Mazda Intake System Design: Part 1

photos of short ram intakes for Mazdas



In the last few months, we’ve invested a good amount of time into working on making our intake systems more modular. The benefit to our customers is that we’re dialing in the building blocks to roll out a number of new intakes that will backfill our inventory for vehicles that we haven’t supported with induction systems. At the same time, having modular systems allow us to get better material pricing, and invest less in mill and lathe setup times by using like parts across multiple make and model product lines. We have also sourced custom filters from one of the top domestic performance air filter manufacturers and we’re very excited about cultivating that relationship.

As our intake product line becomes more modular, we become more able to tailor our intakes to our customer’s interests and styles as well. With our new anodized MAF housings and custom CorkSport synthetic media air filters, we have new opportunities for configuring color options. No matter how much of a function-over-form kind of person you are, a product that looks cool while it does a top-notch job is always better than one that looks like it was made out of scraps from the appliance aisle at Home Depot. We know you want your car to not only look good, but to make your car your own, and utilizing like parts and manufacturing techniques across multiple model product lines will allow us to give you higher levels of customization. Bottom line – tell us what you want your parts to look like. Have an idea for how to make something more customized or unique to the person who is buying the parts? Use our product submission form and let us know what you want.

Cutting Edge R&D

Airflow design of the Short Ram intake



On the R&D front, we’re utilizing some cutting-edge techniques in computational flow dynamics and test equipment so that we can gather data from our existing intake systems and build complex computer models that will allow us to rapidly prototype and develop new intake systems as well as other induction systems to improve the performance of your Mazda. As we move into mastering some of these techniques, we’ll become more and more able to intuit ways to improve the flow of gasses through your engines. In this respect, intakes are unbelievably simple, but a number of factors can cause pressure drops across the length of the intake and effectively act as the same thing as a restriction in the system. We’ll talk more about that in the next few installations of my intake system-related blog posts.

The most important goal for us at CorkSport is to meet your needs for quality performance parts that match the style and aesthetic appeal you’re seeking when you modify your cars. While I aspire to have a decent capability to design trick parts, my input alone on what our systems should look like most certainly isn’t enough – we need your input. Just have a small comment about a color or variation you’d like to see?

Also, if you’ve got a 1999 or later Mazda in need of an intake and live in the Portland, Oregon area, let us know – we’re always looking for cars to use during our prototype and development process. We’re specifically looking for Mazda 6’s, 2007-2009 Mazdaspeed 3 & 2010-2013 Mazdaspeed3 in 4 and 6 cylinder versions. I’m also looking for a 2.0 liter 2004-2009 Mazda3 and a 1999-2000 1.6 liter Mazda Protรฉgรฉ.

On and off in the next few months, I’ll be discussing more about intake design: Differences between long tube cold air intakes and short ram intakes, filter selection and misconceptions, factory warranty concerns, effects of water in the combustion process, our testing and validation process and the tools we use to get the job done right. Hell, I might even go into some details of some of the modular intake manifold designs and concepts I’ve been toying around with for my own cars that might show up in our product line come next summer.

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CorkSport Dyno Day

Last Saturday at our CorkSport Swap Meet, we had a great turnout for the Dyno Testing. With 16 people signing up ahead of time and 5 signing up on site, we got some great runs in from a diverse group of participants. We even felt sorry for a handful of non-Mazdas and let them participate as well!

DYNODAY
High horsepower of the day was Jason O’Neill with his ’01 Miata. Jay’s car made 393hp to the rear wheels with a brutal 368 ft lb of torque. A week earlier he had the motor out to diagnose some issues with the variable valve timing as well as try to get the head into the shop for new valve guides and seals and couldn’t make it in time so he threw it back in just to drive down to the event on a set of beefy drag radials. Later in the evening he ran an 11.51 at 124mph out at Portland International Raceway. Brutal. I’ll say this much, when a lightweight little Miata pushing 400+hp (it was uncharacteristically chilly out Saturday night) on a cold track makes a 1.6 second reaction time, it’s driver has had some practice. Hats off to Jay for his awesome car and sticky launch skills.

Close behind was an LS2 powered FD RX-7 that was unbelievably clean. The install was gorgeous, with little over 1000 miles on the clock since the swap, and the powerband was equally beautiful. Dropping an Earth shaking 300ft lb of torque at 1600RPM and following that up with a 45 degree horsepower curve topping out at 376hp, this car would be more adrenaline pumping fun than a barrel of monkeys in an AK-47 factory. And the owner’s passion for Mazdas goes way backโ€ฆhe bought an FD off the lot new in ’93 as well. While purists will wince at the addition of Chevy Power to one of the crown jewels of Mazda’s Rotary history, I would guess anyone who saw the meticulous install and the owners passion for making this an all around amazing car would give it a thumbs up. The drivetrain wasn’t the only amazing thing about the car – the suspension and bodywork were phenomenal as well.

