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Old 11-13-2015, 10:11 AM   #1
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Throttle body spacer

Thinking of giving one of these a try to boost performance on the TV. Anyone have experience with these or have any input?
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Old 11-13-2015, 10:30 AM   #2
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Thinking of giving one of these a try to boost performance on the TV. Anyone have experience with these or have any input?
And... what is it supposed to accomplish?

Lower the resonant frequency of the intake plenum? Make the MAF/air cleaner assembly harder to service?
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Old 11-13-2015, 10:32 AM   #3
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I've heard they're a gimmick, but I've always been intrigued. I'm interested to hear if anyone has any first-hand experience/feedback. I've often thought about putting one on DW's XTerra.
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Old 11-13-2015, 11:03 AM   #4
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I've heard they are a gimmick too. If you want a little more performance from a GM, look into Black Bear Performance reprogrammed ECMs. I installed one last year and it made a noticeable difference in my 6.0.
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Old 11-13-2015, 11:06 AM   #5
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What is your TV?
IMHO most simple bolt-on engine performance enhancers are mostly snake oil. Surf forums discussing your TV and see what other folks are adding, what benefits they "claim" they get and what application the vehicle sees (highway, city, towing, racing...).
I owned an '06 Mustang 4.6 for a few years and considered adding a cold air intake which would also require re-tuning the computer. At the end of the day I decided against it. Since I was pushing 60 yrs I figured it was fast enough as-is. My point is to gain 15-20 hp I would wind up spending $1000 or more.
And my "resonant frequency of the intake plenum" was low enough.
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Old 11-13-2015, 11:52 AM   #6
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...snip...And my "resonant frequency of the intake plenum" was low enough.
No joke. The intake runners are tuned so that when the shock wave in the incoming caused by the closing of the intake valve(s) bounces off the back of the throttle plate, the reflected shockwave helps push more air into that cylinder.

Of course that is most effective when the engine is operated at the correct RPMs.

So, if you increase the distance from the intake valve(s) to the throttle plate, the shockwave will take longer to reflect back, therefore lowering the RPM's that allow the most efficient operation.

Save fuel? Increase performance? Confuse the Computer? Make it harder to work on? Make money for the pushers?

Yes, I'd like to hear some 1st hand accounts too.
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Old 11-13-2015, 12:00 PM   #7
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Thanks guys. I was thinking it was a gimmick. I'll save my money and time.
I wanted to put a K&N intake system on it like I had on my 2000 Silverado but it is not legal here in good old Calif. I just put a K&N filter in the stock air box and that will have to suffice.
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Old 11-13-2015, 12:05 PM   #8
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What is your TV?
IMHO most simple bolt-on engine performance enhancers are mostly snake oil. Surf forums discussing your TV and see what other folks are adding, what benefits they "claim" they get and what application the vehicle sees (highway, city, towing, racing...).
I owned an '06 Mustang 4.6 for a few years and considered adding a cold air intake which would also require re-tuning the computer. At the end of the day I decided against it. Since I was pushing 60 yrs I figured it was fast enough as-is. My point is to gain 15-20 hp I would wind up spending $1000 or more.
And my "resonant frequency of the intake plenum" was low enough.
I have a 2013 GMC 1500 Sierra with the 5.3L engine
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Old 11-13-2015, 12:33 PM   #9
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Thanks guys. I was thinking it was a gimmick. I'll save my money and time.
I wanted to put a K&N intake system on it like I had on my 2000 Silverado but it is not legal here in good old Calif. I just put a K&N filter in the stock air box and that will have to suffice.
Not legal? I know there are a lot of car guys that modify their cars out there and still pass inspection. Get your self a handheld tuner so you can get the most out of your engine. But yeah, don't waste your money on the spacer. That is one bolt on I refuse to do to my car. I bet there is a super charger out there that would fit your engine!!!
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Old 11-13-2015, 12:51 PM   #10
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Peruse various GM forums about this. Pretty much everything I've read suggests that any physical mods need to be accompanied by programming mods to the PCM.
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