4th gen ND Mazda MX-5 Miata

[nikitopo]

Originally Posted by mrg666

I don't believe your engine mods made any significant changes in power. There is no proof. Looking at your build thread they are just expensive nonsense. If you really saved 200 pounds, which I don't believe either, the acceleration difference cannot be better than 7% (200/2800*100) using f=ma equation. Keep posting but I will be ignoring all your posts from now on.

I don't care. Do whatever you want and believe whatever you like. I've been polite to you and you raised twice the bs flag? I have my arguments and my measurements. You don't have anything apart from ignorance and it looks that you have a behavior problem too.

[why?]

Originally Posted by mav1178

Yes, but how many of these are without a catalytic converter?

A catalytic converter is still vital to reduce CO and NOx emissions. There's no other solution out there that is as simple and as cost effective.

you say such things with zero proof. catalytic converters are ancient tech. The only reason they are still there is because by regulation they have to be there. I know we could find something better if we let automakers do their jobs instead of regulating specific antique tech into vehicles.

[krayzie]

Originally Posted by why?

catalytic converters are ancient tech.

You don't always have to replace your so-called ancient tech. It can be improved upon.

http://www.mining.com/new-toyota-tec...lladium-price/

Electric cars are "ancient tech" as well since they had them in the 19th century. It's not government regulations that need to be rid of, but fascist corporatism.

[why?]

Originally Posted by krayzie

You don't always have to replace your so-called ancient tech. It can be improved upon.

http://www.mining.com/new-toyota-tec...lladium-price/

Electric cars are "ancient tech" as well since they had them in the 19th century. It's not government regulations that need to be rid of, but fascist corporatism.

The problem is it is still a cat, and while you can kinda sort patch it, you cannot change the basic crappy tech.

There is zero things the same from a modern electric compared to what they were doing in the 1890's. And if Toyota can really get solid state batteries production usable, maybe electric cars might have a chance to become feasible for normal people, and odds are every car would have a battery in it to help with gas mileage in some capacity. Still kind of doubt it, electric cars will most likely go the way of steam powered cars once more.

[krayzie]

Well corporations are not setup to be charitable organizations. I'll just leave it at that.

[mav1178]

Originally Posted by why?

you say such things with zero proof. catalytic converters are ancient tech. The only reason they are still there is because by regulation they have to be there. I know we could find something better if we let automakers do their jobs instead of regulating specific antique tech into vehicles.

I don't need to provide proof... you're the one who said the following:

We have modern day gas vehicles that actually put out air cleaner than what they take in. Volvo especially was having fun advertising that fact. If we can do that, why do you think we cannot come up with something better? A carb is tech from the early 80's. Not much else from then is in common use today for a reason.

I asked you, how many of those Volvo cars were running without a cat? That's all I am asking.

As for my comment, it's based in reality and truth. If there was a better/cheaper solution to reduce emissions other than a cat, you'd think automotive corporations would've done it by now... but it's "government regulations" getting in their way.

A truly smart company would come up with something innovative, cheaper, patent it, then lobby the government to bend the rules in their favor so all parties benefit. I have yet to see any new tech that can do what a current generation catalytic converter does.

As for the CO and NOx comment, it's there because it's true, those are two major components of your typical exhaust stream.

[ZDan]

Cats are cheap, they work, and they don't cost much if any horsepower. I had to get them to pass emissions on the V8 FD, they cut my HC, CO, NOx tremendously, like by factors of 4 to 8, car no longer smells, and no detectable loss of power.

[WolfpackS2k]

Originally Posted by mav1178

As for the CO and NOx comment, it's there because it's true, those are two major components of your typical exhaust stream.

FYI, if CO and NOx are "major components" of your exhaust before it's treated by a cat then you've got a piss poor engine tune. CO is a product of incomplete combustion and NOx are caused mainly by pre-denotation.

[Tcoat]

Originally Posted by ZDan

Cats are cheap, they work, and they don't cost much if any horsepower. I had to get them to pass emissions on the V8 FD, they cut my HC, CO, NOx tremendously, like by factors of 4 to 8, car no longer smells, and no detectable loss of power.

Actually cats are one of the most expensive single components of a car due to the use of platinum, palladium, and rhodium which is are all noble metals. They however work very well and that makes them cost effective.

[Entroper]

Quick update: https://www.roadandtrack.com/new-car...werful-engine/

• Lighter engine internals (surprising, as the existing internals are pretty light)
• Bigger intake and exhaust ports (not surprising, the existing head has poor flow)
• Bigger cam
• New throttle body
• Better flowing intake and exhaust

This seems pretty confirmed, and the way they're doing it makes sense. Mazda has previously said that the Skyactiv-X will not go into the ND. And all three past generations of Miatas have received incremental upgrades to the engine. This is nothing new or out of the ordinary, it's to be expected.

