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  1. #1
    Sr. Engineer
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    Jun 2009
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    Post Info on Throttle Body Spacers

    This question comes up quite often in my PM box and emails, so I figured I would throw out my answers here.

    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

  2. #2
    Legend 2ToNe04's Avatar
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    well said

    i love the whistle though....not gonna lie

    2004 4.8| Custom Paint| Tint| De-badged| Shaved Tailgate| Rollpan| Smoked Tails| Color Matched| Lowered 5/8| Suede Interior| Color Matched Interior| Indash & TVs| Mids-Lows & 2 12" CVRs| 500 & 1100 Interfires| Soundeadener| Outlaw CAI| Magnaflow|
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  3. #3

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    Mine gets annoying. I did pick up a little better throttle response, but that was it!
    2005 Chevy Silverado Z71 in Black

    6" BDS Suspension Lift | 3" BDS Body Lift |17" Rock Crawler Stellies | 35" Cooper STTs | 4.56 Yukon Gears | AirAid CAI and TBS | Flowmaster 40s | HyperPAC Programmer


    2001 TJ Sahara in Sienna

    3.5" RE Suspension Lift | 33x12.50 Baja MTZs | D30/44 | ROKMEN Merc Front Bumper | Warn Rockcrawler Rear w/ Carrier | Warn M8000 Winch



  4. #4
    Jr. Engineer Jacqson's Avatar
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    Default

    Quote Originally Posted by masterfoxscout View Post
    Mine gets annoying. I did pick up a little better throttle response, but that was it!
    Yeah, all mine did was whistle so I got rid of it.
    2011 Chevy Silverado 3500HD, Dmax/Allison, Taupe Gray Metallic, Line-x over the Rail & Rockers, S&B Intake, Banks Monster Exhaust, Rigid Dually D2's, Cognito Leveling Kit, Cognito Steering Braces plus much more.

    "Suburban" There is no Substitute.:great:

    SOLD - My Loaded up 02 2500 Suburban.

  5. #5
    Sr. Apprentice VectraGT's Avatar
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    Default

    If you like the sound of a fake supercharger and want to make your truck "feel" faster, then a TBS is for you!
    JR
    2009 Silverado Z71, 5.3
    Under bottom coating
    Line-X bedliner
    Rhino Cat-back exhaust
    AEM Brute Force CAI
    more to follow


  6. #6

    Default

    You've raised a great point... as manufacturers work overtime to increase fuel mileage, many of yesterday's add-on solutions no longer apply to today's modern engines.

    Port Fuel Injection is a tremendous advance from TBI in both power and efficiency. Direct injection (now available on some Euro cars and many diesels) will be even better!

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