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Old 02-10-2014, 01:47 PM   #1
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Are throttle body spacers valid or bogus??

I am thinking of installing a TB spacer. Are they worth the $80 or so when it comes to performance or MPG??

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Old 02-10-2014, 01:56 PM   #2
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They do nothing.
Save your money.
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Old 02-10-2014, 02:20 PM   #3
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Makes a nifty paperweight!
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Old 02-10-2014, 03:16 PM   #4
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But still so many suckers willing to part with that cash but car savvy guys know they don't do a thing.
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Old 02-10-2014, 03:23 PM   #5
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What they do is add volume to your intake plenum. This has been shown to aide in cylinder filling at lower RPM, smooth out throttle response and lengthen the effective wave pulse of the intake charge.

Most OE manufacturers tune their intakes to certain RPM ranges. Therefore changing the volume of the intake would slightly alter the target operating range of the engine. How much it changes the range depends on the volume of the spacer and the power band of the engine.

I am currently making a 25.4mm (1") spacer to see if it will help smooth out the throttle response on my 65mm throttle body.

Are they worth $80.... no. Do they add any real Hp..... no!
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Old 02-10-2014, 10:16 PM   #6
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Good way to add ports for WMI, nitrous, vacuum, etc without modifying your intake manifold. For power, they don't do anything on an EFI car unless you're able to add some serious volume. Usually to do so, you'll be hitting the hood with your intake pipe on a Zetec.
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Originally posted by DrkKnight614
......hmm if that works then if i put a spinner on my butt hole and rip one will i be able to run faster. ...idiots
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