and some details to boot!
they said: The race engines will use a stock 2.2-liter block with a two-stage turbo, just like the production version. Redline sits at a relatively lofty 5,200 rpm and the engine uses a very low 14:1 compression ratio
and some details to boot!
they said: The race engines will use a stock 2.2-liter block with a two-stage turbo, just like the production version. Redline sits at a relatively lofty 5,200 rpm and the engine uses a very low 14:1 compression ratio
I was really confused at first, 5200 rpm? Lofty? Then I realized it was a diesel.
Pretty little motor!
And to think we had a discussion on here a while back that was pretty much about how the Sky-activ wasn't anything special. I wasn't in that camp, and still claim Sky-activ is great.
MMM stick one in a sports racer body, iron out the gremlins, win Thunderhill 25hr...
Mehhhh. Diesel still feels wrong in a sports car. It doesn't have that peppy high winding feel that a sports car should have.
And then there's the issue of sky high diesel pricing and less availability.
Torque is over rated. Diesel torque isn't as much fun as a gas engine with enough torque and HP to get the job done.
Mazdax605 wrote: And to think we had a discussion on here a while back that was pretty much about how the Sky-activ wasn't anything special. I wasn't in that camp, and still claim Sky-activ is great.
Just because it's racing in a special class that appears to be trying to include diesels does not mean it's anything that speical. High compression, common rail, twin charged diesel.
What is Mazda doing that hasn't already been done by Audi?
I wish them luck, though.
Am I being too optimistic if I interpret this as part of a strong marketing and diesel-education campaign in advance of making them broadly available in their road cars?
I'm excited about the CX-5 diesel, even though it really, really kills me to consider anything SUVish when what I want is a diesel Mazda5 (or 3, if you could fit four 6-footers in one comfortably).
C'mon Mazda. Save me from gambling on a VW in 2015...
alfadriver wrote: What is Mazda doing that hasn't already been done by Audi? I wish them luck, though.
Aren't they using 15% less compression? (16.5-14?) and no particulate filter?
Maybe it is just the extra taxes here in the People's Republic of California but Diesel is nearly always within 5 cents of regular and always under premium.
I think diesel is a good move for Mazda. They might be able to steal some sales from VAG.
Mazdax605 wrote: And to think we had a discussion on here a while back that was pretty much about how the Sky-activ wasn't anything special. I wasn't in that camp, and still claim Sky-activ is great.
The discussion was that it was, for lack of a better term, a marketing gimmick , not that the technology isn't valid or good.
alfadriver wrote:Mazdax605 wrote: And to think we had a discussion on here a while back that was pretty much about how the Sky-activ wasn't anything special. I wasn't in that camp, and still claim Sky-activ is great.Just because it's racing in a special class that appears to be trying to include diesels does not mean it's anything that speical. High compression, common rail, twin charged diesel. What is Mazda doing that hasn't already been done by Audi? I wish them luck, though.
I think it is special because they are using such a LOW compression ratio in the diesel, and such a high compression ratio in the gas engines. What they have done with Sky-Activ is nothing short of amazing if you ask me.
Zomby Woof wrote:Mazdax605 wrote: And to think we had a discussion on here a while back that was pretty much about how the Sky-activ wasn't anything special. I wasn't in that camp, and still claim Sky-activ is great.The discussion was that it was, for lack of a better term, a marketing gimmick , not that the technology isn't valid or good.
Not how I remember the thread.
Mazdax605 wrote:alfadriver wrote:I think it is special because they are using such a LOW compression ratio in the diesel, and such a high compression ratio in the gas engines. What they have done with Sky-Activ is nothing short of amazing if you ask me.Mazdax605 wrote: And to think we had a discussion on here a while back that was pretty much about how the Sky-activ wasn't anything special. I wasn't in that camp, and still claim Sky-activ is great.Just because it's racing in a special class that appears to be trying to include diesels does not mean it's anything that speical. High compression, common rail, twin charged diesel. What is Mazda doing that hasn't already been done by Audi? I wish them luck, though.
Forgive me for being a doubter or whatever you interpret my opinion.... but how is ultral low compression diesel a good thing? Noting that combustion efficency is related to compression ratio, well....
As for their "high" compression gas engines, the ones they are producing are the same as everyone else doing similar enignes.
Sky-Activ = EcoBoost = VAG's DI = BMWs DI = etc. (and I fully admit that there's nothing that's notable to the lay enthusiest even in EcoBoost- it's basically the same ideas as BMW or Audi boosted DI engines)
They are all on the ragged edge of detonation compression, 2200-2500psi max injection pressure DI (both for central or side injection), turbo(s), Germans using Bosch, Japanese using Denso, us using all of the above....
We are all fighting the same battles.
alfadriver wrote: Forgive me for being a doubter or whatever you interpret my opinion.... but how is ultral low compression diesel a good thing? Noting that combustion efficency is related to compression ratio, well....
It sounds like it may be at least a fairly clever band-aid, with the caveat that the explanation I've gotten is from themselves...
