CorkSport BIG Turbo

Good day boosted enthusiast!

We wanted to take some time to give you all a quick update on one of the many projects we have brewing up here at CorkSport Headquarters.

The project I’m referencing, in general, is our 2nd turbocharger upgrade for the Mazdaspeed 3, Mazdaspeed 6 and CX-7. This unit is a substantial upgrade over our current 18G turbocharger. This Turbo will cater to those looking to take their performance and power goals to a higher level.

Not only will it be capable of putting you well into the 465whp range but this CorkSport Turbo upgrade will be able to do it without giving up on reliability and throttle response.  

It will be very beneficial to those who have mildly-built blocks and a supporting fuel system that will allow them to get higher in the HP range.

So, let’s talk about some of the features you can expect on the upgrade and why we decided to utilize them.

 

 

Let’s start at the heart of the Turbocharger.

The new CorkSport turbo will take full use of a GTX3076R center housing and rotating assembly (CHRA). The unit is equipped with a fully sealed ball bearing cartridge, which is a nice upgrade when compared to a standard journal bearing unit. We chose to go with a ball bearing unit for a few reasons.

  1. The enclosed design of a ball bearing system allows us to eliminate the need for a thrust bearing, which can account for about 40% of the bearing system drag on the turbos rotor assembly.
  2. Ball bearings reduce the viscous drag, which allows a ball bearing unit the ability to spool up about 15% faster than its journal bearing equivalent.

The next thing you will notice on the new Mazdaspeed Turbocharger upgrade is the holes that are drilled into the compressor cover. These little holes are known as anti-surge ports and are intended to expand the turbochargers compressor map. The ports function to move the surge line further left on the compressor map which gives the Mazdaspeed turbo some more headroom before it falls out of its efficiency island. Anti-surge ports are becoming increasingly more popular in modern performance turbochargers and with great reason. They offer some unique benefits as mentioned and will be fully integrated into our unit.

 

Last but not least, as with our CorkSport Turbo, this bigger Mazdaspeed Turbo will once-again be a true drop-in unit; minus the 4” compressor inlet.

There will be no cutting, modifying, sourcing oil and coolant lines, running to the store to buy couplers, etc. This unit will come with everything you need to have a trouble-free install. As with the current CorkSport 18G turbocharger, the new Garrett-based design will come with all studs, gaskets, washers, and knowledge that you need to have a nice weekend install.

So keep your eyes peeled as we get closer to delivering more performance for the Mazda community!

– The CorkSport Team

 

SOURCES: Miller, Jay K. Turbo: Real World High-Performance Turbocharger Systems. CarTech, 2008.

 

2018 Mazda 3 CBR – Transmission Modes Comparison

If you didn’t know already, CorkSport recently bought a brand new 2018 Mazda 3 Hatchback Touring Modelwith an automatic transmission.

Yes, I know, a performance aftermarket parts company has an automatic; I’m right there with you, but there’s a good reason for it.  CorkSport has a couple Mazda3 6-Speed Manuals and a couple manual and automatic Mazda 6’s, but no automatic Mazda 3; so it made sense to add that to the garage, especially with the many new performance parts we have in the pipe line.  Check those out here.

Now back to the CorkSport’s new 2018 Mazda 3.

The 6-speed automatic comes equipped with three transmission control modes; Standard (default), Sport, and Manual (aka manumatic).

We became curious about how those three modes affected the driving experience, specifically the shift points. I believe we all understand how the Manual control mode works, as it provides nearly 100% control of the shift points, so for the comparison I am going to focus on the differences between the Standard and Sport modes since those are controlled by the ECU.  

Driving the car on the street, you can easily feel the difference between the Standard and Sport modes of the Mazda3.

The Standard mode feels soft, relaxed, and maybe even lazy between shifts. It seems to default to the highest gear (lowest engine RPM) possible in every driving situation. This is great for fuel economy, but disappointing for smiles-per-gallon.  Push the Sport toggle, and the car comes alive.  The engine pulls through the RPM range longer for each gear and seems more eager to accelerate with the slightest throttle input. MUCH better.

The Butt Dyno is great and all, but it’s subjective, so we decided to strap the car down on the dyno to see what is happening; what exactly is changing between the Standard and Sport modes with the CorkSport 2018 Mazda3.

