So what makes throttle body spacers not work?
All Star
Joined: Mar 2005
Posts: 820
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From: Jax Fl.
You would be better off saving the money to fix your plenum, then while you are in there cut the bottom 2" off the intake runners at ~60* angle. Then, if you have some spare time open up the restriction over your throttle plates, cut off the towers, and blend the openings on your TB. Do those things and you will see a night and day difference.
Record Breaker
Joined: Mar 2004
Posts: 1,977
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From: DuQuoin,IL.
[QUOTE=Laramie1997;1988318]
On our trucks, they do not work, and 99% of all fuel injected engines as well. Modern engines are port injected meaning that the fuel is sprayed directly into the cylinder and not the intake like above. In this case, spinning the air doesn't help. It does nothing to help the air to fuel ratio.
In port injection the fuel is sprayed into the port, not the cylinder.
If it's sprayed into the cylinder or combustion chamber it is direct cylinder injection.
Not arguing, just trying to clarify.
On our trucks, they do not work, and 99% of all fuel injected engines as well. Modern engines are port injected meaning that the fuel is sprayed directly into the cylinder and not the intake like above. In this case, spinning the air doesn't help. It does nothing to help the air to fuel ratio.
In port injection the fuel is sprayed into the port, not the cylinder.
If it's sprayed into the cylinder or combustion chamber it is direct cylinder injection.
Not arguing, just trying to clarify.
In addition to what has already been said, another reason is just the design of the intake manifold. If you have ever seen the inside of the intake manifold of our trucks, it is obvious why they dont work. How would you expect the "swirling" effect that the TB spacer creates to stay in effect making the 60* bends that are in the intake manifold?
Record Breaker
Joined: Oct 2007
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From: Allentown, PA
The TBs that are already on our rams are 52mm holleys.
Professional
Joined: Jul 2009
Posts: 207
Likes: 1
From: South Texas
I saw a study that proved they did work...as long as they where 18 inches high, and you only looked at mpg......a 18 inch high tb spacer will save enough fuel to pay for itself ($119.95) in 6 years.....what a bargain!
Champion
Joined: Feb 2009
Posts: 3,416
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From: Bay Area, CA
Just wanna make sure, are you being sarcastic? If not then your out of your mind. Where is this study, I'd love to see it.
Veteran
Joined: Feb 2006
Posts: 292
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From: Central OH, USA
It was one of those Holley High-FLow EFI throttle bodies. Link: http://www.summitracing.com/parts/HLY-112-555/
Champion
Joined: Apr 2007
Posts: 2,831
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From: Miami, Fl
If you drive an older chevy you will be all over a TB spacer, and yes on the TBI and Carb motors it helps a bit, plus some run it for clearance issues
Like if you put a bigger TB and the blades hit the intake manifold so you put the spacer so the blades open all the way
Like if you put a bigger TB and the blades hit the intake manifold so you put the spacer so the blades open all the way
Professional
Joined: Jul 2009
Posts: 207
Likes: 1
From: South Texas
Google it. I saw the study, think it was done at WyoTech.