Keeping you up to date with the latest CorkSport Mazdaspeed news!
Category: News
Looking to find out about the latest Mazda news, Performance parts news, and future Mazda performance products. We also love to speculate about new models being released.
Do you ever open the hood to you Mazda and cringe at all the
boost and vacuum hoses – You know, the string of hoses and T-fittings winding
in every direction? Here at CorkSport,
we’ve had this same feeling and decided to do something about it.
Introducing the Boost/Vacuum Block and Fitting Kit…the
simple and effective solution for your boost and vacuum accessories.
This simple part for your Mazda allows you to consolidate
your various boost/vacuum hoses to one single source. You can finally rid your
engine bay of the numerous T-fittings that plague that single hose that
connects your intake manifold and BPV.
A central boost and vacuum source is plumbed to the block
and then distributed to six standard ports with 1/8-27 NPT threads. If you have a plan and setup you are going
for then opt for the Block and Plug Kit.
If you are unsure about what
you need now or in the future, then the
complete block and fitting kit is your best option.
Either way you are sure to make a huge visual improvement to
your engine bay. A little effort now
will go a long way later with this billet aluminum and anodized boost/vacuum
block.
Check it out here and get your today…your Mazda will thank
you.
-CorkSport
The Solution to all those Boost & Vacuum Hoses – CorkSport Boost/Vacuum Block October 23rd, 2019Derrick Ambrose
We’ve talked a lot about external wastegates with our recent CST6 development but today we are happy to announce the standalone CorkSport External Wastegate Housings for the CST4 and CST5. Available right now as an update for your existing IWG CST4 or CST5, the CS EWG housings make it easy to get the best in boost control for your Mazdaspeed 3, Mazdaspeed 6, or Mazda CX-7 Turbo.
While the CST6 will only come with an EWG housing, the external wastegate (EWG for short) is a new concept for the CST4 and CST5. Both of these turbos originally hit the market with an internal wastegate (IWG) only option that has a small flapper valve on the inside of the turbine housing to let off excess exhaust gases. Instead, the CorkSport EWG housings use an offshoot from the turbine scroll that has a v-band flange on the end. This flange allows for the fitment of an external wastegate for improved boost control. To run an EWG on an original CST4 or CST5 previously, you needed an EWG capable exhaust manifold and some sort of block off for the IWG port.
The new CS EWG housings make running an EWG on your Mazdaspeed3 easier than ever. Each housing comes with the elbow and clamp needed for great fitment. We even offer a dump tube/screamer pipe that works for both MS3 and MS6 as an add-on option. If you pick up the screamer pipe to go with your housing, all you need to supply is the EWG itself.
We strongly recommend a Tial MV-R 44mm wastegate as all design work and testing used this specific wastegate. Other wastegates may require modification for use. The 44mm size is a great fit for the Mazdaspeed engines, whether you are running an upgraded turbo on the stock block or fully built one that you intend to push to the limits.
So why would you want an EWG? For starters, EWGs truly offer the best boost control setup for any turbocharged car. Because the wastegate is separate from the turbocharger itself, it is easier to place for optimum boost control, plus, the design of the actuator itself can be optimized. As a result you get a wastegate that hits boost targets more accurately and responds quicker to changes in boost. This means no more boost spikes right when the boost hits (a common problem with poor quality IWG setups), and a near-flat boost curve. The isolated actuator also makes for faster and easier spring changes should you need to service or change your wastegate preload. For more info on the design behind the CS EWG housing, check out the full blog HERE.
One of the best parts of EWG over IWG is the sounds that come with a screamer pipe! While only intended for off-road use, a screamer pipe dumps the exhaust from the EWG directly to the air. This allows for a fantastic noise during a WOT pull, that sounds truly unique. It’s not all just noise though, by venting the EWG to the atmosphere instead of venting the IWG in your downpipe, you are decreasing exhaust turbulence right after the turbine wheel, reducing backpressure. On very high horsepower setups, this often generates some extra power as the turbine housing can be used more efficiently. Check out the product video below for some great EWG sounds from Barett’s MS3.
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There’s one final benefit of the CS EWG housings: housing design itself. Without having the IWG in the way to worry about, we were able to do some optimizing on the scroll and A/R. For CST4 owners, this means an increase in A/R from 0.66 to 0.82. Typically an A/R change like this will cause a slight decrease in spool time but an increase in max power potential. CST5 owners have this 0.82 A/R even with the IWG setup but there’s another benefit: greater swallowing capacity. This refers to the amount of volume in the turbine scroll. By increasing the swallowing capacity the turbine can ingest air more efficiently at the peak, which is especially important if you have an upgraded exhaust manifold or high flowing head. After all, an engine is an air pump – what good is shoving more air in if you can’t get it out?
