When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Has anyone put a secondary vacuum port before the throttle body but after the MAF? Looking to find a way for a 2-line catch can, RX says a second port helps to continue to pull vacuum at WOT. But, all I have between my TB and MAF is 2 inches of flex tube (4th gen Trans Am with Ram Air). Does someone make a silicon tube with a port fused into it? or something similar?
The area between the TB and MAF is not under manifold vacuum. That area should be under very little to no vacuum with an ideal set up. There will only be vacuum there unless there is a restriction in the air intake track. If you want to add a 2nd vacuum line to your catch can you will need a port after the throttle blade, (intake manifold side of throttle blade).
06-08-2016, 07:34 PM
Secondary vacuum port before throttle body 
