Those with FD upper intakes
09-23-12, 12:59 PM
#7
there's no real port large enough on the FD UIM to match the spider. you could taper it down to a normal vacuum line and run it to one of the pre throttle body ports but it won't flow air sufficiently.
running the spider to a port on the LIM draws air the reverse direction so the injectors won't work properly!
the FD pulled air from the charge pipe right off the twins which is a static air port, do not hook them up to a vacuum port.
only spot that may work is the PCV valve port, but i have not checked to see if it is static pre throttle body or if it is a post vacuum port, most boingers they are hooked to vacuum post throttle body which will not work for this application. best bet would be pairing the injectors and running 2 to a single static port per pair.
running the spider to a port on the LIM draws air the reverse direction so the injectors won't work properly!
the FD pulled air from the charge pipe right off the twins which is a static air port, do not hook them up to a vacuum port.
only spot that may work is the PCV valve port, but i have not checked to see if it is static pre throttle body or if it is a post vacuum port, most boingers they are hooked to vacuum post throttle body which will not work for this application. best bet would be pairing the injectors and running 2 to a single static port per pair.
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09-24-12, 10:42 AM
#8
there's no real port large enough on the FD UIM to match the spider. you could taper it down to a normal vacuum line and run it to one of the pre throttle body ports but it won't flow air sufficiently.
running the spider to a port on the LIM draws air the reverse direction so the injectors won't work properly!
the FD pulled air from the charge pipe right off the twins which is a static air port, do not hook them up to a vacuum port.
only spot that may work is the PCV valve port, but i have not checked to see if it is static pre throttle body or if it is a post vacuum port, most boingers they are hooked to vacuum post throttle body which will not work for this application. best bet would be pairing the injectors and running 2 to a single static port per pair.
running the spider to a port on the LIM draws air the reverse direction so the injectors won't work properly!
the FD pulled air from the charge pipe right off the twins which is a static air port, do not hook them up to a vacuum port.
only spot that may work is the PCV valve port, but i have not checked to see if it is static pre throttle body or if it is a post vacuum port, most boingers they are hooked to vacuum post throttle body which will not work for this application. best bet would be pairing the injectors and running 2 to a single static port per pair.
do u know which ports on the uim are the static ports?
09-24-12, 12:13 PM
#10
i'd have to do an airflow test to figure out which are and which aren't, most on the FD are vacuum ports but not all. if you blow air into the port and it comes out before the butterflies upstream then it should be a static port. or you can run the engine and hook up a vacuum gauge to each port, if it registers vacuum then it's not a suitable port.
