Corksport Q&A
You had questions, we had answers. Here are the top 7 questions we found on Facebook, Instagram, and Twitter:
Question: What would be involved/required for CS to develop injectors for the MS3/6?
- Questioner: Vincent Pham
- Answer: Fuel injectors, especially direct injection, are complicated high-precision electromechanical devices. A project like this is outside the “normal range” for a small company like CorkSport; therefore, we would have to team up with an injector manufacturer like Bosch to tackle this project. We would also need lots of money. Even with these huge hurdles to overcome, we are investigating the project.
Question: What’s the most power you have seen a SkyActiv-G engine put down?
- Questioner: Shane Foster
- Answer: I haven’t heard of any high-power SkyActiv-G, and we probably won’t know for some time, unfortunately. Currently, the 2.5L SkyActiv-G engine produces 165hp at the crank, which is nothing to brag about in a market full of 300hp turbo 4-cylinders and 600hp V8s. Although the SkyActiv engines do have something to brag about, they are some of the most technologically advanced engines on the market. With a 14:1 compression ratio, direct injection, and variable valve timing that’s designed to run on 87 octane fuel, there is huge potential for power. CorkSport has an eye on this potential. For more in-depth information, check out the link below.
Question: Best way to clean carbon on the direct injected cars without pulling manifold and media blasting them?
- Questioner: Alex Gonzalez
- Answer: From my research and personal knowledge, everybody has their own method for better or for worse. One method is to use a ½” diameter hose attached to a shop vac and scrap away, but I don’t recommend that. Another method is to use the PCV port on the intake manifold to slowly suck Seafoam into the intake runners, but again I can’t say I recommend it. You can’t control how much or which ports it goes through and the idea of running something other than gasoline through the combustion chamber bothers me. Ultimately, you should remove the intake manifold and then clean it with a heavy-duty foaming engine cleaner. This will also give you a chance to inspect the intake valve and I do recommend purchasing an EGR delete kit.
Question: What oil should I use in my speed?
- Questioner: Alex Duran
- Answer: Alex, you really want to stir that pot? O-well, let’s give it a shot. I personally run Mobil-1 Full Synthetic and half a quart of Lucas Oil Stabilizer for 3000 miles. I’m not going to recommend a specific oil, but I will say this. You should run a full synthetic oil and quality oil filter. The oil should be SAE certified and have the manufacturer’s suggested viscosity or be slightly thicker. I say slightly thicker because I have found good results when doing so with higher-than-factory horsepower setups and in severely worn engines.
Question: Think you guys will ever offer full performance engines and components. I.E. big valve head, billet cranks, high comp pistons, or a 2.5 bored to 2.7 with all that plus cams?
- Questioner: Colt Krahwinkel
- Answer: I’m going to assume this question is directed to all recent Mazda engines for the sake of variety. Unfortunately, we have no plans for the naturally aspirated SkyActiv-G engines other than bolt-ons; there just isn’t a big enough market for that investment. As for the DISI MZR engine, we have produced camshafts and plan to re-release those in the future. Other bolt on’s are either already done or planned, maybe even a turbo, but we don’t plan to get into the engine internals.
Question: How well might breathing mods affect power on the Mazda 2? Say CorkSport SRI, Headers, and CorkSport exhaust?
- Questioner: Mike Wildt
- Answer: With the combination of those, the highest gain I would expect on a Mazda 2 is 20hp. The exhaust manifold would show the biggest gains, followed by the SRI. The exhaust system will give marginal gains, but a little grumble is always nice.
Question: Why do you highly recommend resonated over straight pipe? (Referring to the Gen2 Mazdaspeed 3).
- Questioner: Phil Young
- Answer: This can be a very biased opinion and is probably the most highly debated subject among all automotive enthusiasts. Despite that, I will try to throw in some facts. Personally, I can’t stand an exhaust system with an excessive drone. If you can barely hear your passenger, then what’s the point, right? That’s why resonators are important and why I should define the difference between resonators and mufflers. Resonators are typically canisters with strait-through design and perforated tube and packing material. Mufflers generally are canisters with chambers and baffles that divert flow. The resonator does not reduce the grumble of the exhaust that we love; it targets specific frequencies that cause the annoying drone. Mufflers are the opposite. Also, we have had many customers order the strait pipe exhaust system to return it for the resonated exhaust later.
Thank you for your questions, and keep them coming. We’ll have a Q&A every month for your Mazda performance questions.
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