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The Original Totally Divorced O2 Dump Housing

"Taiko Hosaki Kisoku Tatsu"
In Honor of our JDM Brethren

Version # 1 for Stock OEM LICP, And the Buschur Lower Intercooler pipe
Version # 2 for all other Aftermarket LICP... only...

The First Produced Totally Divorced
EVO 4G63T Engine
O2 Dump Housing

We have completely Divorced and Separated the Turbo Outlet from the Wastegate outlet.
In original form from the factory, the OEM O2 Housing merged the Wastegate Exhaust into the Turbo Exhaust;
this merging generated excessive Turbulence which leads to an increase in Backpressure of the
exhaust system of the 4G63T Mitsubishi Evolution engine.

Our product will allow the Turbo to breath/exhale much better.
With the Installation of our O2 Dump Housing;
the internal wastegate now has it's own exhaust pipe, completely separated and divorced from the exhaust system.
Our O2 Dump Housing now relegates the wastegate to an atmospheric Dump.
The excessive Turbulence and Backpressure that was a product of the Stock/OEM O2 Housing,
can now be alleviated by Installing the EvoPowerMods O2 Dump Housing.
The Turbo can now make power rather than fighting for space in the exhaust system.
The EvoPowerMods O2 Dump Creates Power, it allows for a much quicker Spooling of the Turbo,
Full Boost will be attained much sooner, Full Boost will be realized all the way to redline,
and most Importantly it allows for more room to Tune your ECU. Your ECU Tuner can now have more opportunities
with our O2 Dump Housing, being able to tweak your Evo with the above benefits will give you more power.
This added power will come-on sooner and last longer with our O2 Dump Housing.
Check out our R&D data below for confirmation.

Construction:
The EvoPowerMods O2 Dump Housing is constructed out of only the finest Materials.
We have chosen to use Mild Steel for our Flange material.
Mild Steel makes the best material for extended high temp applications.
You have no worry about our Flange Cracking, or Warping due to excessive prolonged High Temps.
Our choice for Tubing is only the best .065 / 304 Stainless available.
We have sourced our superior grade Tubing from a leading Aircraft Manufacturing Supplier.
We have Designed our Turbo / Exhaust Tube as big as possible to fit in the tight Evo Engine bay.
Our Tube is a full 3 inch design when others use a 2.5 inch tube, we only go down to 2.5 inch right at the Downpipe flange.
This aspect of a 3 inch Design sets apart from any other Product on the market.
We have measured the Volume of the Leading O2 Housings available on the market,
the EvoPowerMods O2 Housing has a much larger Volume than anything available.
It was in this Increase in Volume where Our Research Data showed us that Power could be made.
We did the R&D to squeeze every ounce of available Power out of this Modification.
Our Wastegate Tube/Pipe is a full 2 inch all the way from the Turbo Flange to the exit tip.
Again Bigger is Better in making power. our R&D Data showed us that the largest available Tube/Pipe
would the way to go with our design. We spent countless hours testing our O2 Dump.
Our O2 Bung is placed as far down the Exhaust Tube as is possible, this
was designed into our Product to reduce Turbulence as the O2 Sensor does stick out into the Exhaust stream.
We wanted our O2 Dump to be as free flowing as possible, this O2 Bung placement is just one example of why our O2 Dump Design is superior.
We have incorporated a spray-on High Temp Gasket coating on the Turbo side.
This is not necessary but we went ahead and applied this material and it will help in sealing the O2 Dump onto the Turbo Flange.
All of these Design issues show that our O2 Dump is over-engineered.

Version # 1 for Stock OEM LICP, And Buschur Lower Intercooler Pipe
Version # 2 for Aftermarket LICP ...only...

On our original Test Mule, (an 06 Evo MR) our O2 Dump made big power to the tune of 14 HP at the wheels,
along with full boost being attained much quicker, the power generated was seen all across the rev band.
From down low to the mid-range all the way to redline our O2 Dump made power.
That in itself is an exciting and hardly ever seen feat. A bolt-on making big power almost throughout the rev zone.
We feel we are onto to something big in our O2 Dump.
Take a look at these graphs to see for yourself that power was made all through the rev band.

Our Test Mule had the basic bolt ons/supporting mods; that will one day build on themselves with major upgrades down the road.
The owner plans on taking the stock Turbo as far as is possible, and our O2 Dump will work beautifully with that plan.
Even after the Stock Turbo has been replaced with an upgraded but still internal wastegate unit(such as the FP Green, Etc.)
our O2 Dump will still be very useful in making power and letting these Turbo's Breathe much more freely.
Our Test Mule Evo flowed very very well before our O2 Dump was installed; and to see these results was really enlightening and surprising.
This is proof there are gains to be made with our part. Every Evo will be different and show different gains;
however we have been very honest and tried to show just what our O2 Dump can do for your Evo.
There could be a case where More power can be had, or maybe in a very modded built Evo a slight but significant gain will be realized.
The Benefits just do not lie with a power increase, but also seeing the elimination of boost creep(a major problem for some Evo's),
full boost realized much earlier, quicker faster spooling of the Turbo, and again the ability for more room to Tune.

