Should the Next MazdaSpeed3 be Naturally Aspirated?

[2k4_8]

Originally Posted by BigRedSpecial You definitely won't see a supercharged mazda.

Why not? The millennia was miller cycle, but it was supercharged. Not that that is what I would want...but nothing is beyond the realm of possibilities.

[BigRedSpecial]

Miller cycle has to be supercharged (it's a large part of what the Miller cycle is... essentially a supercharged Atkinson cycle), done for efficiency reasons.

Not saying it's impossible of course, but I HIGHLY doubt you'll ever see a supercharged, performance Otto cycle from mazda. Too much turbo love there.

[Danfish98]

Given that all the Skyactiv engines are Atkinson cycle, I wouldn't be shocked if the next Speed is a Miller cycle engine. Would make a lot more sense than a NA Speed.

[Cheapspeed]

Originally Posted by Danfish98 Given that all the Skyactiv engines are Atkinson cycle, I wouldn't be shocked if the next Speed is a Miller cycle engine. Would make a lot more sense than a NA Speed.

So a supercharged Speed?

[BigRedSpecial]

Originally Posted by Danfish98 Given that all the Skyactiv engines are Atkinson cycle, I wouldn't be shocked if the next Speed is a Miller cycle engine. Would make a lot more sense than a NA Speed.

Where did you hear this? The only Atkinson cycle engines I know of are all in hybrids, because they have fuck all low end power, hence the Miller cycle.

EDIT: Doing some googling now and a lot of sites are saying it operates similarly to an Atkinson cycle at certain loads/rpms, but can't really find much technical to back it up

[himurax13]

Originally Posted by Cheapspeed So a supercharged Speed?

A supercharged hybrid Mazdaspeed 3 with 350 HP/400 TQ, and gets 40 MPG.

[Ziggo]

Its all just trickeration with the valve timing. If you close the intake valve late, some air in the chamber reverts back into the intake manifold and your motor is technically running an atkinson cycle. Allows you to keep the throttle plate more open so there is less pumping loss as well. Thus the very high static compression ratios on the skyactives, but when you look at the dynamic ratio its actually substiantally less. The bonus is if you want more power you can close the valave on time and increase torque.

Zigatapatalka

[Format]

I don't think a Speed3 should be NA. Although I am a huge fan of NA cars, you have the mazda 3 for the NA aspect of things. The speed 3 is a turbo car and should remain that way. With that being said, if it were to go a NA route, I think I should be much further down the road. If it were to go the NA route, I would love to see a hybrid AWD version that utilizes new technology to make the same power that forced induction would make. Unfortunately, that is a lot further down the road and with our current understanding thats released to the public you don't see hybrids making that kind of power. Overall, with our current technologies, I think the Speed3 should remain turbo and maybe in the future once we have spiffy science shit can it go NA

[kpuser1]

Originally Posted by himurax13 A supercharged hybrid Mazdaspeed 3 with 350 HP/400 TQ, and gets 40 MPG.

And with AWD and under 30k..

And to answer the question. No and Hell No..

[himurax13]

Originally Posted by kpuser1 And with AWD and under 30k.. And to answer the question. No and Hell No..

AWD for under 30K?

Hell no.

I don't know what you people's obsession is about AWD.

It is too expensive up front and costly to repair.

[kpuser1]

Originally Posted by himurax13 AWD for under 30K? Hell no. I don't know what you people's obsession is about AWD. It is too expensive up front and costly to repair.

I was joking like I thought you were.

[Danfish98]

Originally Posted by BigRedSpecial Where did you hear this? The only Atkinson cycle engines I know of are all in hybrids, because they have fuck all low end power, hence the Miller cycle. EDIT: Doing some googling now and a lot of sites are saying it operates similarly to an Atkinson cycle at certain loads/rpms, but can't really find much technical to back it up

Here's the best article I could find on the Skyactiv engines. How Mazda's Skyactiv Fuel-Efficiency Technology Works | Vehicles & Technology content from WardsAuto

Interesting that the Mazda engineer they talked to claimed it was a Miller cycle engine. They have to be doing something weird with it to only get 155 hp out of a direct injected 2 liter with a 12:1 compression ratio.

[Juyoung]

Originally Posted by Danfish98 Here's the best article I could find on the Skyactiv engines. How Mazda's Skyactiv Fuel-Efficiency Technology Works | Vehicles & Technology content from WardsAuto Interesting that the Mazda engineer they talked to claimed it was a Miller cycle engine. They have to be doing something weird with it to only get 155 hp out of a direct injected 2 liter with a 12:1 compression ratio.

They said that with the new exhaust manifold on the new 14 mazda 3 that engine is still rated at 155hp, but torque peaks way lower than you'd think a naturally aspired 2L would (150 lb-ft at 3000 rpms)

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[mituc]

2014 Mazda Axela / Mazda3 Hybrid revealed

SkyWhatever 2.5N/A 300cp 8500rpm redline (SkyRevving?) for the front wheels and electric 80cp for the rear, please. Thank you!