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Old 15 Mar 2010, 12:10 pm
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Default Throttle Body Spacer?

Throttle Body Spacer? Do they do anything? Any better MPG? A tad more horsepower? I was just wondering I have read mixed things with them, it seems like a easy cheap mod for a non turbo. So if you can gains a few ponies and eek out a small MPG gain it would seem to be worth it. Enlighten me of great keepers of the sacred PT scrolls of knowledge
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Old 15 Mar 2010, 08:20 pm
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Default Re: Throttle Body Spacer?

Waste of money, period. Works on a carburetor but won't do anything for your PT. Please do a search on this forum for "spacer", or "throttle body spacer" .
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Old 15 Mar 2010, 10:27 pm
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Default Re: Throttle Body Spacer?

Quote:
Originally Posted by CREWZIN View Post
Waste of money, period. Works on a carburetor but won't do anything for your PT. Please do a search on this forum for "spacer", or "throttle body spacer" .
I did, and some guys said they got some results with it and some didn't.
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Old 16 Mar 2010, 06:11 am
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Default Re: Throttle Body Spacer?

OK then. Buy yourself one and come back and join one side or the other and let us know. It makes a great paper weight if it doesn't work.
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Old 16 Mar 2010, 08:16 am
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Default Re: Throttle Body Spacer?

Quote:
Originally Posted by CREWZIN View Post
OK then. Buy yourself one and come back and join one side or the other and let us know. It makes a great paper weight if it doesn't work.
Yeah some off those polished aluminum ones are pretty sharp it would make a nice paper weight or necklace. Sorry about asking a newbie question, been on enough forums to know it sucks to answer the same question over and over again. Just try to remember what's old to you is all new and exciting to me and the other PT newbies. Also this forum is not that easy to find information it's very time consuming.

I appreciate your advice and plan on taking it, I don't have a 100 bucks to waste.

Last edited by Dino; 16 Mar 2010 at 08:25 am.
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Old 16 Mar 2010, 08:48 am
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Default Re: Throttle Body Spacer?

I don't mind answering the same questions but it is nice to see the newbees coming on to the forum that say "I've searched and can't find...."

Back to the spacer.


One of the most knowledgeable persons I know, that has his own shop once looked into the spacer. Ran tests and then contacted the manufacturer for information asking about the advantages of the spacer on a fuel injected engine with a couple feet of intake. How the swirling of the mixture could possibly stand up to the length of the intake, how gas mileage can be improved and asked for test results.

The answer from the manufacturer was that improvements in performance couldn't be measured and that owners had testified of greater fuel mileage. "couldn't be measured", what does that tell you? You put it on a dyno and there's no improvements, and tell me how you drive when you put something on the car to improve gas mileage. Consciously or Unconsciously your gonna drive easier because you were worried about gas mileage to begin with so to prove to yourself you didn't waste $100 on a piece of metal with a hole in it.
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Old 16 Mar 2010, 09:03 am
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Default Re: Throttle Body Spacer?

Thanks Crewzin for the info, one question when you say several feet of intake I'm confused aren't you putting it on at the beginning of the intake. These are the directions for the Helix throttle body spacer. What the heck is the theory behind swirling air anyway? Why would it make a difference if the air was swirling?

http://www.smartchamp.com/Clarion/Im...elix/24035.pdf
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Old 16 Mar 2010, 09:18 am
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Default Re: Throttle Body Spacer?

Yes, that's the point, the swirling air is supposed to: (quote) "The unique "Helix Bore" causes a spinning action of the incoming air charge as it passes through the throttle body. This beneficial air-charge carries into the combustion chamber, producing a super-atomized mixture and resulting in tremendous gains in mid-range power, torque and fuel efficiency."

But what really happens to the swirling air after it passes through the TB and has to go about 4 feet through 4 different intake passages before it gets to the combustion chamber? It's lost before it can do anything. Remember when the carburetor was right above the short ram intake on V8's? The spacer does work there proven on countless cars at the drag strips.

Here's a good forum on the subject:

Throttle Body Spacer...Does it REALLY Work?
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Old 16 Mar 2010, 09:28 am
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Default Re: Throttle Body Spacer?

