I’d be salty if it was my car but wife doesn’t care. I require more power tho so unless Mazda does a speed 3 or something like it with AWD I’m getting a Mk 7.5 Golf R
Try the 2019 Mazda 3 with SkyActiv-X engine
Roughly the same power output of current 2.5 but from 2.0L engine. They haven't spoken about SkyActiv X 2.5L yet, only the 2.0LIsn’t that similar power to the Skyactiv G 2.5? I’m looking for 250-300 range for HP.
We want an awd ms3 hatch and we want it yesterday!
Thanks for detailed explanation. But I helevd you still need more energy to compress the air in a sealed environment of inactive cylinder similar to engine brake, hence youre wasteing more energy than gaining from decompressing the compressed air.The air acts like a spring, absorbing energy on the upstroke and releasing it on the downstroke, assuming the valves seal properly of course. The air heats up as it compresses, and cools as it expands. If the compressed air temperature at TDC is higher than the surrounding metal, some energy is lost due to thermal transfer of heat energy from the air to the cylinder head and piston. But since there is no combustion in these cylinders, and the block is kept hot anyway by circulating coolant, I don't think the temperature differential is that big, which means the thermodynamic loss won't be that much. I think the frictional losses from sliding unused pistons up and down will be greater.
Like you, I'm not a fan of cylinder deactivation. Piston rings aren't perfect seals, a small amount oil is always going to seep past the rings. Normally, it will be burned out during combustion. But if there's no combustion, it will accumulate. As you pointed out, Honda's VCM had problems with oil accumulation fouling the plugs and causing misfiring, leading to that lawsuit. It might also cause accumulation of carbon deposits. The increase in highway fuel economy Honda gained with cylinder deactivation was too small to be worth it IMO. But in today's regulatory environment, every MPG counts. Mazda must be hard up against their CAFE requirements if they're resorting to this.
Well the next 3 is supposed to be torison beam rear suspension. Wonder if this would impact on having AWD (uhm)We want an awd ms3 hatch (assuming rwd is off the table) and we want it yesterday!
Torison beam rear suspension like Mazda2? Cost cutting used at wrong place by Mazda! (notcool)Well the next 3 is supposed to be torison beam rear suspension. Wonder if this would impact on having AWD (uhm)
Yup if this doesn’t happen like I said it’s Golf R or maybe a 3 series with xdrive.
Torison beam rear suspension like Mazda2? Cost cutting used at wrong place by Mazda! (notcool)
Thanks for detailed explanation. But I helevd you still need more energy to compress the air in a sealed environment of inactive cylinder similar to engine brake, hence you’re wasteing more energy than gaining from decompressing the compressed air.
In any event the true efficiency gain from cylinder deactivation is minimum as you said, and the fact is every other car manufacture who had tried has given up but Honda. Honda VCM V6 has faced problems with class-action lawsuit. This makes me believe the system has more ill effect than efficiency gain.
Hi guys,
Have a read of this article:
Mazda6 Update To Debut At LA Auto Show
In particular:
So... 2.5T is coming to CX-5 now as well (scratch)
If it is to be believed, very interesting and enticing
Yeah I saw that as well and posted aboveMazda's press release on the upcoming LA auto-show clearly states "updated Mazda CX-5, which adopts the same SKYACTIV-G 2.5 with cylinder deactivation as the new Mazda6, will both make their North American debut at the L.A. Auto Show". The CX-5 will eventually get the diesel engine and as such, I doubt it will get the 2.5 turbo.
https://insidemazda.mazdausa.com/press-release/mazda6-to-debut-at-la-auto-show/