The waste gate on the Mazadaspeed protege is routed to the plenium, most turbos have a line going right to the pipe before the innercooler and after the turbo. This is confusing to the waste gate doesnt need vaccum for any reason the only thing it needs to have act on it is the boost pressure to open when you have hit the desired amount of boost, and having it set up like it is should create boost spikes due to the distance that the air as to travel before it can open the waste gate if anyone knows why it is set up the way it is i would very much like to know.
Stock waste gate set up wrong?
- Thread starter alfveba
- Start date
Outlawstar98
Member
- :
- 2003 MazdaSpeed Protege / 2013 BRZ
Sorry... But am I the only one confused with his statement? I dont know what he is talking about... Most turbo'd setup's I know of have a dedicated vac line for the wastegate and BPV, BOV, Or both. And you saying something about before and after the intercooler? That confuses me cause I usually see just a BOV or BPV on one of the sides of the pipe that goes to the intercooler.
Metallic36
Member
- :
- 2003 Mazda6 3.0L Speed Yellow
Umm.. so technically you are saying that the WGA vacuum line should go to the hot pipe instead of the intake manifold? I think you'd have to take up your reasoning with Mazda.. lol. They made it that way.
i think he is saying that the wga doesnt need a vacuum source, so you be better getting a boost signal closer off the hot pipe because the air would only have to travel 15 centimeters instead of 3 feet... or something along those lines.
anywho i dont think its too uncommon to run a vacuum to the wga, easier to tap a vacuum line that weld on a nipple? maybe. i really dont know.
anywho i dont think its too uncommon to run a vacuum to the wga, easier to tap a vacuum line that weld on a nipple? maybe. i really dont know.
4
43975
Don't some cars run the WGA off the turbo itself???
Like this
Like this
Metallic36
Member
- :
- 2003 Mazda6 3.0L Speed Yellow
Bassmachine
Member
Thats how it should be.
Outlawstar98
Member
- :
- 2003 MazdaSpeed Protege / 2013 BRZ
It shoulddnt be "this is how it should be" it's set up the way it's set up, it works doesn't it? so it set up.
Wagonbacker9
Member
- :
- 2004 'Hoe
thats what I was thinking... lot of unnecessary force in the wrong direction.
I don't think it really matters (much anyway) how FAR the boost pressure has to "travel", as its really not "traveling" at all, there is no flow, it just has to transmit force through that line.
but it does matter because the length and size of the vac line can effect how much boost you get it maybe for a couple pounds but its something it can also take away boost if its to thin or if you use flimsy line it may callapse on itself and not allow the waste gate to open.
Outlawstar98
Member
- :
- 2003 MazdaSpeed Protege / 2013 BRZ
Then you dont cheap out and buy crappy parts. Buy brand name things that are KNOWN to be good.
JasonBourne
Member
- :
- 2003 Mazdaspeed Protege
i had the vac of the wga in the intake, but is there a difference if a connect to the brake boost??
Wagonbacker9
Member
- :
- 2004 'Hoe
brake booster line is supposed to be a better source of vacuum than the intake, however this discussion is whether you want a solid vac source, or a "boost only" source...
JasonBourne
Member
- :
- 2003 Mazdaspeed Protege
so....what you saying it's that if a connect to intake i have a solid vac, and if a connect to brake boost i have "boost only"..
Wagonbacker9
Member
- :
- 2004 'Hoe
thats not what I said.
boost only would be on the charge piping... totally different setup.
JasonBourne
Member
- :
- 2003 Mazdaspeed Protege
ok, but can i have a solid vac with the intake or the brake boost? and what's the difference of these 2 options?
Wagonbacker9
Member
- :
- 2004 'Hoe
brake booster is "supposed" to be a better source of vacuum than one of the small ports on the IM. if you don't have a vac block, it may not make any difference though.
either of these provides both boost and vacuum. a line run from the boost tubing would provide ONLY boost, as the boost tubing itself never operates under vacuum... only past the throttle body is vacuum possible.
either of these provides both boost and vacuum. a line run from the boost tubing would provide ONLY boost, as the boost tubing itself never operates under vacuum... only past the throttle body is vacuum possible.
Last edited:
