Dont by throttle body spacers!

[Max713]

I want to finally but an end to all the talk of throttle body spacers, unfortuneatly Ive come across several threads recommending them, especially to people with less experience in modification.

 

You will never(*) see any gain from a throttle body spacer, in fact, in some cases it lowers hp! About a year ago, somebody did a dyno comparison with a t.b.s, theres was a 0whp, 0wtq gain across the board. Unfortuneatly, the pics are now down of the dyno charts. In some cases the "swirls" in the t.b.s. are smaller than the throttle body bore and actually creat more restriction, thus lowering whp. The only thing a t.b.s. is good for, is a place to put a nitrous nozzle.

 

* During the dyno comparison, a 1whp, 3wtq gain was shown when using nitrous as the added distance from intake to cylinder aloud the nitrous to atomize a LITTLE bit more.

 

So please, let this end all discussion on throttle body spacers.

[DarkOblivion000]

I personally have not put a throttle body spacer in my car, but I have read many threads about this mod. If you google throttle body spacers and whether they have an effect, you come up with a lot of discussion spread across many different models of cars.

 

There have been experiments done, and there was one article that said that in order to see any gains from a throttle body spacer, the spacing would have to be 1m. I've seen some threads on here with people mentioning how great they are, but I attribute these to the placebo effect (people wanting to believe that their mod has had an effect, and so they make themselves believe there is a performance difference).

 

I would not waste my money on this part.

[m sprank]

I have never used a throttle body spacer on a Subaru.

That being said...

The theory behind a throttle body spacer revolves around creating more turbulent air. In theory if the air flow is more turbulent then the fuel will mix better with it (atomization). This better mixture should create a better burn (combustion), thus creating more horsepower. This theory becomes moot when forced induction is involved. How much more turbulent can the air get when its coming out of a supercharger or turbo? The intake is already full of compressed air at above atmospheric pressures. You might see a small gain from a normally aspirated engine but this too is debatable. If you have a gt don't get a throttle body spacer, it doesn't work. If you have a 2.5i, its your car do what you want with it.

My 2 cents.

[CwhillVT]

Yep, throttle body spacer FTL, The Tornado FTW!