If you’re in the market for a change on your Mazdaspeed, check out the CorkSport EWG housings for the CST4 and CST5 turbochargers. Better boost control, a more efficient housing, and best of all, a great new sound. Be sure to check out the listing for even more images and don’t be shy to ask questions we’ll be happy to help!
Mazdaspeed EWGs Made Easy! October 31st, 2022Derrick Ambrose
We are proud to introduce the CorkSport 72mm Throttle Body Spacer for Mazdaspeed 3, Mazdaspeed 6, and Mazda CX-7 Turbo.
This is a great product for those Mazdaspeed owners who want push past the limits of their OEM fuel system. We’ve carefully chosen nozzle locations, upgraded the inside diameter, and added an O-ring for quick and easy sealing. We designed the CS throttle body spacer to eliminate a lot of the headaches that come with adding extra fuel.
The area where the throttle body mounts is pretty tight on the Mazdaspeeds which leaves few options for adding methanol nozzles, especially the tall AEM ones. We realized right away that nozzle orientation was critical.
To prevent any modification, the top nozzle location sits at an angle that perfectly clears both the OEM & CorkSport Intake Manifold to provide an access port for most meth nozzle styles on the market. For more stealthy setups, there are two ports located on the bottom side of the CS spacer, one straight down and once again at an angle for easy usability without further modification.
We also considered nozzle depth when designing the CorkSport Throttle Body Spacer. Most nozzle styles will sit flush to the inside surface of the spacer. This prevents any irregular airflow around the nozzle locations without affecting the spray pattern of the nozzles.
Just like the CorkSport Performance Throttle Body, we enlarged the inner diameter of the throttle body spacer to 72mm. This is the maximum size that can be used with the OEM bolt pattern and ensures optimal best airflow. The OEM throttle body & gasket can still be used with no issues.
Each CorkSport Throttle Body Spacer is precision machined from 6061-T6 aluminum before being anodized black for a clean and durable look. An O-ring groove is added during machining to allow the spacer proper sealing to your intake manifold. Rest assured, the O-ring is safe with all fuels and even oil. Finally, the spacers are laser etched with a CorkSport logo for a subtle finishing touch. The entire package is wrapped up with hardware; including extended length throttle body mounting bolts & two NPT plugs for the nozzle/injector ports you are not using.
If you’re running out of fuel in your Speed and we can make installing a methanol system much easier, pick up a CorkSport Throttle Body Spacer.
CorkSport Throttle Body Spacer September 20th, 2018CorkSport
There has been a lot of buzz about the new(ish) turbocharged SkyActiv-G 2.5L first found in the Mazda CX-9 and now in the Mazda 6. Along with all this buzz, there are a lot of unknowns as well. Here at CorkSport, we’ve taken the step to try and address some of these unknowns. What is Mazda’s “Dynamic Pressure Turbo” and how does it work? There have been diagrams bouncing around on the internet, but no close-up view of the turbocharger itself. That’s about to change.
If you haven’t already read Daniel’s first installment, “Mazda Dynamic PressureTurbo an Introduction.” You wouldn’t want to miss out on the extra information before reading on.
The turbocharger found in the 2.5T equipped CX-9 and 6 is quite complex in design. There are many aspects to the OE turbocharger we could discuss, but today we are going to focus solely on the dynamic pressure system and turbine housing.
If you are reading this, then you’ve probably already seen various diagrams depicting how the dynamic pressure system works and showing Mazda’s clever 3-2-1 exhaust port design. If you haven’t, check it out below. Image credit to Car And Driver Magazine for the fantastic diagram.
Mazda’s 3-2-1 exhaust port design takes full advantage of the engine cylinder firing order. The advantage is improved exhaust gas scavenging for the adjacent cylinder (more or less the cylinder that just fired helps pull the exhaust gases out of the next cylinder that is about to fire). Ok, moving on; this is great, but how does the dynamic pressure system come into the mix?
Shown here are the turbocharger assembly and the dynamic pressure valve assembled as one unit (the first two images also showed the fully assembled setup). The three ports are clearly visible along with the “vane” that passes through the three ports. This vane rotates depending on the engine RPM to control the exhaust gas velocity entering the turbine housing. The vane itself is controlled by the larger blue-colored actuator.
