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post #1 of 19 (permalink) Old 03-17-2010, 10:01 AM Thread Starter
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New Mazda line up question

So looking over some of the 2011 models it looks like North America is getting the Mazda 2. If only that sucker had a 2.0l engine option it would be rocking. 2200lb odd curb weight with a 150hp engine would friggen rock. *sigh*.

I also noticed that the Mazda 5 is going to have a direct injected 2.0l engine with 150hp and Mazda's new I-start technology (IE engine turns off when you come to a stop and starts back up without using the starter when you hit the gas). A claimed 15% increase in milage between the two, pretty damned impressive (current Mazda 5 is 21/27 for the auto, that should push it to something like 24/30 or maybe even 25/30)

Now what I am curious about is what that means for the Mazda 6 and the Mazda 3.

It sounds like the Mazda 6/Atenza is getting the same 2.0l DISI engine that the 2011 Mazda 5 will have (also with I-start). Not sure if that'll make it in to the North American version as an option (it'd be nice). Also curious on the output. The 2.3l made 156hp in the Mazda 3 and I think also the Mazda 6, but it was rated at 153hp in the Mazda 5, so with 150hp in the 2.0 DISI engined Mazda 5, it makes me wonder if the Mazda 6, and I assume it'll find its way in to the Mazda 3 in 2011 or 2012, will make a bit more then 150hp.

I hope so. As porky as the Mazda 3 has become (about 250lbs heavier then when first introduced) an extra 2-5hp would be nice as well as more torque (the 2.0 DISI sounds like it'll probably be much torqueier then the old 2.0).

A 155hp and 142lb-ft 2.0 motor would give the base model some nice balls. Of course a 200lb diet would help as well.

Makes me wonder when and what we will see for a 2.5l DISI engine. 175hp, I-start and the same 15% fuel economy would be pretty damned nice.
-Matt
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post #2 of 19 (permalink) Old 03-17-2010, 11:24 AM
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Re: New Mazda line up question

I want I-start.



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post #3 of 19 (permalink) Old 03-17-2010, 11:32 AM
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Re: New Mazda line up question

how does it work without the starter?


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post #4 of 19 (permalink) Old 03-17-2010, 11:36 AM
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Re: New Mazda line up question

[quote author=TRex link=topic=168643.msg3572007#msg3572007 date=1268836333]
how does it work without the starter?
[/quote]

Little leprechauns.



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post #5 of 19 (permalink) Old 03-17-2010, 11:45 AM
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Re: New Mazda line up question

nope its not leprechauns...you're just saying that bc it St. Patricks Day. It's actually Adam's Beard that turns it back on just like it turns me on lol

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post #6 of 19 (permalink) Old 03-17-2010, 12:16 PM Thread Starter
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Re: New Mazda line up question

[quote author=TRex link=topic=168643.msg3572007#msg3572007 date=1268836333]
how does it work without the starter?
[/quote]

With the direct gas injection the ECU knows the position of all the pistons in the cylinder when the engine is turned off. Then when it is go time the ECU just injects fuel in to the cylinder that is just past TDC in compression and fires the spark plug. Bam, engine is back up and running again. Mazda is claiming it is seamless and probably is, otherwise I'd see a lot of people objecting to it.

One of the biggest wastes of gas in city driving is idling. Part of the reason hybrids get good milage in city driving (that plus the regenerative braking).
-Matt
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post #7 of 19 (permalink) Old 03-17-2010, 12:17 PM
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Re: New Mazda line up question

[quote author=shadoweighs1ton link=topic=168643.msg3572018#msg3572018 date=1268837126]
nope its not leprechauns...you're just saying that bc it St. Patricks Day. It's actually Adam's Beard that turns it back on just like it turns me on lol
[/quote]Omg I thought your post was serious until I read the second half :lmao:



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post #8 of 19 (permalink) Old 03-17-2010, 12:33 PM
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Re: New Mazda line up question

[quote author=azazel1024 link=topic=168643.msg3572075#msg3572075 date=1268838967]
[quote author=TRex link=topic=168643.msg3572007#msg3572007 date=1268836333]
how does it work without the starter?
[/quote]

With the direct gas injection the ECU knows the position of all the pistons in the cylinder when the engine is turned off. Then when it is go time the ECU just injects fuel in to the cylinder that is just past TDC in compression and fires the spark plug. Bam, engine is back up and running again. Mazda is claiming it is seamless and probably is, otherwise I'd see a lot of people objecting to it.

One of the biggest wastes of gas in city driving is idling. Part of the reason hybrids get good milage in city driving (that plus the regenerative braking).
-Matt
[/quote]

huh that is neato


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post #9 of 19 (permalink) Old 03-17-2010, 01:13 PM
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Re: New Mazda line up question

[quote author=azazel1024 link=topic=168643.msg3572075#msg3572075 date=1268838967]
[quote author=TRex link=topic=168643.msg3572007#msg3572007 date=1268836333]
how does it work without the starter?
[/quote]

With the direct gas injection the ECU knows the position of all the pistons in the cylinder when the engine is turned off. Then when it is go time the ECU just injects fuel in to the cylinder that is just past TDC in compression and fires the spark plug. Bam, engine is back up and running again. Mazda is claiming it is seamless and probably is, otherwise I'd see a lot of people objecting to it.

One of the biggest wastes of gas in city driving is idling. Part of the reason hybrids get good milage in city driving (that plus the regenerative braking).
-Matt
[/quote]

DO WANT.

Correct me if I'm wrong though, but doesn't constantly restarting the engine also waste fuel? I know when I have a bunch of stops around town the "Remaining fuel" counter goes down a mile or two every time I start the car back up


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post #10 of 19 (permalink) Old 03-17-2010, 01:29 PM
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Re: New Mazda line up question

Well this method of starting would clearly use less fuel than the traditional method. In addition, the engine will still be at operating temperature when you restart it. Clearly the fuel savings while the engine is stopped will outweigh any small extra amount required to get it going again.


...er, clearly.



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