We had a pair of Speed3’s and a Speed6 on the dyno as well, with high HP numbers in the high 260’s and high torque numbers in the high 290’s. The dyno runs on these cars are all over the map, preferencing torque on one run, horsepower on the next. One car ran 257HP w/ 296ft lb followed by a run of 269HP w/ 282ft lb. And I always thought the less the driver could effect the run the more consistent the output would be – not so with the MZR 2.3 DISI powered sedans.

The rest of the pool consisted of two FS Powered Mazdaspeed Protรฉgรฉs, a BP Turbo Powered Protรฉgรฉ, Four Miata’s and two eardrum scalding FB RX-7’s that both gave the LS2 a run for its money for smoothest powerband.

All in all it was a great day, and we had some good opportunities to talk shop and discuss opportunities for more power. The Seattle area group from MazdasNW.com came down and were able to meet up with more of the folks on the forum who are from the Portland Area. All in all, it became clear that a lot of these Mazda enthusiasts are hungry for opportunities to spend time discussing their wrenching projects and spending time with like-minded people. I look forward to future opportunities like this. Thanks again for everyone who came out to the eventโ€ฆwithout such great participation, none of us would have had as much fun as we did.

P.S. If you have video of your car on our Dyno during the CorkSport Dyno Day and it’s not included in the above video playlist, fire over a copy for me and we’ll add it! Sorry for not getting all of the cars on video, I had a few different hats I was wearing and wasn’t able to get them all.

CorkSport September 2009 Swap Meet and Dyno Day

We had our swap meet and dyno day on Saturday the 19th. The weather for the day was pretty ominous with rain forecasted from early morning to around noon and it was right on. At 6am the rain started up but that didnโ€™t stop us from getting the event going.


10am with the rain coming down


Alan Webb Mazda showed up at the event early and brought along some parts to sell at a discount and a new 2010 Mazdaspeed 3 to show off. We had the swap meet spaces in doors to keep people dry during the entire day. There were lots of good deals to be had at the event that we offered and other people brought as well.


People checking out the deals (including the sweet RE-Amemiya MS3 hood)


We had almost the entire Mazda range of models represented at the event. All models of Rx7s, Rx8s, Mazda Proteges (new and older models), Miatas, Mazda 6s, and Mazda 3s.


Scottโ€™s FC with the drift damage can be seen at the right (Scott too)


The dyno event had 20 cars on run on it during the day. The best power made was a NB Miata with a GT3076R turbocharger at 400 wheel hp. The car is very un-assuming until the driver hits the throttle.


The biggest dyno number of the day went to the red Miata above.


The day even had a few surprises in it too. The 1st gen Rx7 after its dyno run drove around the parking lot and the tie rod end broke. After a quick assessment and help from CorkSport the tie rod end was repaired and the car was back on 4 wheels. Thankfully it happened in our parking lot and not on his drive home.


Oh Snap!


Thank you to everyone for coming out and making the event despite the not so pleasant weather early in the day. I would like to mention a special thanks to Alan Webb Mazda for braving the weather and to MazdasNW group for driving down from the Seattle area.

Derrick

Mazdaspeed Product Testing Has Never Been So Fun!

I have finally got some time to polish the washer behind the steering wheel on the 2010 Mazdaspeed 3, and I can, without a doubt, say it is an unbelievably fun car. I come from a world of cars that have an immense amount of what I like to call ‘Soul.’ Meaning they’re rickety and loud and generally belch mass quantities of fuel out the tailpipe on tipping into the throttle after 7500rpm decel because the 45mm Weber DCOE’s are washing the cylinder walls down like a firehose. So, for me, driving a refined car is usually an exercise in complaining about how quiet it is or that it doesn’t have enough of this so-called ‘Soul.’ This means I feel out of place because I’m actually in a nice car that behaves like it should and also accelerates and handles like a monster. It’s my exercise in self-justification that my 70’s and 80’s cars have something that replaces the refinement that I am so dearly missing.

