GM Performance Parts Air Intake

Discussion in 'Performance & Fuel' started by Wolfman217, Aug 1, 2012.

  1. Wolfman217

    Wolfman217 New Member

    Hey everybody,

    I ordered the GM Performance Parts Air Intake for my 2008 5.3L GMC Sierra 1500 and I was wondering if anybody knew what the horsepower gain was with this specific air intake?

  2. Sierraowner5.3

    Sierraowner5.3 New Member

    i have no idea, but let me know what you think of it, may get one for mine.

  3. Skippy

    Skippy New Member

    As with any CAI, without additional performance mods, you'll likely grab 1-3 HP in the rear wheels. This is true of pretty much any stock vehicle these days, despite the fun claims of "DYNO'd results!" It's not much, but frankly, you'll REALLY appreciate the sound quality improvement when stomping the pedal.

    DYNO results will vary by several percentage points per run, and almost always are higher the second time you run a system (stuff is heated up and warmed up engines perform better). Meaning you can do a cold run, quickly swap a CAI into the mix and instantly see 9HP gains, only a portion of which actually is provided by the CAI. Yeah, you can "get" DYNO results that show 8-15 HP gains, but unless you actually have a system that is starved for air, you're not likely to see the outlandish claims published by CAI manufacturers. You-tube is even worse!

    Please don't let that slow you down. I LOVE the CAI's. And other than a performance tune (which will gain you a HP per $10-$15 spent usually), most mods will gain you 1HP at the rear wheel for every $50-100 you spend. Want an extra 100 HP? Looking at $5K plus usually. (including labor install charges, of course!) The CAI fits right in line with that with inexpensive models running about $125 -150.

    Man, you are gonna LOVE the sound quality. It'll be throaty enough, you'll swear it's making an additional 20HP. :great:

    Last edited: Aug 9, 2012
  4. darnie1987

    darnie1987 New Member

    the main reason you get a cold air intake is for cooler, less restricted air. although you may only see 8-12 hp difference it will run better, better throttle response and will preform better under a load. If you plan on doing other upgrades such as exhaust and a tune the all work together as one solid unit...
  5. RayVoy

    RayVoy Active Member

    Ya know, if we were talking about a '70s, or early '80s truck, with a carb (or even tbi) and the old fashion round filter in the flat can on top of the carb, the flat can that had the short snorkel and pulled hot engine compartment air into the vehicle, I agree, with a CAI, you would see a hp gain.

    However, the newer trucks use a filter box mounted to the front corner of the truck. The filter box is open to the "cold" behind the radiator. Factory trucks already have cold air access.

    The performance version, will only provide a low restriction filter and a smoother flowing duct between the filter and the throttle body.

    It will sound a lot better, but hp gains will not be much, and, only at wot.

    Having said all of that, I would love to have one the sound is the thing.
  6. darnie1987

    darnie1987 New Member

    id have to say that i dont agree with all stated. although the stock set up pulls air " out of the wheel well'' it also has alot of noise reduction and restrictions also the box gets heat soaked causing the air to be heated. if your cruising down the highway the under the hood temps wont be as great but anyone who drives in town or in stop and go traffic will have so good heat under the hood. i wish i still had my logs but i have a plx set up that monitors the air intake temp mine changed alot :) just my 2 cents...
    Last edited: Aug 10, 2012
  7. darnie1987

    darnie1987 New Member

    your best bet is to do intake, exhaust, and a tune they all work together and with all 3 you will see a greater gain they feed off eachother
  8. RayVoy

    RayVoy Active Member

    We're all throwing in our 2 cents worth, that's what makes these conversations fun, haha.

    I agree completely with the air flow restrictions and I know there is a gain from that.

    But, I don't know about the box getting heat soaked (it probably does), but a lot of the CAIs use the factory box. In fact, some manufactures want you to remove the factory cover and seal the box with the hood.
  9. darnie1987

    darnie1987 New Member

    if u have or can get ahold of a temp gun hit the intake box some time. if i can find the article ill post it on here
  10. RayVoy

    RayVoy Active Member

    Not arguing over temps, just saying if the factory box gets heat soaked, what keeps the CAI boxes from the same problem?

    I've never held one in my hands, but the walls (in pics and on E-bay) just look like single layer plastic, or steel. I'm just asking, what keeps the after market boxes from getting heat soaked?

    I'd love to have one (and the sound alone, may be enough to convince me, and, I like the way they look under the hood), I would just like to understand the power gain claims.
  11. the phantom

    the phantom New Member

    The intake tube on my 2011 ran all across the top of the engine under the cover. I would think that eliminating that with a CAI and having the air go directly from the filter to the intake would reduce some of the "heat soak" thats spoke of. Just my .02
  12. darnie1987

    darnie1987 New Member

    The ebay CAI actually work pretty much just as good as a $500 unit. im running a full out airaid CAI and it ran me about $400 when i have buddies in 10 second trucks running ebay ones. honestly alot of the gains are going to be under a load and WOT. thats where u will see were the less restrictive and cooler air will shine. plus like i was say n on the high way your temps will be cooler since your moving how i have mine ran.... i have the tube, then made a custom stainless box, and the cloth like materiel behind the radiator on the passengers side i pulled that out and my intake sucks " from an angle" from behind the front grill. i did this and my temps crusing around dropped about 12-16 just crusing
  13. darnie1987

    darnie1987 New Member

  14. RayVoy

    RayVoy Active Member

    Again, I don't mean to be argumentative, but my stock air box pulls air from the front of the truck, behind the headlight assembly.

    This is the point I'm trying to make, NO TOP. How can that be a "cold air intake", when the top is open to the hot engine compartment air.

    I'm sorry, I don't get it.

    1/4 mile guys are using a real "cold" intake, they will surround the air box with ice, resulting in a very cold intake (resulting in a denser charge, providing more O2 ).
  15. darnie1987

    darnie1987 New Member

    haha i quit.... i get what ur saying but unless i could show u hands on i dont think ull see what i mean. and yea they cool the intake because u cant hot lap cars. but they dont run with it iced just between runs.

    all these guys open box and seem to be do n alright ;)
  16. Skippy

    Skippy New Member

    While I prefer a sealed box design, it's actually not as "open" as you think. The boxes have sidewalls and a rubber seal along the top. When the hood is closed, the hood creates the "top" of the box sealing against the sides. It's generally got a few cracks here and there, but they seal pretty well against the hood (forcing most air flow through to take cooler air not coming off the engine, and not from the top under the hood.).

    Even with more exposed filters, the larger cone enables far more volume of air to enter the intake. Airrade, K&N, and others do an OK job... but at the same time, the actual gains are minimal. CAI's are typically purchased as a cheap bolt-on that adds sound qualities not available in the "box" and the designs commonly are made to catch the eye when you open the hood. People like them that way.

    Your stock box that has a 4-inch opening near your headlight isn't going to provide the airflow that a run-of-the-mill CAI (even if it's open completely). The volume offsets any heat difference, and when done correctly, a good CAI ALSO draws cooler air from similar locations (look at the Volant applications, for example).


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