Air Intake Modifications??
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Cadillac Catera and Cimarron Forum Discussion, Air Intake Modifications?? in Past Cadillac Vehicle Discussion; The air intake system on this car looks like it's 3 times as bog as necessary. Why do the pipes ...
  1. #1
    w98seeng is offline Cadillac Owners Fanatic
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    Air Intake Modifications??

    The air intake system on this car looks like it's 3 times as bog as necessary. Why do the pipes run down the front of the engine and back up again?

    Would it be better if there were less bends and shorter pipes in the system?

    Would something like this work? It's just a mock-up I did with a paint program. Of course all necessary sensors and plugs would be installed in the pipes.

    Thanks,

    Ian

    1.jpg

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    MoistCabbage's Avatar
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    That would be a HOT air intake. Hot air pulled from under the hood is less dense than the cool air pulled in by the stock intake ducting (which is already CAI). Warmer intake charge = less power and fuel economy.

    You could fabricate a true CAI with a more direct route to the intake manifold, but in all likelihood, the stock setup can flow more air than the engine can use at WOT, at redline. You could always hook up a vacuum gauge to measure any vacuum in the ducting, you'd probably never see the needle do much more than twitch.

    Also, realize that even the freest flowing intake only makes a difference at WOT. Any other throttle angle and the TB butterfly valve is the greatest restriction.

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    JohnJJO's Avatar
    JohnJJO is offline Cadillac Owners Fanatic
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    That mode is crazy money waist...

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    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    But the 4 K&N stickers under the hood would be good for at least 20 HP at idle.

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    w98seeng is offline Cadillac Owners Fanatic
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    Re: Air Intake Modifications??

    OK, what if the air filters would be directed under the rad support, in front of the air filter box, where the stock air inlet is?

    Ian

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    kaustein is offline Cadillac Owners Enthusiast
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    Re: Air Intake Modifications??

    Sucking water would really help the gas mileage out. If it doesn't come from the factory like this, don't do it.

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    MoistCabbage's Avatar
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    Reread my post. Even with a more directly routed CAI, there would in all likelihood be no performance increase.

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    elvin315 is offline Cadillac Owners Connoisseur
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    Re: Air Intake Modifications??

    I spent a lot of time researching that set-up. It's called the Dual-Ram (97-98) and the Multi-Ram (99-01) and its purpose is to optimize the airflow to the cylinders for max Torque at low RPM and HP at high RPM. Read about it in my post:

    http://cateraowners.forumotion.com/t...-resonator#893

    From what I learned I made the only mod I felt would remove some of the airflow restriction but preserve the benefits of the factory set-up. I removed the snorkel ahead of the radiator, the tubing to the air filter housing, and the housing itself replacing it all with a K&N filter cone. Yes it sucks in hot air but from what I read it's an acceptable compromise. The car seems to respond to the throttle better and the intake growl sounds great.

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    MoistCabbage's Avatar
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    As posted, at anything other than WOT, any minor restriction the intake ducting may pose is irrelevant, the butterfly valve/s are the restriction. You cannot improve throttle response with an intake.

    Spending time or money on modifications has a strong placebo effect.

    That said, you DO get more noise and under hood bling. If that's what you're after, go for it.

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    w98seeng is offline Cadillac Owners Fanatic
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    Re: Air Intake Modifications??

    Quote Originally Posted by MoistCabbage View Post
    As posted, at anything other than WOT, any minor restriction the intake ducting may pose is irrelevant, the butterfly valve/s are the restriction. You cannot improve throttle response with an intake.
    So everyone who is putting in less restrictive air intakes without going to a larger throttle body is wasting their money?

    Ian

  12. #11
    MoistCabbage's Avatar
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    If their stock intake ducting isn't restrictive, or their engine is otherwise stock? Yes.

    A 5 inch exhaust system on a diesel truck with 1.5 inch tail pipes won't do much good. Same idea.

    You could run NO intake or air filter, and partial throttle power output would be unaffected.

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