2010-2013 Mazdaspeed 3

During the product validation phase for our Power Series Intake System we found that the 2010 Speed3 has a very low tolerance for improved intake designs – the window for fuel trim on the 2010 seems to be far narrower than it was with the 2007-2009 Speed3. And the car runs pig-rich at wide open throttle from the factory, and from what we can tell Mazda wants to keep it that way. Which is ridiculous – maximum best torque isn’t made at 10:1 AFR. We have managed to design a system that pushes the envelope for power and also resides at the upper end of the safe zone as it relates to ECU Long Term Fuel Trims (LTFTs). This required us to spend a lot of time behind the wheel with an OBD2 datalogger to gather data off the 2nd Gen. ECU. We’d then head back to the lab to crunch some numbers and improve our understanding of what the ECU wants to see, what factors effect that and how to manipulate them for safe running and excellent power while simultaneously avoiding the dreaded CEL/MIL light. And no, the first step of the install instructions aren’t ‘Remove Gauge Cluster and cut traces on Tachometer circuit board that lead to check engine LED.’

But wait, this technical background story is nothing compared to the best part – all those hours behind the wheel!! After countless hours of punching up and down the freeway at various levels of cruise, I switched gears and took the 2010 out on one of my favorite loopsโ€ฆ Until this point, I hadn’t had a good opportunity to really see what the car was capable of, as most of my time in it was on commutes and around town driving.

For those of you who aren’t familiar with where we’re located, CorkSport is in Vancouver, Washington – right across the Columbia River from Portland, Oregon. Vancouver is in the shadow of Mt. St. Helens, the cascade range volcano that blew 2000′ off its top in 1980. I live about halfway between Mt. St. Helens and Vancouver, and the North Clark County area has an amazing array of roads snaking over the landscape. Banked 180-degree curves abound, and just when you’re ready to pull over and lean your head out to paint the tarmac with your lunch, the road opens up to 1-2 mile straights that give your inner ear the slightest respite prior to wrapping right back into beautiful Nurburgring-esque sweepers among gorgeous green foliage and narrow cliff-lined lakes.



The Speed3 performed phenomenally. There were plenty of areas for improvement, what with it having stock suspension, no strut braces, factory tires, etc. For the most part, however, it was a blast to drive. The factory brakes are surprisingly capable and the transmission gearing is perfectly matched for putting lots of power down through the curves and even more as the straights open up. The engine management provides a very crisp deceleration with its overrun (deceleration) fuel cut algorithm. There were a number of times when I had to remind myself that I was simply going way too fast and back off in areas where sight distance was limited, but the car is so smooth to accelerate through 2nd, 3rd, and 4th that it’s hard to realize you’re doing 90-100mph.

Coming from a predominantly rear-wheel and all-wheel drive background, the Speed takes some getting used to when hammering it around corners, laying down 300lb-ft of torque. In sharp turns under acceleration, the massive torque-steer requires some elbow grease to reorient the treads to follow the road, but the benefit gained on big sweepers is well worth the tradeoff provided in the FWD drivetrain configuration. This is a wonderful car, and if you can get past the torque steer and not be bothered by it (which takes very little time from what I’ve found), the benefits had from the power that causes it far outweigh the initial surprise of how heavy-handed the car can be under certain conditions. But for me, the torque steer is an excellent addition – I think I have slowly identified that what I see to be the feeling of ‘Soul’ in a car is really just elements of a visceral experience – and the torque steer is the only unrefined and live thing about the car that reminds you that you’re not driving your girlfriend’s Jetta. As automotive enthusiasts, we long for these elements in our cars, which is why we love to modify them – a throaty exhaust system and an intake / turbo inlet that allows you to hear the turbo spool up both go a long way to bringing your Mazda’s Soul out of its cage and to the surface.

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2010 MazdaSpeed3 First Dyno Results

MazdaSpeed3 Dyno



I just got the 2010 Mazdaspeed3 off the dyno after doing some installs and have some results to share.

The Dyno run went great for the 2010 MS3. It’s bone stock with three mods – CorkSport Power Series Racepipe (80mm with factory 65mm outlet) and CS Power Series Intake w/ Turbo Inlet and a set of CorkSport Motor Mount Inserts. Each of these products will be released shortly for the 2010 MS3 including some revised design considerations for the new 2010.

The stock baseline numbers for the 2010 were 231hp 269tq (73.8F/45%Humidity). With the two mods, it hammered down 272hp and 301tq (78.7F/43%Humidity).

41hp gain, 32ft lb of torque. Boost went from factory 16.4psi to 18.6! Can’t wait to see what it picks up with the downpipe.

If you have a Mazdaspeed3 without any exhaust modifications or haven’t added an intake or a turbo inlet pipe, hit me up…there’s power on the table right in front of you.

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