Last month, we reported on a VIN filing dug adult by Road Track that showed that a 2019 Mazda MX-5 Miata’s 2.0-liter Skyactiv-G engine would get a energy bump, from 155 to 181 net horsepower. As for how a 2019 Miata would make that additional power, we listened rumors it’d implement a new cylinder conduct permitting aloft revs, accounting for that additional power. Now we have what appears to be a leaked request from Mazda Canada display accurately where that additional energy comes from.
According to a request posted during Miata.net (registration compulsory to see a image), Mazda will change camshaft lift and valve distance on both a intake and empty side, fit freer-flowing exhaust, and well-spoken and increase a piping on a atmosphere intake side. There are also inner engine modifications: lighter pistons with reduce crowns for improved whirl in a explosion chamber, lighter joining rods, and a crankshaft offset for higher-RPM operation. All those additional revs meant additional quivering and noise, so Mazda will embankment a single-mass flywheel for a “low-inertia” dual-mass flywheel – that will try to find a good change between DMF damping movement and SMF directness. Overall, it’s a flattering critical engine rider with some driveline changes that will heavily impact a pushing characteristics of a illusory driver’s car.
James Riswick: we don’t know many about them lighter holder explosion rods, yet we for one acquire a news of some-more energy to a Miata. The burst from 155 to 181 seems like a unequivocally advantageous Mazda-like thing to do, accomplishing that charge by several aforementioned technical necromancy as against to slapping on a turbocharger, exclaiming “yee-hah” and job it a day.
Alex Kierstein: That’s true. I’m heedful of additional power, yet we do make a good prove that during slightest this is a right approach to do it. Going all-motor will keep a splendid responsiveness of a engine intact. But aloft revs competence make energy smoothness peakier. Frankly, I’d be ok with relocating a torque and horsepower peaks adult a bit in a rev range, creation it a bit some-more work to entrance a engine’s honeyed spot. The dual-mass flywheel should also assistance if low-end torque suffers, so reduction stalling in traffic.
JR: Did wonders in a 911 and 718s.
AK: And, as we were observant to me earlier, no turbocharger plumbing means reduction additional weight. How’s it review to a Mazdaspeed chronicle of yore?
JR: Well, let’s go to Screen #1! Mazdaspeed Miata of Yore constructed 178 horsepower and 166 pound-feet of torque, and weighed 2,529 pounds. The 2019 will furnish 181 hp and 151 lb-ft of torque. Mazda’s listed quell weight for a 2018 is 2,332 lbs. we figured that would be for a lightest Sport model, yet Car and Driver weighed a installed Club during 2,309 pounds.
Either way, it unequivocally is considerable how a new Miata weighs 200 pounds LESS than a prototype from 15 years ago … er, yore.
For a record, a stream 155-hp Miata Club went from 0 to 60 mph in 5.9 seconds. That Mazdaspeed Miata did it in 6.7 seconds. (Both numbers from C/D as they have them both published online, and presumably would’ve used allied methodologies, if not timing technologies)
AK: All right, it’s time for me to play a purpose of Miata fundamentalist channeling James May here: aren’t we disturbed this will hurt some of what creates a ND Miata so wonderful? It’s already an easier appurtenance to lift speed with, reduction of a movement automobile even than a round NC predecessor. we entirely commend I’m a small, surprising subset of Miata lover, yet we worry that it’ll remove some of a elemental charm. Although anything that would satisfy me to rev aloft and quarrel gears some-more would be acquire … and some-more revs and a aloft energy rise would do that.
JR: What we report is a Honda S2000, and we didn’t quite like that unequivocally much. It indispensable a 7th or 8th rigging on a highway. “I’m going 70 given are we at, like, 4,000 rpm!?!”
No, we do not consider it’s a problem. we have a lot of faith in Mazda’s engineers and a code itself. we don’t consider they’d plod adult their honour and joy. Especially given we can’t suspect there’s many selling vigour on a Miata during all. They aren’t removing calls to strike things adult given a new Pontiac Solstice has this many some-more horsepower, and a Toyota MR2 Spyder has this many more, and a Mercury Capri … we get a idea. They’re all dead.
AK: Good riddance. Except for a MR2. And but genuine competition, as we prove out, this strikes me as partial of a conflict devise all along. A energy strike keeps things uninformed a few years into a ND’s lifecycle. We have to be impending a prove during that everybody who wants a 155-hp Miata has one … maybe a 181-hp chronicle will get some folks off a fence. we suspect I’ll be carefully confident that it’ll be a some-more stirring car, even with a excess of power. But on a other hand, we don’t consider this genie goes behind in a bottle. By cranking adult a output, Mazda sets this expectancy that a specs matter some-more than a experience, and during any iteration it’ll demeanour peculiar if a numbers don’t climb.
Are we disturbed about that, during all?
JR: If it keeps going adult and adult and up, sure, afterwards they would remove a book on a Miata. Yet, story would prove that’s unlikely. The bottom Miata on that a Mazdaspeed Yore Edition was based, had 142 hp. The ND’s 155 hp was indeed DOWN from a NC.
Let me also contend that a Mazdaspeed Miata was an comprehensive scream to drive. As timing and fitness would have it, we got to expostulate one when we was only starting out as an intern, and we really enjoyed it some-more than my father’s NB. Using that as reference, we can contend we would happily take a some-more absolute Miata each time.
Of course, I’m sitting a building above a Z3 with 189 hp that weighed 580(!) pounds some-more than today’s Miata, so I’m positively not a Miata fundamentalist notwithstanding being around them given a unequivocally beginning.
AK: Likewise, even yet I’d get another 1.8-liter NA in a heartbeat. Perhaps a many fun I’ve ever had in a Miata was a LS-powered Flyin’ Miata NC named “Atomic Betty”, so who am we to judge? In any event, we’re all vehement to find out how some-more energy will change a impression of a 2019 Miata. Based on a justification we’ve seen, this energy strike seems to be happening, and it’ll be fascinating to see how it plays out both on a highway an in a justice of open opinion.