It sounds like they're trading off some of that compression efficiency for help with emissions. It also sounds like they're suggesting that others are also unable to run at normal diesel compression ratios without some kind of band-aid, and that the normal one chosen is late delivery of fuel, so that the engine is essentially not getting to use the peak of the compression, having to wait until the charge has uncompressed significantly before firing.
But that's already way more of the Mazda line than I want to just regurgitate here.
What the marketing department calls it is irrelevant. It looks like it might be an interesting interim step in diesel development (which I think is true of pretty much all current diesels). I'm mostly excited about it as a diesel option without the BMW price tag or the VW quality roulette.
ransom wrote: What the marketing department calls it is irrelevant. It looks like it might be an interesting interim step in diesel development (which I think is true of pretty much all current diesels). I'm mostly excited about it as a diesel option without the BMW price tag or the VW quality roulette.
Honestly, if they do manage to give it a go here in the US, it would be very cool. Not many cars, granted, but cool. Honda bragged about a low emissions diesel for the US a few years ago, and that never went anywhere.
The upcoming challenges for cars is very tough, and since the US does not give any leeway for the kind of fuel that you burn, it's much, much more diffucult than the EU. So it would be very cool.
Thanks for that link. Interesting stuff.
alfadriver wrote:Mazdax605 wrote:Forgive me for being a doubter or whatever you interpret my opinion.... but how is ultral low compression diesel a good thing? Noting that combustion efficency is related to compression ratio, well.... As for their "high" compression gas engines, the ones they are producing are the same as everyone else doing similar enignes. Sky-Activ = EcoBoost = VAG's DI = BMWs DI = etc. (and I fully admit that there's nothing that's notable to the lay enthusiest even in EcoBoost- it's basically the same ideas as BMW or Audi boosted DI engines) They are all on the ragged edge of detonation compression, 2200-2500psi max injection pressure DI (both for central or side injection), turbo(s), Germans using Bosch, Japanese using Denso, us using all of the above.... We are all fighting the same battles.alfadriver wrote:I think it is special because they are using such a LOW compression ratio in the diesel, and such a high compression ratio in the gas engines. What they have done with Sky-Activ is nothing short of amazing if you ask me.Mazdax605 wrote: And to think we had a discussion on here a while back that was pretty much about how the Sky-activ wasn't anything special. I wasn't in that camp, and still claim Sky-activ is great.Just because it's racing in a special class that appears to be trying to include diesels does not mean it's anything that speical. High compression, common rail, twin charged diesel. What is Mazda doing that hasn't already been done by Audi? I wish them luck, though.
I don't remember interpreting your opinion. Actually I don't remember questioning anything you said. I was just surprised that a month or so ago the topic of Sky-Activ came up, and it was widely put down as not a big deal. I felt it was a big deal, and still do. I know you are in the industry, so I value your opinion, but to me Sky-Activ is excellent technology,and I applaud Mazda for sticking with it rather than go for another Hybrid.
In reply to Mazdax605:
I'm referenceing whether you think I'm some kind of crumudgeon or whatnot.... Which is fine.
The main reason I "put it down" is that everyone is doing it, Hyundai-Kia up to BMW- and everyone inbetween. It's not that it's not special, it's that it's not unique. I can assure you, DI is a tough technology to make right.
+20k PSI diesel is also very, very hard, and also a technolgy that virtually everyone is working on.
Oh, and SkyActiv isn't even Mazda's first time with all of the technology.... They just changed the name.
Mazdax605 wrote: Not how I remember the thread.
That's why I reminded you.
alfadriver wrote: In reply to Mazdax605: I'm referenceing whether you think I'm some kind of crumudgeon or whatnot.... Which is fine. The main reason I "put it down" is that everyone is doing it, Hyundai-Kia up to BMW- and everyone inbetween. It's not that it's not special, it's that it's not unique. I can assure you, DI is a tough technology to make right. +20k PSI diesel is also very, very hard, and also a technolgy that virtually everyone is working on. Oh, and SkyActiv isn't even Mazda's first time with all of the technology.... They just changed the name.
Did I call you a crumudgeon? Must be my alter ego. If i did I am sorry. I didn't even direct anything at any one person in this thread. I value what you have to say. I was just saying that in the other thread it was said that this technology is no big deal,and you say it here as well. I disagree that is all. No need to fight, we can disagree on things. I assume we are all adults here.
Guys, you're harshing the vibe of MY thread. Relax. 
alfadriver wrote: They just changed the name.
Oh hey, a TwinForce, er, an EcoBoost!
Did I call you a crumudgeon? Must be my alter ego. If i did I am sorry. I didn't even direct anything at any one person in this thread. I value what you have to say. I was just saying that in the other thread it was said that this technology is no big deal,and you say it here as well. I disagree that is all. No need to fight, we can disagree on things. I assume we are all adults here.
YOU seem to be escalating here, dont know if you realize that.
I give thumbs up to anyone pushing diesel in US market.
That's cool Vigo thanks for pointing it out. I didn't think I was doing anything wrong. I will leave now. I also love the idea of more new diesels in the US.
clutchsmoke wrote: I think diesel is a good move for Mazda. They might be able to steal some sales from VAG.
How many TDI sales are because it is the only "Cheap" diesel car on the market?
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