On the dyno, things become much clearer, but first, we had to set up the dyno to provide us with useful information. Typically we are testing wheel Torque and Horsepower, not shift points. It was interesting to play with the various parameters the dyno has available to find a readout that would convey the shift points and the effort the car was exerting. Check out the graph below; this is not your typical dyno plot.

With this dyno plot we quickly see that is much different than the typical readout.  I’m going to break it down, so it’s clear and easy for you to understand what is going on.

Description: Standard Mode = Red, Sport Mode = Green

The horizontal axis is our independent variable in the test. This is the variable/parameter we can control directly in the test. Since we are trying to understand the difference in shift points between the Standard and Sport modes, Road Speed was the logical choice. To be consistent, the throttle input percent for both Standard and Sport modes was held constant throughout the test runs.

The two vertical axis’s are the dependent variables in the test; these are the parameters that depend on engine RPM. On the right side of the dyno plot, we have engine RPM; this is represented by the lines with dots. On the left side of the dyno plot, we have tractive effort, which is essentially the amount of force the tires are applying to the road surface.

Looking at the two graphs, it’s clear that the Sport mode shift points and tractive effort are much different than Standard mode. This is interesting because we can now visualize what we were feeling while driving the Mazda 3 Hatchback on the street.

In Sport mode, the car carries through the engine RPM longer, and the resulting RPM after each shift is also higher.  Because each gear is carried to a higher RPM the resulting power is much greater, which is shown with the tractive effort plots.

Finishing statement: Sport mode significantly changes the way the car drives and responds. If you are looking for some fun out in the curves, don’t be shy, hit that Sport toggle and let the Mazda do what it was designed to do best.

Happy driving!

-Barett @ CS

What’s in the Pipeline for the 2014+ Mazda3?

Here at CorkSport, we are always working toward the next new product. We create our catalog just like you build your cars. Since there’s so much in development, we thought we would give you all a glimpse into what’s coming for the 2014+ GEN3 Mazda 3.

2.5L SkyActiv-G Turbo Kit

Let’s start with the big one since you’ve all been asking for updates: the 2.5 Liter Skyactive Turbo Kit. We are still making steady progress and are more excited than ever for this Mazda3 Turbo. Our functional turbo kit prototypes are slowly starting to arrive, meaning we are inching closer and closer to having our Mazda3 test car on the dyno (with added turbo noises). Stay tuned folks; this is going to be a fun one!

2014-2016 Mazda 3/6/CX-5 Motor Mounts

 

We already showed you the new and improved CorkSport Rear Motor Mount, but there’s more to come with the CorkSport Transmission Motor Mount. Check out the CAD model above to see what we’re talking about. Keep tabs on the CS blog for more info on the design and function of this motor mount soon.

2014-2016 Mazda 3 Skid Tray

The CorkSport skid trays have been consistently requested for the Mazdaspeed models; so much, that we brought them back for both the Mazdaspeed3 and the Mazdaspeed6. Now we are providing the same benefits to Mazda3 owners. We just received and test fit our first prototype skidplate, and it’s looking very promising moving forward.

2014+ Mazda 3 Suspension Kit

Need some extra handling and style for your Mazda3 but don’t want the hassle of lowering springs? We have created a kit that includes the CorkSport lowering springs, adjustable shocks/struts, and camber plates all assembled with OE accessories and ready to install. No spring compressors needed, for ease of installation. Coming soon…

2014+ Mazda 3 Front Sway Bar

Reducing overall roll or “sway” can drastically change your Mazda’s handling characteristics. We should be receiving our first prototype to test fit on our Mazda3 any day now are excited to see how it complements the CorkSport rear sway bar. Oh, and the new front sway bar is 3-way adjustable just like our ND Miata sway bars!

2014-2016 Mazda 3 Steering Wheel

Last, but not least, our leather steering wheel will be making a comeback in the coming months. Featuring a similar profile to the CorkSport Mazdaspeed3 steering wheels, it is designed to increase confidence in both aggressive and daily driving while staying comfortable and stylish.

As you can see, we are staying busy with the newest generations of Mazda here at CorkSport, but that doesn’t mean it’s the only thing we are focused on.

We still have plenty of upcoming products for you Mazdaspeed guys and gals, and for some platforms you may not be expecting. Keep tabs on the CS blog, Instagram and Facebook page to make sure you don’t miss anything!

