David0ff

iTrader: (6)

in this diagram :



there is a yellow Vacuum line that goes from the turbo y pipe ... to the Lower Intake Manifold .. that feeds some air to the primary injectors ...

what`s the deal with this hose .. it is necessary.... isn't this really a vacuum leak
would it make a huge different in fuel atomization if it`s capped off ?

thx

IRPerformance

iTrader: (41)

Its not a vacuum leak. It supposedly feeds air to help atomize the fuel.

arghx

iTrader: (3)

Do not cap this. It's there for a reason. Any source of air before the throttle plates will work.

David0ff

iTrader: (6)

on the OEM setup it is fed to a nipple which also sees positive pressure
and on the diagram ^ ... it says atmosphere ... should i... or have any of you ever left the hose with a filter ( from the rat nest solenoids ) vented to atmosphere ... ?


im really out of things to twiner with on my car lol

arghx

iTrader: (3)

sorry, it says atmosphere because that diagram is from a series 3 GSL-SE naturally aspirated engine (notice the top feed injectors). Boost pressure (and atmospheric depending on engine load) is fine. That's how the 2nd gen turbos did it--the atomization ports were fed by a port on the UIM that pulled air from before the throttle plates. in fact, the series 5 had 3 atomization ports, one for the primaries and two separate ones for the secondaries. all were fed by the UIM.

IRPerformance

iTrader: (41)

I've seen some cars idle smoother with this left intact or replicated on a modified setup. On others it doesn't seem to matter much.

David0ff

iTrader: (6)

i really appreciate all your inputs .. thx a bunch guys

leprachaungold9

were can i find this diagram for a single turbo setup on an fc??? caus i pulled my motor a few days agio to rebuild it and the vacuum lines like nuts under the intake manifold ima need help aka diagram to put it back together lmao

grimple1

iTrader: (1)

in the FC forum?