Throttle Body Spacers

Discussion in 'Performance & Fuel' started by MTM, Apr 3, 2012.

  1. MTM

    MTM Rockstar ROTM Winner 100 Posts

    Okay just another thing I'd like to throw out there for everyone to consider. This truck sees a decent amount of highway and it seems to me that with a cold air intake and a spacer at highway speeds you'd have to see an increase somewhere. I'm not by any means looking for a huge amount of power out of this or a huge amount in mileage increase.
  2. ejohnson03

    ejohnson03 Epic Member 5+ Years 1000 Posts

    Added one as part of a total Engine Performance upgrade, so no specific changes or performance gains to directly link to the TB spacer.

    If you are going through the process of making upgrades as are listed below, then adding a couple bucks ain't no big deal.

    That's just my 2 cents worth...
  3. MTM

    MTM Rockstar ROTM Winner 100 Posts

    Is there any difference between all the different brands of the spacers? Or are they pretty much all the same?
  4. moogvo

    moogvo Epic Member 5+ Years 1000 Posts

    Chair... Moon. It's as simple as that. Does it matter whether the chair is leather or wood. The end result will be the same. There are no magical bolt on products that are going to make any real difference in and of themselves. Your engine is nothing more in the end than a big air pump. You get more air in and more air out to make any additional power, period. Adding a spacer not only has no way of getting any more air into the system, but the laws of physics actually dictate that such a device would add length to the path of the air and therefore cause friction loss due to the additional surface area of the spacer... ESPECIALLY if it is one of those ones with threads cut into it to "twist the air". Hand one of those to a smoker and have him blow smoke through it. You will then see that the air is not spinning out the other side.

    But what about a cold air intake? You can bore a manhole sized hole in your intake and force gobs of air into the system, but if the air doesn't have the means to escape (out the exhaust) then your new and improved hole won't help you either. Think about a 5 inch fire hose hooked to a hydrant with 150 psi of force going in from the hydrant. Let's also suppose that you are running a length of 100 feet of 5 inch hose. With the other end of the hose open, you will only get about 135 psi at the other end because of the friction loss in the hose. Now, let's adapt it down and hook a garden hose to it. You will still get 135 psi, but you will have no volume. Instead of flowing 5 gallons per second, you are maxed out at 1 gallon per minute. Make sense?

    Your engine will only pull in as much air as it can get rid of.
    Last edited: Apr 4, 2012
  5. MTM

    MTM Rockstar ROTM Winner 100 Posts

    Thanks for that write up that pretty much says it all. think ill look into some other things to mess with.
  6. mfleetwood

    mfleetwood Epic Member 5+ Years ROTM Winner 5000 Posts

    Since you're looking around for something else to mess with and Tom did such a great job with the fire hose analogy, I'm thinking an exhaust will go nicely with your CAI...:glasses:.....maybe?
  7. SurrealOne

    SurrealOne Former Member ROTM Winner 1000 Posts

    There is no maybe about it ... if he chooses wisely. :) And yes, [MENTION=12002]moogvo[/MENTION] did one heck of a job with a stellar analogy; props to you, sir. :great:
  8. moogvo

    moogvo Epic Member 5+ Years 1000 Posts

    Wow! Thank you! I expected to get flamed over that. There are guys that swear by those things and they will fight you over it, but you can't argue with simple physics! LOL!
  9. SurrealOne

    SurrealOne Former Member ROTM Winner 1000 Posts

    My background is in engineering, so you got no argument from me. :)
  10. MTM

    MTM Rockstar ROTM Winner 100 Posts

    I'm actually a college student in engineering so no it all makes since there's no argument here. And i do have an exhaust it's a 3 1/2'' down pipe back into a 5'' tip

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