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Old 08-29-2011, 09:49 PM   #1
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Throttle body spacer??

i was wondering if adding a throttle body spacer actually boosts performance a little or are they just a waste of money? i have a airaid cold air intake system and i was just looking for a few more horses.

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Old 08-29-2011, 09:52 PM   #2
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I wouldn't waste your money, but that's just me

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Old 08-29-2011, 10:03 PM   #3
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Throttle body spacer does nothing for a port fuel injected engine. Carbureted you might pick up a few ponies.
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Old 08-29-2011, 10:15 PM   #4
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For the type of throttle body system the TJ uses, which only passes plain air, a spacer is useless and it does nothing at all. Spacers help when placed under carburetors and the older throttle body injection systems used well before the TJ came out but that's it.
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Old 08-30-2011, 03:45 AM   #5
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ide reccomend looking into a larger throttle body for a little more pep. Cleaning out the carbon build up in your manifold/throttle body also adds more pep. Also if you dont already have a cat-back that can give some change to not needing to down shift as often for smaller hills.
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Old 08-30-2011, 06:29 AM   #6
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What everyone said above is true... I decided to 'test' this theory out and dropped $33 on one. To my surprise.... they are right. Not worth the metal they are cut from. Granted some are 'blingy' , anodized, swirl cut, polished....and MUCH MORE $$$$.... doesn't matter... no worky!!!

Oh... they look good.. if that counts... LOL!
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Old 08-30-2011, 12:59 PM   #7
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Yep as stated by all.
Send me the money, and I'll tell you your Jeep has more power and speed.
Heck you send me what TnDz spent and I'll even put it in writing for you.
You'll get more out of sending me the money then the plate will do for you.
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Old 09-02-2011, 07:02 AM   #8
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I have a Trick Flow throttle body spacer installed.it'ss made of a phenolic material, not aluminum,there for it isolates the heat from the throttle body and the air charge is cooler going in. the engine runs alot smoother and throttle responce is snappyer. it did pick up in the gas milage department.I'm pretty happy with it. I got the spacer from Sumit Racing. Trick Flow is the company that makes Aluminum Racing Heads for NASCAR and the NHRA they know thier stuff and are not interested in gimicks. how ever they do not make one for the 4 cylinder engine.only the 4.0 6 cylinder engine.
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Old 09-02-2011, 09:20 AM   #9
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it'ss made of a phenolic material, not aluminum,there for it isolates the heat from the throttle body and the air charge is cooler going in.
Uh, no.

The throttle body is not that long of a passage. The air passes through it to quickly to pick up or lose any heat.

It ain't doing squat.
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Old 09-02-2011, 09:35 AM   #10
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I have a Trick Flow throttle body spacer installed.it'ss made of a phenolic material, not aluminum,there for it isolates the heat from the throttle body and the air charge is cooler going in. the engine runs alot smoother and throttle responce is snappyer. it did pick up in the gas milage department.I'm pretty happy with it. I got the spacer from Sumit Racing. Trick Flow is the company that makes Aluminum Racing Heads for NASCAR and the NHRA they know thier stuff and are not interested in gimicks. how ever they do not make one for the 4 cylinder engine.only the 4.0 6 cylinder engine.
As said above, spacers don't do a thing when placed under the air-only type of throttle body the TJ uses. It's well known spacers only help when placed under carburetors and the older style of throttle-body injection system no longer used. If you really think that phenolic spacer is doing anything beside adding $$$ to the bottom line of Summit and whoever made it, I have a bridge for sale you may be interested in. There are MANY gimmicks sold that don't do a thing but those who buy them sure beleve in them. It's called the Placebo Effect.
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Old 09-02-2011, 09:52 AM   #11
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do they make after market throttle bodys or is it jsut as good to get the 4.0 TB's and bolt it on the 2.5
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Old 09-02-2011, 10:07 AM   #12
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Jp Magazine bolted a 4.0L TB onto a 2.5L and they reported that if anything changed, they felt it might have even lost a bit of power.

Let's not forget that nothing is going to be restrictive except, perhaps, at redline rpms and wide-open throttle. And in the TJ, I don't believe the throttle body is restrictive in the least even then.
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Old 09-02-2011, 10:16 AM   #13
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think ill jsut take my tb off and clean everything
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Old 09-02-2011, 10:50 AM   #14
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Throttle body spacers work great----IF---they are belt driven! Check with Avenger or Ripp. I love my Avenger S/C.
www.avengersuperchargers.com
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Old 09-02-2011, 04:02 PM   #15
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Originally Posted by Jerry Bransford View Post
As said above, spacers don't do a thing when placed under the air-only type of throttle body the TJ uses. It's well known spacers only help when placed under carburetors and the older style of throttle-body injection system no longer used. If you really think that phenolic spacer is doing anything beside adding $$$ to the bottom line of Summit and whoever made it, I have a bridge for sale you may be interested in. There are MANY gimmicks sold that don't do a thing but those who buy them sure beleve in them. It's called the Placebo Effect.
I'm very sorry to report, it works. I have other Jeepers here using the Trick Flow spacer and are very satisfied with it.I know you guys hate them, but I am not going to give up the extra gas mileage to make the nay sayers happy. Trick Flow is not a Placebo company they have a reputation for making brute horsepower on the race tracks with thier head designs , and they don't advertise on late nite tv or other rag mags. they are the real deal
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Old 09-02-2011, 04:59 PM   #16
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Spacers do nothing except empty your pockets.
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Old 09-02-2011, 05:02 PM   #17
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Oh I know who Trick Flow is (5.0 Mustang world) and they do produce a lot of legitimate quality products. A TB spacer is not one. TB spacers and sale of them for fuel injected engines is not unique to Jeeps. Their benefits or lack there of is discussed on MANY different vehicle forums and well as tested. I'd advise doing some research on what is the theory on how they work.

If a $5 chunk (in this case plastic) really increased mileage, with all the pressure vehicle manufactuers have to improve CAFE standards, don't you think all vehicles wouls have one from the OEM?
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Old 09-02-2011, 08:29 PM   #18
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Not going to happen, plastic, metal, paper/cloth lamination with synthetic resins (phenolic), what ever.

Only air is traveling through it, and that little spacer isn't going to drop the air temp, which would be beneficial if it did.

Maybe on a throttle body injected system it may do something. That millisecond of time it adds for the fuel/air mixture to travel to the combustion chamber may allow a minute amount of more fuel vaporization, for better combustion.
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Old 09-02-2011, 09:23 PM   #19
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I swapped out my throttle body for a 4.0 and also bored out the manifold to match. I can def. Tell a difference. Its nit a huge difference but at speeds were i would have to downshift to get going again i can tell i don't have to anymore... also the 4bangerjeep website did dyno test with the 4.0 throttle body and it gained 4 HP and some fuel economy, they also dynod with the 4.0 TB and TB spacer and it gained 6 HP and even more fuel economy. Go check it out if you don't believe me....
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Old 09-02-2011, 11:48 PM   #20
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Don't forget that bloody annoying high pitched whistle you get from the TB. Granted you may have to have canine hearing but man it drove me crazy. It did do absolutely jack for my F-150 though

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