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

 

Introducing: The CorkSport Performance Polyurethane Exhaust Hanger Kit

The exhaust system on your Mazda is a loved and cherished part of your car’s character and performance.

It emits glorious sounds that keep you entertained and smiling from ear-to-ear, but if you can believe it, is only attached to your Mazda by a few soft rubber hangers.

Yes, your hard earned stainless steel exhaust is ONLY suspended by small pieces of rubber…

Here at CorkSport, we think it’s time that you show your exhaust system some love… it’s time to take the rubber off.

We present to you: the CorkSport Performance Polyurethane Exhaust Hanger kit.

This kit replaces the four rubber exhaust hangers that would otherwise be used to mount and suspend your CorkSport Performance Exhaust System; the two rear hangers on the axleback section and the two mid-pipe hangers.

But why is polyurethane better?

Well there’s a few reasons:

  • First, polyurethane is more durable and heat resistant than rubber so the hangers will perform better for a much longer period of time.
  • Second, and most important, the polyurethane used in the CorkSport Performance Kit uses a stiffer compound compared to the OE. The polyurethane hangers have 75A durometer stiffness vs the OE rubber at as low as 50A durometer. The increased stiffness helps minimize the movement of the exhaust while still providing the necessary flex between the car chassis and the exhaust system.

All-together, this means your performance exhaust system for you Mazda 3, Mazda 6, or Mazda CX-5 will not be able to move around under the car during spirited driving such as back roads, auto-crossing, or whatever motorsport event you prefer.

Keeping your exhaust system in places reduces your chance of damaging your beloved Mazda or the exhaust; it’s a win/win.

-Barett @ CS

PS: In addition to these hangers, we also carry the following other exhaust hanger options:

The Wait Is Over: The CorkSport Performance Intake Manifold Is Here

Can you believe we started this project back in 2012?

Yes, it’s been a long journey, and a few too many “two weeks”, only to find that more improvements were needed. We’ll be frank, this has been a challenging project to tackle, but we have prevailed. We have pushed past the challenges faced in manufacturing the complex design, and are proud to announce that we are ready to present you with the most complete solution for the Mazdaspeed 3 and Mazdaspeed 6 platform.

The CorkSport Intake Manifold is here for those of us wanting some more flow in our lives.

Our design focuses on performance without sacrificing OEM fitment or drivability. With equal flowing runners, higher flow than OE, and TMIC fitment, it truly is a complete solution to the OE intake manifold.

Fitment is huge when it comes down to large engine components like intake manifolds. While designing the CorkSport IM, we wanted to retain as many OE features and mounting locations as possible while maintaining neat and tidy packaging. By doing so, we were able to keep components such as the TMIC, OEM throttle body, MAP Sensor, and even the oil dipstick bracket in OE locations. This all means a relatively quick and easy part to install, but we made it even easier by clearing some space around hard-to-reach areas.

The CorkSport Intake Manifold may fit like OE, but that’s where the similarities end.

The CorkSport Mazdaspeed Intake Manifold is designed with performance and drive-ability in mind, with the larger plenum design and long cylinder runners. Since the intake plenum is about three times larger than OE, there is an increase in high RPM power capacity without sacrificing throttle response and drivability. By maintaining the length of the cylinder runners (vs the typical aftermarket intake manifold), we improved mid-range power while still having peak RPM capacity with the single runner design vs. an OE split runner design.

The increase in performance also comes with an increase in engine health.

By optimizing the design for equal flow between runners, the CorkSport IM eliminates the flow imbalance of the OE intake manifold. This significant imbalance causes cylinders to run excessively lean or rich, affecting engine durability and performance. Check out the graph below to see the difference. Not only does the CorkSport Intake Manifold outflow the OE design by 70CFM per runner on average, but also significantly reduces the flow imbalance to 2% or less vs the OE imbalance of 21%.

This means your engine can run stronger, longer, and have a higher potential to make power.

But enough talk about numbers and flow, let’s SEE some numbers. The dyno graph below shows the difference before and after the CS IM on a Mazdaspeed3 with a CorkSport TD05H-18G turbo equipped. Not only was there an increase in power and torque across the entire RPM range, the turbo spooled around 100RPM faster than with the OE intake manifold.

But wait there’s more! Along with the overall design improvement over OE; there are additional design features that you need to know about.

  • Firstly, we increased the size of the throttle body opening. This allows the OE throttle body to work great but also allows for a larger throttle body to be installed without modification.
  • Next there are added fueling ports for each runner. They are standard 1/8-27 NPT ports that can be used with methanol nozzles or other fueling options.
  • Finally there is an extra 1/8-27 NPT port that can be used for boost controllers, gauges, or the like.

Now you may be thinking, “But there aren’t any larger throttle bodies available.” To that we say, “Not just YET!”

