I have seen this done..is this old technology compared to all the manifolds today that have it on the mani collector. What are the benefits and cons. I know one con must be getting to the wg..any others.Thanks, for any info..

 

what? this wont relieve boost???? hence, wastegate will be worthless??? wont it??

 

some dsms run sought of like that off the 02 housing..any more info

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by grappler &raquo;</TD></TR><TR><TD CLASS="quote">some dsms run sought of like that off the 02 housing..any more info </TD></TR></TABLE>

No they won't... the o2 housing conceals a stock internal WG... unless they close that section off, remove the internal and use an external gate.... it won't work otherwise

You can't run the WG off the downpipe... period.. you can run it back into it.... but it will NOT regulate exhaust gas and boost.

The WG is BEFORE the turbo's turbine wheel, otherwise it is useless... as a WasteGate.

 

I'm a terrible drawer, sorry. That's my interpretation of what he's saying, and that's supposed to be a garrett 5-bolt flange.

The reason people don't do this is because it doesn't hold boost nearly as well as mounting the gate on the manifold. The exhaust is basically at the turbine by the time you bypass it, and it just doesn't work great.

 

thank you for posting that....it makes me feel a little bit better of my lack of art skills

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turbo-charged &raquo;</TD></TR><TR><TD CLASS="quote">thank you for posting that....it makes me feel a little bit better of my lack of art skills </TD></TR></TABLE>

I did you up a drawing real quick, I even signed it for you. It's in the mail, you can frame it and hang it


Quitting school and being on the fritz with a job = i'm bored as expletive

 

some of the old kiwi manifolds did not have wastegate on mani at all but it was attached to the dp..and they were used on honda too.. any info

and the block off of the internal wg thing makes sense and running an external

a guy from a major manifold company just told me back in the day with companies like kiwi, this was done cuz the steel was maybe a little thin and could not carry a wg so the dp was an optimal alternative....

still need some more understanding though..thanks everyone and tokes for pic

 

Why??? It won't control boost.

 

bump

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by grappler &raquo;</TD></TR><TR><TD CLASS="quote">bump</TD></TR></TABLE>

Would you stop trying to get more info!

A WG is USELESS when its on the DownPipe which is AFTER the turbo. Then it just becomes a cutout for the exhaust... and will NOT regulate exhaust flowing to the turbine housing like a WG should.

Stop trying to get more info on something that DOES NOT WORK!

 

Splitime, you should probably do some more homework on cars before you come into a thread and spread incorrect information.

As for the OP, yes, a lot of DSMs end up running wastegates off of the O2 housing simply to continue using the original exhaust manifold. On turbos that came internally gated, the hole in the exhaust housing for the flapper has to be welded up, and the flapper itself has to be removed.
Here's an example of a WG mounted on the Downpipe
If the turbo is not internally gated, then mounting the WG on the O2 housing would be more difficult, and would depend on the design of the outlet on the exhaust housing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MintFlavored &raquo;</TD></TR><TR><TD CLASS="quote">Splitime, you should probably do some more homework on cars before you come into a thread and spread incorrect information.

As for the OP, yes, a lot of DSMs end up running wastegates off of the O2 housing simply to continue using the original exhaust manifold. On turbos that came internally gated, the hole in the exhaust housing for the flapper has to be welded up, and the flapper itself has to be removed.
Here's an example of a WG mounted on the Downpipe
If the turbo is not internally gated, then mounting the WG on the O2 housing would be more difficult, and would depend on the design of the outlet on the exhaust housing.</TD></TR></TABLE>

Thats not off the downpipe though.... that is cutting the internal gate out of the stock O2 housing configuration and running the Downpipe seperately. Off the Downpipe means its POST turbine...


The link you provided is not off the DP... it is off the flange and uses the stock internal port. Thats all. The link you gave also does NOT have you welding up the stock internal gate... it just uses it... and ideally you port out the stock hole so you are actually upgrading flow. Flapper being removed - Yes.... welded up hole - No... since the unit you linked is for using that hole

So... uh... yeah... I'm still right

 

Sorry, I was not clear on which hole should be welded. I was talking about the hole through the side of the housing that allows the actuator to be connected to the flapper.

As far as whether it's off the downipe or not, we're getting into semantics. On most Turbo hondas, there is no O2 housing, so the part of the exhaust that bolts to the turbine housing is the downpipe. However, if you're talking about the part of the exhaust that is only post-turbine, then no, a WG would do nothing if placed there. I don't think that's what the OP was referring to as he mentioned DSMs immediately after.

Anyway, as I mentioned in my original post, DSMers do this mostly to keep the original manifold on the car, because a lot of the smaller turbo upgrades all use Mitsubishi exhaust housings. A wastegate on the manifold usually allows better boost control, so if you're turbo'ing a honda, you might as well just put it there like everyone else does.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tokes1320 &raquo;</TD></TR><TR><TD CLASS="quote">

I did you up a drawing real quick, I even signed it for you. It's in the mail, you can frame it and hang it


Quitting school and being on the fritz with a job = i'm bored as expletive</TD></TR></TABLE>

hahahahhahahahaha thats awesome!

running the wastegate off the 02 housing is very common and is bleeding off exhaust BEFORE the turbo...even though technically it doesnt LOOK that way.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MintFlavored &raquo;</TD></TR><TR><TD CLASS="quote">Splitime, you should probably do some more homework on cars before you come into a thread and spread incorrect information.

As for the OP, yes, a lot of DSMs end up running wastegates off of the O2 housing simply to continue using the original exhaust manifold. On turbos that came internally gated, the hole in the exhaust housing for the flapper has to be welded up, .</TD></TR></TABLE>


you explained that wrong so maybe you shouldnt give advice or criticize either ....splittime is right....

the way people add the wastegate to the downpipe is connecting the wastegate to the hole for the internal gate so exhaust can be expelled before going to the turbine wheel....the hole is very small and not a good idea for a big turbo as it wont work very well....

 

OK How about this. I will just show you a picture of the one I will be using soon. Weir made this for his car, and I snagged it from him.



This is pretty much how it has to work. Using a stock wastegate hole on the turbo.. like a T3 that has an internal wastegate port, and you run a pipe to the wastegate.. it doesn't have to be dumped back into the downpipe like this one, but its not a bad idea.

 

ok