external wastegate problems?
08-06-2004, 11:51 AM
#1
3.0 BAR
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Join Date: Apr 2003
Posts: 11,058
external wastegate problems?
alright so i've got the 35mm fake tial wastegate with a 6 psi spring. it opens fine at 6 psi and i get no spikes at all with it. the only thing is, when my car is idling and in low rpms, it sounds like a big *** exhaust leak, so i'm assuming the wg is open somehow? i never paid much attention to it b/c it functions properly and i didn't know if this was normal or not, shouldn't it stay completely shut like it's not even there until it reaches 6 psi? also the reason i think something's up with it is that my boost controller doesn't seem to be affecting it, it's still opening at 6 psi
i have the boost controller in line between the side port on the wg and a direct source of vacuum from the im, i'm just venting the top nipple on the wg.
i have the boost controller in line between the side port on the wg and a direct source of vacuum from the im, i'm just venting the top nipple on the wg.
08-06-2004, 11:58 AM
#2
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Join Date: Dec 2002
Posts: 3,396
Re:external wastegate problems?
this is why man.
your boost controller has to be inline with the top nipple on your WG to work.
the bottom nipple should be a striahgt hose from IM, the top nipple should be a hose with controller inline going to it
get it? heh
your boost controller has to be inline with the top nipple on your WG to work.
the bottom nipple should be a striahgt hose from IM, the top nipple should be a hose with controller inline going to it
get it? heh
08-06-2004, 11:59 AM
#3
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Join Date: Dec 2002
Posts: 13,991
Re:external wastegate problems?
it should be closed, the only time I've ever heard a wastegate doing that is when you hook it up on the top (wrong). Just disconnect everything off the wastegate and see if it sounds normal, it should be shut at idle with no lines going to it. If you think its open, put your hand on the dump tube and see if hot air is coming out.
08-06-2004, 12:04 PM
#5
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Re:external wastegate problems?
i always thought the boost controller was up top and the bottom/side nipple was straight to a vacuum source, but lately all i've been hearing is top nipple = vent, side/bottom for boost controller if you're running one, and straight hook up if you're not so jeff, what should i do if i disconnect the lines and it is open at idle, what would cause this and how could i fix it?
so jeff, what should i do if i disconnect the lines and it is open at idle, what would cause this and how could i fix it?
08-06-2004, 01:15 PM
#6
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Join Date: Dec 2002
Posts: 3,396
Re:external wastegate problems?
boost controllers are always on the top nipple, because they bleed boost presure to the top of the diaphragm to prevent it from opening sooner.
which is why a boost controller can only raise boost, not lower it.
which is why a boost controller can only raise boost, not lower it.
08-06-2004, 01:53 PM
#9
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Join Date: Apr 2003
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Re:external wastegate problems?
Originally Posted by shortyz
side nip should be right to intake.
the top should have your boost controller inline with it.
itll work go try it.
the top should have your boost controller inline with it.
itll work go try it.