I agree with krayzie -- Mazda originally designed this car for the 1.5 L Skyactiv, and they tuned that engine for higher revs than the standard 1.5 Skyactiv that comes in their other cars. They're now doing the same thing for the 2.0 L Skyactiv.

[mav1178]

Originally Posted by WolfpackS2k

FYI, if CO and NOx are "major components" of your exhaust before it's treated by a cat then you've got a piss poor engine tune. CO is a product of incomplete combustion and NOx are caused mainly by pre-denotation.

I should've said "major contributors to air pollution out of your tailpipe", not talking in general about what's coming out.

And I'm only referencing stock, unmodified engines. Catalytic converters are old tech, but they are still the most cost-effective way to reduce tailpipe emissions that aren't water and CO2.

[why?]

Originally Posted by mav1178

I don't need to provide proof... you're the one who said the following:
I asked you, how many of those Volvo cars were running without a cat? That's all I am asking.
As for my comment, it's based in reality and truth. If there was a better/cheaper solution to reduce emissions other than a cat, you'd think automotive corporations would've done it by now... but it's "government regulations" getting in their way.
A truly smart company would come up with something innovative, cheaper, patent it, then lobby the government to bend the rules in their favor so all parties benefit. I have yet to see any new tech that can do what a current generation catalytic converter does.
As for the CO and NOx comment, it's there because it's true, those are two major components of your typical exhaust stream.

Sorry that is just not true. Since that cat itself is mandated, not just a specific air quality level, no one is going to try different things. If the only thing that was mandated was air quality levels, it would be a totally different game, and would actually let auto companies do their thing.

Just like air bags are mandated. We know they've murdered people, yet because the specific device is mandated it is in every single vehicle and it is how every auto company starts their safety programs. If they just mandated a specific score on safety tests, maybe someone figures out how to fix the fact that airbags can easily murder people.

[Tcoat]

Originally Posted by why?

Sorry that is just not true. Since that cat itself is mandated, not just a specific air quality level, no one is going to try different things. If the only thing that was mandated was air quality levels, it would be a totally different game, and would actually let auto companies do their thing.

Just like air bags are mandated. We know they've murdered people, yet because the specific device is mandated it is in every single vehicle and it is how every auto company starts their safety programs. If they just mandated a specific score on safety tests, maybe someone figures out how to fix the fact that airbags can easily murder people.

We have been down the airbag route before. First off murder implies intent and not one airbag ever has had any kind of intent. Next up the recorded cases of properly built airbags causing death are next to zero. The untold millions of lives they have saved more than cancels out even the fatalities caused by the defective ones. This has been proven time and time again. To think anything else is not even reasonable.
As far as cats go they consist of one small sub section of any emissions control requirements and if somebody came up with something that does the job it could be added to the list of accepted devices in a heart beat. Nobody has come up with anything that matches them yet is all.

[gymratter]

There's a telescoping steering wheel, too.

The rumors of Mazda developing a far more powerful MX-5 Miata were true. Japan's Car Watch had the opportunity to drive a prototype for the massively updated roadster, and the publication divulged all the details. The 2.0-liter four-cylinder now packs 182 horsepower at 7,000 rpm rather than 155 hp at 6,000 rpm in current form. Torque grows slightly to 151 pound-feet (205 Newton-meters) of torque from 148 lb-ft (201 Nm) in the existing model.

To achieve such a significant power bump, Mazda overhauls the powertrain. New pistons are 0.95 ounces (27 grams) lighter, and the connecting rods weigh 1.4 ounces (41 grams) less. To breathe better, the Miata's engine has a larger diameter throttle body, bigger exhaust valves, and wider exhaust piping. The improvements let the redline rise to 7,500 rpm from 6,800 rpm on the existing roadster. In addition to more power, the tweaks also allegedly improve thermal efficiency and lower emissions, according to Car Watch. A dual-mass flywheel is among the new pieces, too.

While the engine is the heart of a sports car, it's not the only thing that matters. Mazda's engineers install softer suspension bushings at the back, which allegedly improves steering feel. Inside the cabin, drivers get a telescoping steering wheel for the first time in the Miata. According to Car Watch, it has 1.2 inches (30 millimeters) of adjustment, in addition to the existing tilt function that can move 1.7 inches (42 mm).

The photos from Car Watch's story don't show any major styling changes for the Miata. However, it does mention minor aesthetic tweaks like availability of a caramel brown top, tan leather interior, and bright finish for the wheels.

Now, here's the somewhat bad news. Motor1.com reached out to Mazda's representatives in the United States to ask about these changes for the American region. "As standard policy, we do not comment on speculation or future products that have not been announced for our market," the automaker responded.

It seems highly unlikely that Mazda would invest so much into upgrading the Miata and not bring the changes stateside. However, the automaker is remaining mum about when the arrival might happen.

https://www.motor1.com/news/245277/m...update-report/