Thanks for the explanation and the link Crewzin, your the best, a walking knowledge base of PT information. And I appreciate your time.

Since I don't have a V-8 and can't imagine putting one in a PT the spacer sounds useless, although back in the day we did put one in a Vega a V8 that is, and somehow the Vega still managed to be slow considering.

Last edited by Dino; 16 Mar 2010 at 03:36 pm.
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Old 18 Mar 2010, 09:19 am
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Default Re: Throttle Body Spacer?

Great explanations, easily understood for the newbie

What is the purpose of a throttle body spacer? | Answerbag


Throttle body spacers are aftermarket devices that purport to increase horsepower in a variety of ways. The efficacy of this modification depends largely on the engine it is applied to and the engine's factory shortcomings.
Placement

TB Spacers are designed to be placed between the throttle body (the large butterfly valve that controls airflow into an engine) and the intake plenum onto which it is bolted.
Marketing

According to manufacturers, TB Spacers make power through better fuel atomization, which is accomplished by creating a "tornado-like" swirl in the intake manifold.
The Tornado Effect

Air-swirl effects tend to benefit engines with throttle-body injection more than those with multiport injection, since multiport systems use a dry intake manifold that does not contain any fuel droplets to atomize.
Plenum Effects


Throttle Body spacers make the majority of their power by increasing the volume of space between the throttle body and intake runners. This gives the engine more unhindered air to tap under high-demand situations.
Cost and Consequence

Throttle body spacers are worth a few horsepower on some older cars, and those newer multiport systems that came from the factory with an under-sized plenum. Bear in mind, though, that a $250 billet-aluminum spacer probably isn't going to make much if any more power than a $35 plastic one.



reat Answer

Professionally Researched. (What's this?)
Professionally Researched

This great answer was researched and sourced by a professional writer, as well as copy-edited and fact checked by a professional copy-editor. This isn't a replacement for the combined knowledge of our tremendous community - it's an addition! We hope you'll find these professionally researched answers useful, and it will encourage you to ask and answer even more!

Throttle body spacers are a prime example of modifications that work quite well on some cars and not at all on others. The efficacy of this simple mod depends largely upon the engine, and the extent to which it has been otherwise altered.
Location

TB Spacers fit in between the throttle body (main air valve of the engine) and the intake manifold plenum (the large space behind it).
Theory

Along with throttle body flow, an intake manifold's plenum size determines the reserve of air that an engine can call upon when required. A large plenum is crucial to making top-end horsepower.
Function

By moving the throttle body a little further out, a spacer can increase plenum size by as much as 20 percent on some cars.
Effectiveness

On unmodified, fuel-injected engines with sufficient plenum volume, many customers report that TB spacers make little to no difference in power.
Modified Applications

On engines internally modified for increased airflow (camshafts, larger valves, ported cylinder heads), throttle body spacers can make a crucial difference in power production.



Great Answer

Professionally Researched. (What's this?)
Professionally Researched

This great answer was researched and sourced by a professional writer, as well as copy-edited and fact checked by a professional copy-editor. This isn't a replacement for the combined knowledge of our tremendous community - it's an addition! We hope you'll find these professionally researched answers useful, and it will encourage you to ask and answer even more!

Throttle body spacers are a prime example of modifications that work quite well on some cars and not at all on others. The efficacy of this simple mod depends largely upon the engine, and the extent to which it has been otherwise altered.
Location

TB Spacers fit in between the throttle body (main air valve of the engine) and the intake manifold plenum (the large space behind it).
Theory

Along with throttle body flow, an intake manifold's plenum size determines the reserve of air that an engine can call upon when required. A large plenum is crucial to making top-end horsepower.
Function

By moving the throttle body a little further out, a spacer can increase plenum size by as much as 20 percent on some cars.
Effectiveness

On unmodified, fuel-injected engines with sufficient plenum volume, many customers report that TB spacers make little to no difference in power.
Modified Applications

On engines internally modified for increased airflow (camshafts, larger valves, ported cylinder heads), throttle body spacers can make a crucial difference in power production.
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