tooter's next manifold adventure...

[tooter]

Originally Posted by 1.5

Ive seen the TB spacer and those usually produce gains so id be excited to see how this does too. Have you thought of doing a tb as well tooter?

No.
Throttle body spacers don't actually do anything except slightly enlarge the air volume of the plenum. The CNC engineer at the design shop told me that once the intake runners are reading infinite (open space) at the entrances where they connect to the plenum, enlarging the plenum makes no difference.

In contrast, lengthening the intake runners themselves does alter the operating properties of the intake manifold by shifting the torque curve lower in the rpm range.






I'm pretty sure that a 2 inch thick Yaris spacer will yield results similar to the 2 inch thick Tacoma spacer as the two intake manifolds are of a similar design. I wanted to do a spacer for the tooter, but it already takes up almost all of the space in front of the engine.






Greg