Until next time,

-Daniel @ CorkSport

The Mazda 3 Rear Motor Mount 2.0: Back & Better

We here at CorkSport are proud to announce the relaunch of the Mazda 3 Rear Motor Mount.

Yes, you read that correct, this is a re-launch. At CorkSport we push ourselves to design and develop new and interesting products every day, with that, we try new and innovative manufacturing designs and methods in an attempt to create exceptional, competitive, cost-effective products for our loyal customers.

Sometimes those new and innovative manufacturing methods end up not being as awesome as we originally expected. This is just part of the designing and learning process. Let’s get into the details.

The original, let’s call it V1, Mazda3 RMM used a new-to-us manufacturing method of applying the polyurethane to the billet aluminum body called vulcanizing. The billet aluminum body and the steel sleeves are mounted in a fixture then liquid polyurethane was poured into the assembly and cooled until the polyurethane had set to the final hardness.  This process appeared to be very promising; each part was set up identically, it was nearly impossible to have any missing parts not sent to you, and most importantly the polyurethane was adhered to the billet aluminum body and therefore could not fall out.  More on that last bit later.

We moved forward with the manufacturing method and had a few samples made with various polyurethane durometers ranging from 60A to 80A.  After various testing, we determined that 70A was the best compromise of response and NVH (Noise, Vibration, Harshness) experienced by the driver. We continued testing for a few months to verify long-term durability and found no issues.  Hooray! We moved forward with production to get this new great Mazda6 RMM out the door to you.

Unfortunately, it appears that our testing period just wasn’t quite long enough.  Eventually, the polyurethane would fail but fail in a style we had never experienced before.  Long story short, polyurethane has excellent compression strength compared to the tensile strength.  The polyurethane was being pulled/split apart due to the forces of the engine.  

Now we had a few options of how to redesign the Mazda 6 Rear Motor Mount after going through the failure analysis.  

  • We could have simply stuck with the same design and just increased the stiffness of the polyurethane.  Increasing the durometer rating of the poly increases the tensile strength, but this would have resulted in an unsatisfactory driving experience for you which was unacceptable.  
  • The other option was to start from scratch again to create a new design that did not compromise the driving experience or the durability; with challenge comes innovation.

Again we went through many different designs, with the greatest challenge coming in the form of retaining the polyurethane pucks.  Typically the polyurethane pucks are retained by whatever the mount is bolting to, but with the Mazda motor mount, the steel sleeves extend far past the outer edge of the polyurethane pucks.  This leaves the pucks free to slide out of the billet aluminum body and cause a major failure.  

Using the conventional polyurethane puck style, we developed a design that would work, but more than doubled the number of parts needed which increased the chance for something to go wrong and drives up the cost.  This design is shown below:

 

The red arrows show the direction the conventional polyurethane puck would slide out of the body.  The red circles show the puck retention system to hold the washer and pucks in the body.  This retention design required many parts to be successful.

With the cost going through the roof we had to go back to the drawing board. There had to be a better way… and there was.  

The third major iteration shown above solved the problems of the V2 design and got us away from the vulcanized polyurethane of the V1 design.  Things were looking good.  With the V3 design, the polyurethane pucks are pressed into the billet aluminum body.  The pucks have ribs, shown with the red circles that are just large enough to keep the puck in place, but small enough to let the puck be pressed into the body.  

With this, we were able to make some clever designs to the RMM to keep it centered in the engine and chassis brackets on the vehicle.  The smaller diameter puck extends out to the ends of the steel sleeves; this keeps the entire rear motor mount centered.  The large diameter puck retains itself in the body and allows the associated steel sleeve free to slide for easy installation; shown with the red arrows.

Now… does it work? YES! Pretty fantastically, we might add!  

We have had this design on a handful of vehicles, one of those being the CorkSport Mazda 3 Racecar during the SCCA Run-Offs at Indianapolis Speedway.  Other than some dirt and grime, the tested RMM looks great.  

You were probably expecting this blog to be all about the details and reasons you should buy this performance RMM for your Mazda 3, Mazda 6, or CX-5.  All those details can be found on our website, and I invite you to check them out.

What we really want to get across here is this:

First and foremost, we will always do the best we can to take care of you and your car if there is ever an issue or concern with your CorkSport part.  

Second, if you are a driving enthusiast, if you go driving for the sake of just driving, then you need this RMM in your life. It will completely change and improve your driving experience, plain and simple.  

