i.c. is in that neighborhood at least.
    turbo style air to water i.c. that i've looked at lately "say" they have less than a 1/2lb drop in boost and over 150% efficiency when you use the proper size for the turbo its connecting too. only a before and after intake temp sensor will tell for sure, could be just marketing bs.

    Dare to be different, if it turns out great you can claim you planned it that way.

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    Thumbs up Intercooler Test

    I'm sure this will cause more questions than it will answer.
    Intercooler Test

    Base line Test 1 497cid with TBS 8-71 Supercharger to 6,000 RPM
    Boost Pressure 7.7
    Manifold Air Temp 190 degrees
    HP 840
    TQ 735

    Test 2
    Boost Pressure 7.4
    Manifold Air Temp 124 degrees
    Pressure above Cooler 7.6
    Temp above Cooler 142
    HP 870
    TQ 760
    Water Temp In 78
    Water Temp Out 80

    Test 3
    Boost Pressure 7.6
    Manifold Air Temp 106 degrees
    Pressure above Cooler 8.0
    Temp above Cooler 152
    HP 900
    TQ 787
    Water Temp In 78
    Water Temp Out 85.3

    The entire test was to measure things at the same manifold pressure. Drive ratio’s were changed to get as close as possible to the same manifold pressure. Air temp in the dyno cell was 91 degrees for all tests.

  9. #7
    mo balls than $cents$ IMPATIENT 1's Avatar
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    why does it say above intercooler? did you mean below it?

    Dare to be different, if it turns out great you can claim you planned it that way.

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    Thumbs up

    We measured both pressure and tempature on both sides. Above the cooler represents the air charge coming out of the blower. If you look at the base line test, the air charge was much hotter at 190 degrees. Then look at the air charge above the cooler on test 2. From this you can see that the air charge circulates through the cooler and back up to the blower.

  11. #9
    Member paradigm shift's Avatar
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    Quote Originally Posted by Boost Daddy View Post
    We measured both pressure and tempature on both sides. Above the cooler represents the air charge coming out of the blower. If you look at the base line test, the air charge was much hotter at 190 degrees. Then look at the air charge above the cooler on test 2. From this you can see that the air charge circulates through the cooler and back up to the blower.
    I know I always think of air flowing one direction through the motor but reality is valves open and close causing pulses. Are you saying during these pulses the air circulates through the cooler? I had not ever thought or heard this before so I am not doubting just trying to understand.

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    Senior Member VDRIVERACING's Avatar
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    Quote Originally Posted by paradigm shift View Post
    I know I always think of air flowing one direction through the motor but reality is valves open and close causing pulses. Are you saying during these pulses the air circulates through the cooler? I had not ever thought or heard this before so I am not doubting just trying to understand.
    The pressure in the manifold forces the air back to the blower. In other words, whatever is not used immediately is subject to being recycled in the blower. That's one reason it's important to have tight clearances so there is minimal blow by, so to speak, moving back into the blower.

    Without a cooler, the air just gets hotter and hotter. With a cooler, the recylced air is cooler going back to the blower.

  13. #11
    Member paradigm shift's Avatar
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    Quote Originally Posted by VDRIVERACING View Post
    The pressure in the manifold forces the air back to the blower. In other words, whatever is not used immediately is subject to being recycled in the blower. That's one reason it's important to have tight clearances so there is minimal blow by, so to speak, moving back into the blower.

    Without a cooler, the air just gets hotter and hotter. With a cooler, the recylced air is cooler going back to the blower.

    I guess maybe I do not fully understand BD post. I understand intercooling I just thought the air above the cooler and below the blower would be closer to the same temperature as base line test. From as you put it the recirculation or beating of air from the blower.

    My next build will include intercooler which in a big boat running long and hard should really help with heat soak or rising intake temperatures on extended runs.
    Last edited by paradigm shift; 01-26-2009 at 08:11 PM.

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    Smile Additional info

    I need to mention that these were all steady state tests on the dyno. No 4 second sweep test found here. We brought the engine to 6,000 RPM and held it for 15 seconds. It was my engine, so it seemed like 15 hours! The amount of fuel used during all testing was 110 gallons. We tested 3 other fin configurations as well.

  15. #13
    Cantard 71hallett's Avatar
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    Good post BD. Nice to see #s. Thanks
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

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    Default info

    Test 1
    Is a baseline without the use of an intercooler.

    Test 2
    Uses an intercooler.

    Test 3
    Uses a different intercooler.

    You can start to see how sensitive gasoline is to heat. Test 3 has nearly identical manifold pressure as Test 1, but makes an additional 60HP / 52 Ft.Lbs torque with a much lower intake tempature of 106.

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