I see it as the same basic principle as those "nuts" who put tunnel rams on their n/a engines!
But the ram effect (longer fuel travel) gives the engine more at the upper rpm range.
I think a 20 h.p. claim is a bit far-fetched. But I do see a benefit if you were to use a phenolic spacer instead of aluminum, which will help to isolate engine heat from the TB.

 

im not seeing why lengthening the tube will give you anything anywhere..... resistance is proportional to tube length. the best flowing intakes will have the filter attached directly to the TB.... if that was possible, but mots applications cant do that due to space issues.

 

True, but the OP is referring to a spacer that goes between the throttle body and intake plenum. Nothing to do with the intake/filter tube.

 

yeah i guess ur right. I lost track of what car we are talking about. in newer vehicles they have TB spacers which just shove the tb away from the intake manifold about a half inch. completely worthless. "oooooohhh, its got little ridges on its inner wall, like ruffles, i should shove ruffles with their rrrrrrridges into my intake!" [:'(]

only time a spacer will EVER help you is if it puts the filter or inlet into a higher flow area (ie, lifting the air cleaner on a carbed car higher into a cowl, or the 03 mach1 can raise its shaker hood to catch more air, most of which is lost over the hood)

 

That's not the only time. Spacers between a carburetor and manifold can have some benefits. Generally, a wide-open spacer will give better high rpm response, and a spacer with holes will add bottom-end torque. As an exaggerated version of an open spacer, take a tunnel ram intake for example for the high rpm benefits, then slap it on a stroker (torquey) engine. Sound like anybody we know??
Those TB spacers sound like they are geared towards the same "open spacer" principle, with ridges in it to give it a nice feel as it slides by! "Ridged for your inhaling pleasure." [8D]
But, worth 20 h.p.? I think not!

 

its not specified in the article, but i thnk this is an EFI part..... and from my experience intake spacers are completely worthless for EFI, even detrimental

 

Most of you probably weren't around, but in the late 50s and early 60s Chrysler did a lot of research in intake and exhaust tuning, andthe principlesdiscovered are still being used today in most engines. Their final product was the Max Wedge, the first version (long ram) had 30" intake runners with 4 bbl carbs mounted over the wheel housings, the second version had shorter runners with the carbs over the valve coversMost of you probably weren't around yet, but in the late 50s and early 60s, Crysler did a lot of research in intake and exhaust tuning.

 

nope i wasnt around then

 

and dend? lol!

 

NO AND DEND LOL!!!!