do throttle body spacers make that much of a difference? and does it create like a high rise intake effect for your motor, since it is between the throttle and your intake??

 

here check this sticky out.

https://www.performancetrucks.net/fo...d.php?t=395748

 

From what I have learned it does really nothing, just makes a wisle noise. I have one on my truck, it was givin to me so what the heck, I would not buy one. IMO

 

im sorry heres the full thread go down to post #8

https://www.performancetrucks.net/fo...06+GM+fullsize

 

NO it is worthless, save your money... Unless you want to plumb it for nitrous

John

 

So sad to see so much mis information on here.......

 

TB spacers...
These are probably the most misunderstood things there are. It seems that almost everyone installs one on his or her engine. Most people know that it helps top-end power, but they don't really know why. The answer is, it increases plenum volume, which reduces the induction pulses at the carburetor and brings the peak velocity through the Throttle body down. Most manifolds are made with plenums that are too small, so adding a spacer will usually help. Manifold companies know that the plenums are too small, but it is easier to add a spacer if it's too small, than to remove space if it's too big. Just about every engine design will be offered at different displacements. So a company must design a plenum to work well with the smallest displacement engine available or make sure that is marketed toward larger displacement or higher revving engines.

A better question would be, "Is my intake sized properly, or do I need a bigger plenum?"

 

So you are saying that putting a spacer between the tb on our trucks will actually make a difference and will get a power increase.. Pr are you refering to old school carbed style manifolds??

John

 

ya, that post confused the **** out of me.

 

The theory is the same, though it was designed around a carb style intake. Much of the engine characteristics are dictated by the intake. Look at a ls1 or a fast intake. They change the power curve by flow? The biggest restrictors in most intakes are the valves… So how do the intakes flow more air? Helmholtz theory. By changing the length, taper, size of the runners and plenum you can “tune” the intake to perform in a certain rpm range.

Every time the intake valve closes it generates a wave. Helmholtz theory is basically trying to tune that wave to bounce of the intake and return to the valve just as it opens. Thus more pressure, better cylinder filling at that particular rpm range.

I have done just a touch of research on this topic for a project of mine. But There is much much more to this…….