[MaoZeBong]

he is saying that with the right size runners, a good N/a manifold can create positive pressure at wot instead of the usual vacuum.

if anybody else more knowledgeable can correct me if im wrong but iirc unnecesary runner length just adds more potential to pull a vacuum. too short and it can lose that effect

[marcus81184]

Originally Posted by bb1bluntcruise

he is saying that with the right size runners, a good N/a manifold can create positive pressure at wot instead of the usual vacuum.

if anybody else more knowledgeable can correct me if im wrong but iirc unnecesary runner length just adds more potential to pull a vacuum. too short and it can lose that effect

I think he's saying air bouncing in the manifold, if timed by length will be sitting at the valves when they open creating instant extra air like a s/c, but I'm saying what if adding length off sets the timing e.g. air is moving back away from valves when they open from removing plate. How much extra push does that flow anyways? That air is going to slow down without vacuum. I get a visual of a small room fan pushing air, then a shop vac sucking it. Not going to make a huge difference imo. Someone chime in please.

[accordh22a]

Originally Posted by zuptidi

they lost low end power and gained more high end power.

which dyno are you looking at? There isnt a point that the blacktrax loses power. it makes the same or more in every single dyno. especially if you look at the oem vs stage 3.

[meanshyguy]

someone needs to do a dyno with the plate completely removed and show us

[BBSix]

edit: re-read the thread and found my answer

[01ludeguy]

that hose goes to the crusie control vac line on my car.