Forum » General Engine Building Discussion » Vacuum - how to route so everything gets equal vacuum pressure

Vacuum - how to route so everything gets equal vacuum pressure

General Engine Building Discussion

Talk about engine building here. New products, tricky questions or showcase your work - If it's engine building related it's welcome here.


Page 1
Author
78 Views

Air pressure and vacuum lines are baffling to me for some reason. I'm running ITB's on my build and want make sure everything gets equal pressure - MAP sensor, BOV, turbo controller, etc.

So how do I go about this? Can I link all the vacuum ports from the runners together (as shown in the attached picture) and then connect that single line to a manifold, and from the manifold route to all my sensors/components? Will this accurately distribute the manifold pressure?

Here is my proposed manifold: https://www.amazon.com/Vibrant-2691-Anodized-Aluminum-Manifold/dp/B0018033OQ#customerReviews

Thanks!

Attached Files

I have never dealt with ITBs, but unless you are running huge lengths of vacuum lines, I can't imagine a large enough inconsistency in vac/pressure along the entire system, provided there is no leak. That being said, there is optimal locations for sensors. The recommended location for pressure sensors is areas with low air velocity (somewhere in the main plenum/reservoir of the intake), while temp and air flow sensors should be located where there is higher air velocity in the system.

When I see people cleaning up the engine bay, they typically remove vacuum ports and localize the lines to a single block, but that is usually done to clean up the OEM rats-nest of vacuum lines.

Thats my 2 cents, take it with a grain of salt and if someone has experience with ITBs, they could probably chime in with more details.