Topic: throttle body spacers

[benpeters8]

what is a throttle body spacer? would it be worth the money to put on a 98 wrangler?

[Jeffy]

Here's a start.

http://www.4bangerjp.com/forums/viewtopic.php?t=15

[benpeters8]

iight cool. i heard that u k&n systems dont work w/ throttle body spacers or something like that

[Jeffy]

I highly doubt that.  A intake tube has no bearing on the intake runner length.

[benpeters8]

so i could get a k&n CAI system and a throttle body spacer and that would be fine?

[Jeffy]

If you wanted to, yes.

[benpeters8]

iight cool, thnx alot

[quicksand]

Along with more air in as far as cold air intakes yes it does add HP, along with bigger throttle bodys and yes spacers do work. Some work different than others. The kind with the screw design on the inner walls of the bore only helps to enhance torque at slow speeds. They do not have much affect on the highway. It is best to use a smooth bore spacer for smooth air transitions . If you do get one get one, get one with a smooth bore or if it does have any type of design inside the bore make sure it has smooth directional sufaces.

[Bounty Hunter]

The kind with the screw design on the inner walls of the bore only helps to enhance torque at slow speeds.

I don't agree with this, I think any helix is a gimmick as the velocity of the air is simply to great for the helix to have any positive effect.  Especially the tight helix as in the AirRaid spacers, it's like asking the air to turn nearly 90º as it passes the helix.

[sharpxmen]

I don't agree with this, I think any helix is a gimmick as the velocity of the air is simply to great for the helix to have any positive effect.  Especially the tight helix as in the AirRaid spacers, it's like asking the air to turn nearly 90º as it passes the helix.

imo it really depends on the manifold design and without some flow bench testing would be hard to tell. the tight helix would probably do very little regardless of the design just like you said but the thing is that for the jeep manifold the helix won't do anything, in fact i'm convinced that would hurt rather than have any benefit (it bends 90 deg to the intake runs just under the t/b).

[quicksand]

Exactly. Air coming in , as it goes through a TBS with horizontal ridges is not going to decide to slow down and turn around and around at 90 degrees, as if air has a mind of its own. And what about all the air in the center of the bore, much less the air that ripples over the ridges of the screw design. It would just slow down air. Smooth walls are better for smooth air transitions. Its like would you put a air intake tube that was smooth or with ridges like a wash board.

[dwtaylorpdx]

It depends on the size of the ridges, sometimes you texture the walls to
keep the air flow from adhering to the surface and it actually speeds up the air flow.

I have a engine builder friend that tried a bunch of different configurations on a Toyota 1600 twin cam.
engine turns up to about 7500. On the dyno he could not find a difference in the helix vs non helix,
the thickness of the spacer made way more difference.

Dave

[quicksand]

Yeah every bit makes a difference, for the good and bad results. Sometime I would like to try a higher spacer such as 2 1/4 in high to 2in high. That is if you have the hood clearance. Just to what would happen