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  1. #1

    Question throttle body spacer worth it?

    is a tb spacer worth the 100 bucks? which one do i go with? airaird,etc....
    who likes that whistle?
    please help a newbie

  2. #2


    i've heard from other chevy truck owners say that throttle body spacers are not worth spending money on. that all it really does is add a "whistle" and totally useless especially on Vortec engines.

    sorry to jump on your thread 1morepart. i too would like to hear from other members on this forum as well about their thoughts/opinions on TBS.

    Last edited by j-schmizzle; 04-15-2010 at 01:51 PM.
    2K Bowtie Silverado xCab 5.3L
    7" Fabtech Suspension Lift + 3" Perf Acc. Body Lift
    K&N Air Intake + Edelbrock Shorty Ceramic Headers + Flowmaster Super 10 Series dumped after muffler!
    Bridgestone Dueler 285/75/16 on stock rims
    SSBC Slotted Rotors & Pads
    HID Driving & Fog Lights

    (AR Bajas + ProComp 305/70/16) <-- seasonal set

  3. #3
    TrailLeadr's Avatar
    Join Date
    Jun 2005
    Coventry, Rhode Island


    Well the spiral shape actually has little to do with anything other than making noise. It may cause some extra turbulence, but nothing that's going to help.

    When you add a TB spacer what you are effectively doing is increasing the plenum volume. A larger plenum will basically make for a little more torque. Some people feel it and others don't. One main reason may be older more tired engines will notice the increase, while newer engines still get the bump in power it is less noticeable. It also depends on revisions made to intakes as the years go on. Newer revised intakes may not benefit as much as an older version of the same style intake, since after a point adding more space to the plenum will have the opposite effect and power could start to drop off.

    In my opinion, it's not worth $100.00. It's a block of aluminum machined to your TB size. It's not that special. It might be worth it for less money, say in the $50 range to see if you get any noticeable results.
    If you really wanted to make some more power and are willing to play with the intake and part with $100, you're better off to save up a couple hundred more and get a tuned intake from someone like Edlebrock or Holley, that is proven to make more power. The spacer is hit or miss, and should be considered a gamble.

    Keep in mind that the "Vortec" portion of the engine is in the heads not the intake.
    Last edited by TrailLeadr; 04-15-2010 at 05:49 PM. Reason: reworded
    Rhode Island

  4. #4


    tnx for the info. that was very informative

  5. #5


    thanks for the replies..would like to hear some more.

  6. #6


    What model year vehicle and Engine you running?

    I managed to snag a deal on my TBI spacer off eBay for $28 and free shipping.

    Can't say for sure what improvement it gave me specifically, because I did several performance upgrades all at once. Headers, dual exhaust, Cold Air Intake, Accel super coil and module.

    But since I had my TBI off to clean,and for the low cost, it was worth it to me.

    Never rush into any performance or appearance upgrades without taking the time to check out the bottom line.

    Hope this helps...
    Pavement sucks... :grrrrrr:

    1994 K1500 4x4 Ext. Cab
    PCM chip and Xenon 8000k bulbs bored over .050"
    balanced Crank, 10:1 compression
    Flat top pistons,cam,ported heads
    Option Racing Cold Air Intake
    Holley Throttle Body Spacer
    Accell Igition, 45kv coil
    FloTech Headers, no CATs, dual exhuast
    Goodyear Silent Armor A/T 305/70-16
    Pioneer SupertunerIII CD USB Bluetooth
    Kicker ZX200.2 ZX Amp
    Kicker Audio COMP 10" Subwoofer

  7. #7
    Master Mechanic Coolrado's Avatar
    Join Date
    Aug 2009
    Buffalo, NY


    I know on my engine they are worthless. I think it depends on the type of engine and probably depends on the type of throttle body and intake.

  8. #8
    Sr. Engineer
    Join Date
    Jun 2009
    San Diego, CA


    Throttle body spacers (TBS) came about back in the time when TBI engines were the craze. The TBS did indeed help the TBIs as they helped to improve atomization of the fuel by changing the flow of air as the fuel was sprayed before the throttle body. The gains are minimal but are still there.

    The TBS are a waste on the newer engines as the fuel is sprayed after the throttle body. The air is already "spun up" as it goes through the throttle body, so the TBS basically duplicates the effort. The TBS won't hurt your engine however, that being said, some folks wind up having problems with the spacer as it is one more thing to wiggle lose and cause leaks.
    Black Bear Performance- Custom Tuning Solutions

    Authorized EFILive and MAGNACHARGER seller

  9. #9


    thanks for the replies...i think i will keep my hundred and put it on something worth while
    2002 Chevy Suburban 5.3 L59 Flex Fuel

  10. #10
    Master Mechanic Silverado Junkie's Avatar
    Join Date
    Feb 2010
    Lead Hill, Arkansas


    Good choice, they are all right. They only work on TBI motors like mine. Ive got a PowerAide throttle body spacer and did notice a slight improvement in how fast my motor revved and thats about all it did besides make a cool whistle sound.
    1995 Silverado,Z71, 3-inch lift,2-inch leveling kit, SkyJacker Suspension, short ram-air intake, throttle body spacer, MSD ignition coil, straight pipes

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