1. Welcome To GMTruckClub.com!

    The #1 Chevy Truck Forum Online
    Online since 2004, we are the #1 Chevy Truck & SUV forum and user community. If you have any questions about your Chevy or GMC Truck, SUV or Crossover, or just want to connect with other GM owners and enthusiasts around the world, you've found the best place on the internet to do that.

    Join Today ~ It's Free
    Registering is Free and Easy! Hope to see you on the forums soon!

Throttle body spacers?

Discussion in 'Performance & Fuel' started by thekingsphance, Nov 23, 2008.

  1. dobey

    dobey Rockstar 3 Years 100 Posts

    Get a tune to tone the torque management down a bit, and tighten up the shifting. And turn off the caps lock. :)
  2. Jimmeh

    Jimmeh Epic Member 5+ Years 500 Posts

    I did notice a whistle that made it sound like I have the smallest turbo known to man.
  3. sierra11

    sierra11 Rockstar 100 Posts

    Haha yeah I use to have one several years ago on my old dodge and all I got was a whistling turbo
  4. moogvo

    moogvo Epic Member 5+ Years 1000 Posts

    That whistling sound is created by friction of the air dragging across the thing and is actually hurting your performance by slowing the air down as it passes through.
  5. dobey

    dobey Rockstar 3 Years 100 Posts

    More than likely it's actually created by a leak in the seal between the spacer and the intake, or between the spacer and the throttle body; sucking air in and causing the whistle sound.
  6. moogvo

    moogvo Epic Member 5+ Years 1000 Posts

    The "turbo whine" is caused by the protruding teeth or "threads" on the inner edge of the spacer. A vacuum leak large enough to make that sound will cause a massive loss in performance not only at idle, but also at highway speeds with bucking and misfiring. The whistle sound is engineered in to make the spacer appear to be doing something. A TBI spacer on its own will not increase performance and in many cases, it will degrade performance, even to the point of turning the check engine light on.
  7. dobey

    dobey Rockstar 3 Years 100 Posts

    You do not need a large vacuum leak to create a whistle sound. A pinhole that you can't even see is enough to suck air in and create a whistle sound; and it won't cause any noticible performance degradation or a CEL. I've had it happen before on a 25 year old car with a stock engine and air intake. The rubber for the intake hose was old and had some very tiny stress tears from repeated removal and install over the years, as it has to be twisted in just the right way to fit both ends of it to the filter housing and the throttle body, while stuffing the ridgid PVC tube into it on the underneath where you can't even see it. It would be fine at idle or cruise, but when stepping on the throttle to accelerate or pass it would sometimes whistle. It was caused by air getting sucked in between the rubber and PVC tube, and didn't cause any performance issues, nor any bucking, misfires, or a CEL. It was just annoying.
  8. Jimmeh

    Jimmeh Epic Member 5+ Years 500 Posts

    Considering the fact that with removal of the TB spacer the whistling sound goes away, I am pretty sure that is what is creating the noise.

    Unfortunately for me, I just recently unloaded my original air box WITH the fasteners to the throttle body going with it. Now I am stuck with the spacer until I get new bolts, and they are not high on the priority list anyway.
  9. Skippy

    Skippy Member 2 Years 100 Posts

    Nikkeshelton, your acceleration problem is very likely due to GM's Torque Management. Basically, when you stomp the pedal, it can take up to 4 seconds to get full power. They do this to protect the driveline from jarring. It's a widely held opinion though, that you can remove some of the Torque Management (also known as TM) and get a whole bunch of throttle response in return.

    I pulled 50% from my 2006 and it was an amazing difference. I then fully upgraded my transmission, and removed all that I could. Even more improvement from that.

    Handheld performance tuners or custom tunes can do this for you. It's handled through the PCM.

    Also, consider cleaning your throttle body, if you've found your throttle response has deteriorated over time.

    The link is an article I wrote on the subject (cleaning your throttle body). Cheers.

    http://www.ehow.com/how_8007216_perform-throttle-body-maintenance.html

    -Skippy
  10. nikkeshelton

    nikkeshelton Member 2 Years 100 Posts

    Thanks! I'll look into both solutions!

Share This Page