Now let’s take an even closer look. The vane does not open until approximately 1600rpm, but the engine cannot run if there is no exhaust gas can flow out of the engine. To resolve this Mazda has designed a dynamic pressure system with two exhaust gas paths. Looking at the above image you can see a small opening just above the vane. This is the sub-1600rpm exhaust gas path.
By reducing the cross-sectional area of the exhaust gas path, the exhaust is forced to accelerate through the dynamic pressure system and into the turbine wheel. This effectively reduces turbo lag, improving the vehicle’s response at low engine RPM. Once the engine revs past 1600rpm the vane opens, allowing the larger path to be used.
Here we show the turbocharger assembly (right) and the dynamic pressure valve assembly (left) separated. Looking at the dynamic pressure valve assembly, you can now more clearly see the three small paths above the larger path with the vane inside. Then look at the turbocharger assembly and you will see the small upper path and the larger lower path.
The fact that these two assemblies are separate systems is great news for the enthusiast. The development of a performance turbocharger will be much more feasible and the dynamic pressure valve can be retained with the performance turbocharger. One more detail to point out.
Mazda put a lot of thought into the design of the wastegate port; let me show you why. First, looking at the inlet of the turbine housing you can see a small vertical wall in the large path. This wall creates a completely separate path to the wastegate port which is very unusual on an OE turbocharger. Combine this design with a very large wastegate port and you get a design that can “waste” or divert an excessive amount of exhaust gas.
This tells us the SkyActiv-G 2.5L engine is creating a lot of (currently) unused exhaust gas energy. Again this supports the feasibility of a performance turbocharger suiting Mazda’s new turbo engine quite well.
Great things are on the horizon for the Mazda 6, now if only Mazda would put this engine in the 3 paired with a 6-speed manual transmission. Oh, one can dream.
You’ve likely seen a quick glimpse of our 7th gear program previously, but there is NO WAY you have made it this far knowing all of the benefits and still not pulled the trigger.
There is just no way… and if so…You are MISSING OUT!
We’ve loved how this program has grown over the last year, with members giving product ideas, insight into their builds, and passing the EXCLUSIVE info on the gains we’re experiencing on our prototypes; it has truly become a community of enthusiasts. With pushing one another for higher power and better builds as a center, great parts, and direct insights provide for instant feedback and inputs on projects.
If you haven’t heard, or looked fully into this program, here is a brief overview and some insight directly from our members!
As a 7th Gear Member, you’ll receive …
An exclusive gift package worth $99 when you sign up.
You can only get these apparel items by becoming a 7th Gear member! – worth the cost of the membership by itself!!
Access to our exclusive 7th Gear Facebook group.
We’ll provide insider information on our products, lifestyle, and happenings!
You’ll interface with other elite members of the Mazda Community and receive CorkSport answers faster than anywhere else on the web.
You’ll have first access to new product releases via the 7th Gear Inner Circle thanks to your membership
If you’re buying anything with a significant shipping cost, it would be patently stupid to not get the 7th gear membership. The hat is top quality flex-fit and the shirt is nice too, big vinyls if you’re in to that. Exclusive access to sales, skipping the line on new parts, and you get behind the scene access for product development. Combined with CS points it’s a much better offer than competitor’s “free shipping”. – Jason Gambill
Free Shipping to the lower 48 States. (Hawaii, Alaska, and International orders get reduced rate shipping.)
You heard us right! Free shipping to lower 48 and reduced cost shipping for our members elsewhere!
“Do you love buying Corksport parts for your Mazda? Then why wouldn’t you want to join 7th Gear? Early information on upcoming parts so you and your wallet can plan ahead. Corksport is one of the few companies still developing new and exciting products for the Mazda/Mazdaspeed platforms. Why not join them and get an even deeper inside scoop! Even though I’m in Canada and I don’t get free shipping, the discount I receive does help! The cost of 7th Gear could be covered from just a couple orders. And even the occasional sale exclusive to 7th Gear is great.” – Michael Cheek
Automatic Annual Renewal that includes an awesome anniversary gift worth, at least, the cost of membership!
Once again, no one has access to this exclusive gift item unless they’re a 7th Gear member!
As a 7th Gear member, rest assured that we’re here to ignite your Mazda dreams into reality. With first access to parts, exclusive gear, exclusive 7th Gear promotions, and direct links to our CorkSport team, the free shipping is just a perk. Head to CorkSport.com for more information on 7th Gear today.
