GI: 1nz/1zz TB spacer

[AlexNet0]

Originally Posted by LtNoogie

Can you design one that smoothly transitions the 1zz throttle body to the 1nz intake manifold. It seems like there's an abrupt transition for those who are putting the 1zz throttle bodies on their Yaris.

I dont think I know quite what you mean.
do you mean a middle ground? a slight restriction on the 1zz tb while still more flow than the 1nz TB?

or like a port match?

[LtNoogie]

Originally Posted by AlexNet0

I dont think I know quite what you mean.
do you mean a middle ground? a slight restriction on the 1zz tb while still more flow than the 1nz TB?

or like a port match?

If I'm not mistaken, the 1zz TB is a larger opening size. It is being bolted to the 1nz intake manifold which has a smaller opening. I figured that an abrupt interface from larger diameter to smaller diameter would cause unwanted turbulence at the transition.

My question was... can your adapter plate taper from the larger diameter opening to the smaller diameter opening to lessen the turbulence?

[yarstar]

Noogie may be on to something with that low turbulence idea.

What do you think Alex?

[m911gt]

Originally Posted by yarstar

Noogie may be on to something with that low turbulence idea.

What do you think Alex?

He is on to something, otherwise all the spacer will do to the guys with the 1zz tb is allow the air to come at the intake manifold at a higher velocity and when it enters, it would be more turbulent than it is without a spacer. the spacer could/would actually cause a larger disturbance to the entering air.

taper would pretty much be required for those of us with the 1zz tb.