Topic: Throttle body spacers. (Read 20632 times)

chrisjones · « **on:** July 04, 2005, 02:03:53 PM »

Been looking through the 4WD calalogue! :-k

They work by creating a vortex in the air entering the cumbustion chamber which aids atomisation of the petrol but the gas is introduced BEFORE the throttle directly into the air intake.

So will a spacer make any difference, anyone got any thoughts :?: :?:

Anonymous · « **Reply #1 on:** July 04, 2005, 02:07:37 PM »

OMG, hes started already!!!!! & I am the one with the gadget reputation......

? 4wd shares are about to go up bigtime!!! :lol:

chrisjones · « **Reply #2 on:** July 04, 2005, 02:11:09 PM »

Yup!......that helped!! :lol:

Bubba · « **Reply #3 on:** July 04, 2005, 03:51:21 PM »

chrisjones · « **Reply #4 on:** July 04, 2005, 05:06:44 PM »

M'I gona get any serious answers?

:?

Or is that just asking too much?? :lol:

Anonymous · « **Reply #5 on:** July 04, 2005, 05:15:17 PM »

Dunno about Gas, but seemed to make the TJ rev easier.

Yup

Johnny Kebab · « **Reply #6 on:** July 04, 2005, 05:39:27 PM »

I have one, haven't fitted it yet, not a clue how too! but they're supposed to be good!

Johnny Kebab

Mick O · « **Reply #7 on:** July 04, 2005, 05:44:18 PM »

I was thinking about getting one

I think you best talk to Tank

He's Birtys gas expert

Bubba · « **Reply #8 on:** July 04, 2005, 05:46:05 PM »

yup sgood oughta work on the gas methinks real easy to fit you can almost open the bonnet and throw it in from fifty paces its so easy

Anonymous · « **Reply #9 on:** July 04, 2005, 06:34:54 PM »

So easy I did it.... just be careful not to over tighten the bolts when you put it back on.

No, I didn't, it had a HUGE warning on it when I got it

Woody · « **Reply #10 on:** July 04, 2005, 10:00:30 PM »

Fitting a TBS was one of the easiest and quickest jobs I have ever done on the Jeep. Only 1 size of socket required - the box said it was a 30 minute job, they must have had a couple of brews and smokes in that time. TJ definitely had better mid range pickup once fitted.

I think the vortex would work better with LPG over petrol as it will have longer mixing with the air before it reaches the cylinder.

Woody

Anonymous · « **Reply #11 on:** July 04, 2005, 11:40:07 PM »

Sneaks in

Where from n do they have instructions?

chrisjones · « **Reply #12 on:** July 05, 2005, 12:05:42 AM »

Cheers guys. :twisted:

Stew, 4WD have got loads on their website. :wink:

Tank · « **Reply #13 on:** July 05, 2005, 07:02:04 AM »

Chris if you paid more attention,i put some info on here a few weeks ago regards a guy that ships TBS all in for about £18.Scroll down the tech to heading "62 mm throttle body spacer for 2.5/4.0 Cherokee/Wrangler"(or there abouts )and you`ll see what you need to know :lol: :lol:

chrisjones · « **Reply #14 on:** July 05, 2005, 07:46:33 AM »

Oops! cheers Tank :lol:

RichT · « **Reply #15 on:** August 20, 2005, 09:01:17 PM »

A throttle body spacer came with my AEM Brute Force air intake, they reckon that the spacer is responsible for 40% of the upgrade in performance.

Anonymous · « **Reply #16 on:** August 20, 2005, 10:06:46 PM »

There was one on ebay went for £44 when an Airraid from 4wd is $69.95!

Planning to get one

Tank · « **Reply #17 on:** August 20, 2005, 11:19:11 PM »

As i said before,i got one from a guy in the States and all in,inc postage was about £18.Try checking out Ebay.com and try throttle body spacer there and see what comes back.This guy said states only but he did ship

Anonymous · « **Reply #18 on:** August 22, 2005, 09:37:47 AM »

I got one from him too

BlueJay · « **Reply #19 on:** August 22, 2005, 04:26:17 PM »

I really can't see how this works, Turbulence for better mixing? The injectors take care of that, I would think?

Air flows in a turbulent manner anyway, so more turbulent is not going to work.

Snake oil as far as I can see, spent you money on pork pies!

chrisjones · « **Reply #20 on:** August 22, 2005, 04:31:34 PM »

Guess your not an engineer then BlueJay. :roll:

Mind you ya' can't be an expert on everythin' :?

BlueJay · « **Reply #21 on:** August 23, 2005, 12:55:14 PM »

Sorry, but I am, which is exactly why I am sceptical!

WHen somebody shows me dynotests with only the spacer as the difference I'll start believing...

chrisjones · « **Reply #22 on:** August 23, 2005, 01:19:15 PM »

Oh good, that makes both of us engineers.

I've not seen data on throttle body spacers, But the theory behind them is a good one, and you of all people should know that. How much of a difference they make on there own is questionable, but in theory they should make a difference. If you can create a vortex in the air- flow then you will get a better, more even, fuel air mix in the combustion chamber and a more complete burn.

The injectors, do not mix the fuel and air (As your previous post suggests you think) They inject fuel into the air flow in the combustion chamber. It is the way that air flow behaves that dictates how well that injected fuel mixes.

So there!! :lol: :lol:

(I haven't always been an architect! :wink:

)

BlueJay · « **Reply #23 on:** August 23, 2005, 02:14:06 PM »

Well, lets look at this a bit more in detail:

The intake valve opens on cyl1 and the engine sucks in the air, lets say 4.0/6=0.667ltrs.

This 0.667lts comes from the air intake manifold which contains about 2.4ltrs of air in total, so in the line to cyl1 lets say 0.67lts (as this is the longest and therefore as higher capacity).

So any vortex created in the throttle doesn't reach the intake of the intake valve of the engine.

Furthermore, it is my believe that the air travels inside the manifold at such a speed that there is turbulent flow (we could verify this by using reynolds numbers and the like, but I woud guestimate that this is true). Turbulent flow is about the best you can have for mixing, so what is the point in making is more turbulent?

However, I would love to be proven wrong because:

1. I am not an auto engineer
2. It would be great to gain 15bhp(?) for 20quid!
3. I usually work on the principle if it sounds to good to be true it usually is.

So any one got dyno test results??? Because you won't get them from the manufactures!

chrisjones · « **Reply #24 on:** August 23, 2005, 02:38:36 PM »

You make some really good points there. You've thought about this I can tell! :shock: :shock:

To say that any vortex created wouldn't reach the combustion chamber though...... The air flow through the intake manifold can be taken to be virtually constant considering the volume and flow rate so as long as the internal surface of the intake is relatively 'smooth' the air capacity in the intake should make no difference.

I'd guess for these things make any worth while difference you would have to have a polished and ported head and intake, so on that point maybe yes.

Author Topic: Throttle body spacers. (Read 20632 times)

Anonymous

Anonymous

Johnny Kebab

Anonymous

Woody

Anonymous

Tank

RichT

Anonymous

Tank

Anonymous

BlueJay

BlueJay

BlueJay