-Barett, CS Engineering

 

The First CorkSport Branded Ride Mod + Vote For The CBR Graphics!


For those of you who have forgotten or who did not see the initial post we recently purchased a brand-new 2018 Mazda 3 Hatchback. Dubbed the CorkSport Branded Ride (CBR), we set out to start making it less like your mom’s car and more like something that suits the CorkSport name.

We turned to you all for suggestions and got some great feedback. We heard everything from wide bodykits, “slam it to the ground”, turbos and engine swaps, to easier mods like wheels, coil overs, and a new front lip.

We’re sure you’re anxious to find out where we’ve started: Intake? Exhaust? Springs? Our choice might surprise you.


But before we dig in to the first mod for the CBR, we first want to give you guys an opportunity to do something really fun:

Vote To Pick One of The 4 Graphic Concepts For The CorkSport Branded Ride!

Following up on our introduction to the CBR, our team here has decided to involve you guys in a whole new level of making this car look sick: Body Graphics!

Not only are we asking of your ideas and feedback for the mechanics of the CBR, we want you to decide on the aesthetics too. We want YOU to choose what this things actually looks like.

 
Our design team has developed 4 different concepts for the CBR graphics, and we must admit, they look pretty sweet. The concepts bring in a bunch of different styles, from racing to street, and are sure to make this baby an attention-grabber.

Here’s where you come in: We need you to cast a vote for your favorite concept for the CBR.

A few different ways you can vote:
  1. Repost a pic of your favorite concept with #CorkSport & #CorkSportCBR on social media so we can see your vote. Then, tag a friend and ask them to pick their favorite!
  2. Comment on one of our CBR social media posts for your vote with #CorkSport & #CorkSportCBR.
  3. Leave a comment on this blog post with your vote.
Here’s an example:
“So stoked to get to pick the design of the #CorkSport Branded Ride! My vote is on Concept #3 for sure. – @TagYourFriend, what’s your vote?? #CorksportCBR”

We will gather votes together and whatever concept the CorkSport Community chooses will ultimately be brought to life on the real CBR!


Now, on to the First CBR Mod:

 
We did not want to go crazy right off the bat, so we looked at where the average Mazda 3 owner might start. Maybe a license plate kit, short ram intake? Catback exhaust? Lowering springs? – All good guesses.

We decided to go for a reliability mod that many people may not consider right away: a CorkSport Oil Catch Can kit.

Now, why would we install this right away on a brand new car? It shouldn’t have any issues with engine health. – Well, that’s the exact reason we installed it.

If it doesn’t have any issues right now and the engine is clean and new, then why not keep it that way?
As an engine operates, oil mist, fuel vapor, water vapor, and other gases can pass from the crankcase to the intake using the stock PCV system. Over time, as these gases condense, they form gunk and carbon buildup on valves, piston tops, and other vital engine components. An oil catch can exists to catch all of the oil mist and other vapors before they get back to the intake and dirty all of the nice clean engine components. Additionally, these other gases do not do any favors to the combustion cycle. – Just ask anyone who has emptied one during an oil change; what an OCC collects is pretty nasty.

Now let’s get to the install.

Locating the can itself is a snap, and finds a home in the driver’s side fender well. Routing the hoses is the difficult part, surprisingly, as you have to gain access to some of the factory PCV hose. This means removing the air box, intake tube, and even the starter. Once the factory hose is removed, the new hoses are installed and routed to the OCC.

Finally, we added the ball valve to the bottom of the CorkSport Oil Catch Can, which means next time the CBR needs an oil change we have an easy way to drain the OCC as well.

So what’s next for the CBR? That’s completely up to you!

Help us decide by submitting ideas for what YOU would do if this was your car.
REMINDER: We will give you cred for submitting an idea that we use for the mods. In short: This means Your Name will actually be put on the CorkSport Branded Ride!
Stay Tuned, you’ll be seeing more of the CBR soon.

Remember to cast your vote for the CBR Graphics!

Again, here’s how to vote:
  1. Repost a pic of your favorite concept with #CorkSport & #CorkSportCBR on social media so we can see your vote. Then, tag a friend and ask them to pick their favorite!
  2. Comment on one of our CBR social media posts for your vote with #CorkSport & #CorkSportCBR.
  3. Leave a comment on this blog post with your vote.