We have a couple of Reviews from 2 well-known Evo Owner/Tuners
that we would like to share their experience with the EvoPowerMods.com O2 Dump Housing.

--- Lil RICO ---
Quote-"Without tuning and driving it to work he are my first impressions:
Spool/ full boost for me is 250-500 RPM sooner, so the car feels tourqy.. I have M3 cams so I lost the down low tourqe, this brought it back and I still have my top end... It feels really good!!!

Daily driving you will not know it's on the car! You cannot hear it even at 8,000 RPM's unless your at WOT... I can boost 15 PSI and still not hear it, it comes alive at 75%+ throttle. I have some video's and stuff I'll be putting together later to show you all this.

As far as noise, yeah, it's loud when on WOT, but it sound good... It's the kind of thing that I enjoy People will look!!!! Yes it is that loud

Issue's I was having before with the stock O-2 housing that was ported was that I couldn't boost past 29-31 PSI. I'm on meth and my boost controller is at 100% DC. Once this part went in, BAM, instant 33-34 PSI Now that's what I'm talking about!!!!"

Next we have
---Touring Bubble / Project Tuning(owner) ---
who is a well known Evo ECU Tuner
that is on staff at as our Tuner/Consultant here at EvoPowerMods.com

--Quote--"My first driving experience with the O2 Dump ...

Well, I've tuned the car 4 times since the dump was installed, but I hadn't driven it till yesterday. For those of you asking about sound levels while daily driving, you have nothing to worry about.

At partial throttle, I was able to accelerate fairly swiftly and build up to about 18 psi without the wastegate opening.

I started with my usual daily driving style with moderate acceleration with about 5-8 psi. The car drives very similar to mine and the sound levels were perfectly tame (considering that it has a Greddy TI installed). After that I pushed the car a little harder each time I left a light to find the limit where the WG would crack open.

What I found was that under about 60% throttle you will not hear the WG dump at all. There just isn't enough exhaust flow to warrant opening the WG even though you can build significant boost. You can go part throttle all the way to redline and it's very tame.

Now, WOT is a different story ... go WOT at low RPM and it begins to scream after about 18 psi on the test vehicle (we're using a Greddy Profec-B II EBC). This holds true for throttle above 70% or so as well since the WG needs to work after that point ... it is a little quieter if you back of the throttle a tad though.

Of course, the throttle position and amount of boost where the WG opens will vary depending on your setup."

...end quotes...

Here are a couple of Videos where you can listen to our O2 Dump in action.
I personally Love the sound, it is the sound of Power...lol...
Not to worry about the Db levels, when staying "out-of-it" the Dump will not open up into the atmosphere.
Only when full boost is seen will our O2 Dump open up and growl like all Evos should.

As you can see and hear Our O2 Dump sounds great and you will only hear it when full boost is realized.
Daily Driving around town will be just as mild as you usual drive, with no worries about causing any growl.
Now however if you so desire the Growl is just full boost away. Most everyone that hears our O2 Dump just luvs the sound,
and it has 2 different tones. The lower gears 1-3 have a higher pitch growl, and the upper gears 4-5,6 have a much deeper tone.
We will be coming out with a simple Installation video in the coming days.
Our O2 Dump is an easy Install; while it does take some knowledge, it is well with-in reach of the the driveway mechanic.
We feel very confident in our O2 Dump Housing and it's ability to give you
a big jump in Horse Power as well as quicker spooling of your Turbo.
We would like to Thank Matt owner of Project Tuning for his input and ECU Tuning Skills
that helped us Develop the full amount of Power that this Modification is capable of.
We feel that we have been able to squeeze every ounce of power out of this Modification
and with Matt's Help we were able to Realize our Goal of producing
the Best O2 Dump Housing on the market.

Version # 1 for Stock OEM LICP, and Buschur Lower Intercooler Pipe
Version # 2 for Aftermarket LICP ...only...

If you are a bit confused about which Version to order, let me try and simplify it for you.
If you are currently running the OEM/Stock Lower Intercooler Pipes then order Version #1.
Version #1 will However work with Any Aftermarket Lower Intercooler Pipes,
if down the road you decide to install some Lower Intercooler Pipes then Version # 1 Will work with them.
Also if you are running the Buschur Lower Intercooler pipe then order this Version #1.

Now if you are currently running Aftermarket Lower Intercooler Pipes, such as AMS, etc.then order Version #2.
Version #2 is a slightly easier install and does Not require altering cutting the Undertray.
However Version #2 will NOT work with the OEM/Stock Lower Intercooler Pipes.

Any questions feel free to Email me "Q"

Stay Tuned for more Products from EvoPowerMods.