Who needs diesel? SkyActiv-X HCCI sounds awesome

Started by Laconian, August 08, 2017, 03:30:27 PM

93JC

#30
Quote from: MX793 on August 08, 2017, 08:29:52 PM
And that's not accounting for differences in how the throttle pedals are calibrated.  It's easy to make a car "feel" quicker simply by calibrating the pedal more aggressively (e.g., open the throttle by 40 or 50% when the pedal is only depressed 1/4 of its stroke).

Something I complained about in my test drive of a MkV GTI (2009)...

My buddy's Golf Wagon (2015 or '16) isn't bad for it though, but his 1.8 TSI doesn't feel any more spritely than my 2.5 L (non-SkyActiv) Mazda 3. Which makes sense, because mine's 167 hp and his has a scant 3 hp advantage over it.

MrH

Just imagine a 2.0 liter, making something like 170 hp, 200 lb/ft of torque, in an ND Miata, getting 55 mpg on the highway :wub:
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Xer0

That engine would rev to like 5K RPM and ruin half the fun of a Miata.

12,000 RPM

Yea it needs to zing

Mazda needs to take more advantage of that 14:1 or whatever compression ratio.... let that motherfucker wind out like a rotary.
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AutobahnSHO

Quote from: Xer0 on August 10, 2017, 12:06:35 PM
That engine would rev to like 5K RPM and ruin half the fun of a Miata.

?? You saying high revs are bad?
Will

giant_mtb

Quote from: AutobahnSHO on August 11, 2017, 08:14:29 AM
?? You saying high revs are bad?

No, he's saying that such a compression ignition engine would only be able to make it to about 5k revs (think diesel), which takes half the fun (rev range) out of a normal Miata. :lol:

AutobahnSHO

Quote from: giant_mtb on August 11, 2017, 08:16:07 AM
No, he's saying that such a compression ignition engine would only be able to make it to about 5k revs (think diesel), which takes half the fun (rev range) out of a normal Miata. :lol:

Gotcha!  That would indeed suck. Nothing like revving my SHO up to 7k back when I had it. :mrcool:
Will

Soup DeVille

Quote from: giant_mtb on August 11, 2017, 08:16:07 AM
No, he's saying that such a compression ignition engine would only be able to make it to about 5k revs (think diesel), which takes half the fun (rev range) out of a normal Miata. :lol:

That may be a false assumption.
Maybe we need to start off small. I mean, they don't let you fuck the glumpers at Glumpees without a level 4 FuckPass, do they?

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12,000 RPM

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FoMoJo

I don't think I really want any more energy transferred to my pelvis :frown:.
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Laconian

Kia EV6 GT-Line / MX-5 RF 6MT

68_427

Quote from: MrH on August 10, 2017, 11:47:24 AM
Just imagine a 2.0 liter, making something like 170 hp, 200 lb/ft of torque, in an ND Miata, getting 55 mpg on the highway :wub:

Rumors are 187hp and 170 lb/ft
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r0tor

All this tech + a supercharger... and only 187hp?  - yawn-
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12,000 RPM

It does seem to be a bit much for those numbers. VW 1.8T is not far off in fuel economy while making a buttload more torque and power.
Protecctor of the Atmospheric Engine #TheyLiedToUs

Laconian

Nah. The Mazda engine looks like it'll be making in the city what VW does on the highway (38-39mpg). And it'll do on the highway what VW does... IN ITS DREAMS! (SICK BURN)
Kia EV6 GT-Line / MX-5 RF 6MT

MX793

Quote from: r0tor on September 08, 2017, 05:34:59 AM
All this tech + a supercharger... and only 187hp?  - yawn-

Probably only revs to 4000 RPM.
Needs more Jiggawatts

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Laconian

No Y-axis, but it looks like its redline is just short of the Skyactive-G's...

Kia EV6 GT-Line / MX-5 RF 6MT

MX793

Hmm, based on the curve shapes, I'm guessing the blower is there to help with low RPM and isn't providing much compression at higher RPM.
Needs more Jiggawatts

2016 Ford Mustang GTPP / 2011 Toyota Rav4 Base AWD / 2014 Kawasaki Ninja 1000 ABS
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MrH

The blower isn't really a supercharger in a conventional sense.  It's to prevent throttle loss, that's about it.
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2019 Acura RDX SH-AWD
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Previous: '02 Mazda Protege5, '08 Mazda Miata, '05 Toyota Tacoma, '09 Honda Element, '13 Subaru BRZ, '14 Hyundai Genesis R-Spec 5.0, '15 Toyota 4Runner SR5, '18 Honda Accord EX-L 2.0t, '01 Honda S2000, '20 Subaru Outback XT, '23 Chevy Bolt EUV

MX793

Quote from: MrH on September 08, 2017, 07:58:54 AM
The blower isn't really a supercharger in a conventional sense.  It's to prevent throttle loss, that's about it.

Odd that they'd bother with the liquid to air intercooler, then.  Just pumping air doesn't introduce the same amount of heat as actually compressing it.
Needs more Jiggawatts

2016 Ford Mustang GTPP / 2011 Toyota Rav4 Base AWD / 2014 Kawasaki Ninja 1000 ABS
1992 Nissan 240SX Fastback / 2004 Mazda Mazda3s / 2011 Ford Mustang V6 Premium / 2007 Suzuki GSF1250SA Bandit / 2006 VW Jetta 2.5

MrH

Yeah, I was thinking the same thing.  Maybe it's to provide a more consistent intake temperature?  The controls on this thing have to be wild.  I imagine they're trying to reduce the variables as much as possible.
2023 Ford Lightning Lariat ER
2019 Acura RDX SH-AWD
2023 BRZ Limited

Previous: '02 Mazda Protege5, '08 Mazda Miata, '05 Toyota Tacoma, '09 Honda Element, '13 Subaru BRZ, '14 Hyundai Genesis R-Spec 5.0, '15 Toyota 4Runner SR5, '18 Honda Accord EX-L 2.0t, '01 Honda S2000, '20 Subaru Outback XT, '23 Chevy Bolt EUV

12,000 RPM

Protecctor of the Atmospheric Engine #TheyLiedToUs

Galaxy

The blowers primary reason is to help regulate the pressure in the engine, which would also explain why the temperature needs to be controlled.