isn't a swing valve the same as wastegate?

[fiater]

I read lots about swing valves - sizes, etc. Is this the same thing as the actual wastgate, just a different name. Also, on these Garret turbos with integrated (ie not seperate with a dump valve and y pipe near the turbo), how big can the swingvalve/wastegate get? I've read 3", but I don't see how.

Thanks!

[moparfwdsleeper]

nope, ill get you a pic of both ready that way now

[fiater]

thanks, I like information!

[moparfwdsleeper]

Here are two sides of a Garrett swingvalve... Sorry about the lighting, my fluroscent(sp?) bulbs are about to their end lol


Here is a Garrett big can wastegate(after fire)

[fiater]

OK, so when people talk about a 3" swingvalve, they're really talking about the exhaust flange diameter, not the actual swingvalve itself, right?

On your third pic, that is the wastgate actuator, not the wastgate itself. Considering it actuates the swingvalve, by default, the swingvalve and the wastegate are the same thing, right?

I'm probably being to finicky, but just want to get the nomeclature right when it's time for me to mod.

Thanks!

[moparfwdsleeper]

Quote:

Originally Posted by fiater OK, so when people talk about a 3" swingvalve, they're really talking about the exhaust flange diameter, not the actual swingvalve itself, right? On your third pic, that is the wastgate actuator, not the wastgate itself. Considering it actuates the swingvalve, by default, the swingvalve and the wastegate are the same thing, right? I'm probably being to finicky, but just want to get the nomeclature right when it's time for me to mod. Thanks!

When people are talking about the 3" swingvalve the picture is what they are referring to. The swingvalve and exhaust flange diameter? are one in the same.

The wastegate actuator is a wastegate, the swingvalve and wastegate are not the same. The pictures above are just as they are titled, swingvalve and wastegate.

[speeduphoria]

your confusing the guy, he's on the right track, the swingvalve housing(as seen above)has a puck which opens and closes(due to the wastegate actuator valve as shown above) and lets exhaust bypass the turbos turbine(to control boost)
This is used for internal wastegates:swingvalve and actuator

its comparable to an external wastegate which instead of bleeding exhaust off right at the turbing housing as the swingvalve does, it has a valve(external wastegate valve) before the turbo and does the exact same thing, bleeds off the exhaust to control boost.

They both use boost pressure against spring pressure in the valve/actuator itself to control boost

The differences are that an external gate is harder to plumb as normally it includes fabricating/welding to place the wastegate before the turbo, then you need to make tube for the wastegate dump either to atmosphere or to recirculate it back into the main exhaust pipe. The Internal basically fits on the turbo as is more compact. The external is normally better for control and possibly HP depending on variables.

Heres a pic of my setup with an external valve, just for reference as your on the right track.

[moparfwdsleeper]

Quote:

Originally Posted by speeduphoria your confusing the guy, he's right, the swingvalve has a puck which opens and closes(due to the wastegate actuator valve) and lets exhaust bypass the turbos turbine(to control boost) This is used for internal wastegates:swingvalve and actuator its comparable to an external wastegate which instead of bleeding exhaust off right at the turbing housing as the swingvalve does, it has a valve(external wastegate valve) before the turbo and does the exact same thing, bleeds off the exhaust to control boost. The differences are that an external gate is harder to plumb as normally it includes fabricating/welding to place the wastegate before the turbo, then you need to make tube for the wastegate dump either to atmosphere or to recirculate it back into the main exhaust pipe. The Internal basically fits on the turbo as is more compact. The external is normally better for controll and possibly HP depending on varibles.

lol if I confused him you just made him rethink turbo dodges

[speeduphoria]

Quote:

Originally Posted by moparfwdsleeper lol if I confused him you just made him rethink turbo dodges

well simpler is better so below is a simple answer to his more specific questions

Quote:

Originally Posted by fiater OK, so when people talk about a 3" swingvalve, they're really talking about the exhaust flange diameter, not the actual swingvalve itself, right? YES!, but sometimes the actual puck size changes also On your third pic, that is the wastegate actuator, not the wastgate itself(correct). Considering it actuates the swingvalve, by default, the swingvalve and the wastegate are the same thing, right? basically yes, together they are called an internal wastegate(swingvalve and actuator)

So there you have it, refer to my above post for more detailed description of internal and external wastegates

[moparfwdsleeper]

ok that made more sense

I was referring to external, you was refferring to internal... For a minute I was getting confused lol

[Kevin]

Quote:

Originally Posted by fiater On your third pic, that is the wastgate actuator, not the wastgate itself. Considering it actuates the swingvalve, by default, the swingvalve and the wastegate are the same thing, right?

For some reason Turbo Dodge people think they're special and call them "swing valves" while the rest of the turbo world I've been involved in uses the term "Internal Wastegate."

You'll get used to it.

[Gutfeeling]

Now what do you call the TEO4H housing with no swing valve, yet contains the O2 sensor & attaches to the downpipe? I use to know that name, but it's been so long since I had to use the word it just jumped off my tongue.

[Marcus86GLHS]

SPEEDUPHORIA is right.

FIATER the correct full terminoligy is Exhaust Swingvalve Assembly, which consist of the 1) turbocharger exhaust flange (the big elbow-like casting shown above), 2) the swingvalve itself (also called a puck), and 3) the oxygen sensor. all three parts are shown as a swingvalve assembly in the first two pix above that MOPARFWDSLEEPER posted.

what you dont see is a pix of the turbocharger outlet, which the swingvalve assembly bolts to. if you did, you'd see a secondary opening (port) on the turbo outlet that aligns with the swingvalve (puck)....as the puck "swings" away from this port on the turbocharger some of the exhaust gases escape out of this port and are dumped direct into to the exhaust rather than over the turbine wheel, slowing the turbine wheel, lowering boost. exactly what an external wastegate system would do.

the third pix he posted above is a vacuum/manifold pressure-actuated diaphram, called the Wastegate Actuator, this diaphram controls the position of the swingvalve (puck) based on the vacuum/boost signal it receives.


the short answer to your question "isnt a swingvalve the same as a wastegate?", i would say yes it is identical, functionality-wise.

[fiater]

cool, thanks. thought maybe I had overlooked something. The only other turbo car i dug into was my 03 evo, and that had a BOV. I did have an 86 colt turbo sedan as a kid, but didn't know much then, and only kept it a few months.

[bn880]

I believe that the actual wastegate is the part no one showed (the hole in the exhaust turbine housing)+the swing valve. Then you have the WG actuator mounted on the exhaust housing...



An Actual waste-gate. (cracked)

Another type of waste gate