Along with the great features of this new Performance Intake Manifold, we are also providing nearly all of the hardware you need for installation; that is, the brass fittings that come pre-installed on the intake manifold and the additional hardware and hoses needed for auxiliary components.

Now we would like to circle back to where we started with this conversation:

We here at CorkSport pride ourselves in doing everything in our power to provide you, our customers, with the best possible products out there. We also are committed to being real with you guy as well, because we too are Mazda-lovers who get a thrill out of overcoming the toughest challenges that stand between us and the ultimate car experience.

The most challenging aspect of this project has been getting the manufacturing to an acceptable quality, and consistent among each intake manifold. We have tested the intake manifold on multiple cars in-house and with various beta testers, the results speak for themselves: this is an exceptional performance product that your Mazdaspeed will love to have.

Believe us when we say that this design is tough to manufacture,  and that process results in no two parts being exactly the same visually; but it also means that each manifold has its own unique look and character, the same way our cars do.

We guarantee that the CorkSport Intake Manifold will give you the best performance out there, but if for whatever reason you’re not satisfied with the unique look of your IM, please contact us and we’ll be more than happy to take care of you like we always do. – We’ve got your back!

That being said, if you’re looking to take your Mazdaspeed to the next level in both speed and reliability, the CorkSport Intake Manifold is the best comprehensive solution on the market.

These babies are only available while supplies last, so don’t wait, they’ll be gone before you know it!

Order 2007-2013 Mazdaspeed 3 & 6 Intake Manifold

 

4 inch Intake and a Clean Engine Bay? The CorkSport 51R Battery Box & ECU Relocation is NO Compromise

CorkSport is proud to announce the new ECU Relocation Battery Box designed for the 51R battery and 4” intake systems.

We love the clean and simple look of the CorkSport full size battery box and we know you do also, so our goal here was to bring that same level of awesomeness to all the big power guys and gals running 4” intakes and 51R batteries.

We knew we couldn’t compromise on the fit and finish you’ve grown to love; and this new battery box doesn’t disappoint.

The greatest challenge came in the form of locating the ECU inside the box; as that is the whole point of the CorkSport battery boxes. With a bit of massaging and adjusting, we innovated a sleek solution for the ECU placement without compromising the style and fitment of the battery box.

In the original CorkSport battery box the ECU was located on the front panel. This packaged well with the full size battery and made access easy, but in order to increase the clearance for a 4” intake system we had to reduce the width of the battery box as much as possible. This required us to rethink the location of the ECU and the overall design of the battery box to accommodate it. Check out the computer drafted model below.

Moving the ECU to the side provided ample clearance for a 4” intake system and retained the standard battery location. The front of the battery box had to be extended out a bit, but this also gave us a chance to keep the wiring harness inside the box to maintain the high level fit and finish. To finish off the installation, the battery is retained with M6 studs fastened into the battery box and a 0.120” anodized aluminum bracket.

Overall the new 51R ECU Relocation Battery Box hit all the marks for fit, finish, and performance.

 

If you’re looking to downsize your battery, upsize your intake system, or are just plain tired of looking at all those unsightly wires then let the CorkSport 51R ECU Relocation Battery Box be the answer to your goal.

Click HERE to View Product & Purchase

-Barett @ CS

Is Your Chick Flappy? – Mazda 3/MS3 Mud Flaps

Merry Christmas CorkSport family!!

Oh wait, it’s not December. It sure can feel like it sometimes when you are getting more and more parts in the mail. Am I right?

So let’s get down to business here.

This will be the one and only time you hear me say that your side chick needs to be MORE FLAPPY! If you want to protect her skirts, and booty, then making her flappy is a definite must.

CorkSport is proud to announce that we are bringing back our 2010-2013 Mazda 3/MS3 Mud Flaps by popular demand. Ask and you shall receive!

Made from 80 durometer urethane, these 1/8” thick flaps will protect all of your painted surfaces, and result in a cleaner rear hatch.

How does this really affect you? Well, have you ever tried wiping without toilet paper? I can tell you that it can be a tad bit messy. Go ahead and skip the dirty booty by adding these to your Mazda 3/Mazdaspeed 3. 2010-2013 Mazda 3 & MS3 Mud Flaps (Set of 4)

A few extra tidbits about the mud flaps:
  • Durable 80A 1/8” thick polyurethane.
  • CorkSport logo laser etched into the mud flap.
  • 2-year limited warranty.
  • $119.99 for all four mud flaps.

These are a must-have if you are trying to increase style while still being functional. I can tell you that these definitely help to keep the rear hatch cleaner makes it easier to keep the entire car cleaner for longer periods of time.

Don’t forget to check out our CorkSport 7th Gear Membership while you are buying these for your “woman”.

Cheers,

Luke