Chrysler to boost MPG
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RE: Chrysler to boost MPG - 6/21/2007 3:11:51 PM
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shiltz
Posts: 549
Joined: 3/17/2004
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It's about time, they have been going the wrong direction on some cars, especialy where it really matters, the compact car, that stupid "world engine" is a pos when it comes to fuel economy, 10 years ago dodges compact the, the neon, got 22/31 (2.0 3sp auto) and 25/35 (2.0 5sp manual), fastforward 10 years and the current dodge compact car, the Caliber ranges from 20/24 (2.4 w/ CVT) to 24/29 (1.8 5sp manual), all the numbers are based off the new EPA rating system, how they can make a small compact car with a little 2.4 4cyl with a CVT only get 1MPG highway better than a full size station wagon with a 5.7 hemi with a 5sp auto is beond me.
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RE: Chrysler to boost MPG - 6/22/2007 7:25:36 AM
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HankL
Posts: 2719
Joined: 8/20/2005
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The Detroit News has a similar article:
http://www.detnews.com/apps/pbcs.dll/article?AID=/20070622/AUTO01/706220359/1148
While I understand why they would choose the 2.4L 'World Engine' to do the direct injection development
(because they can share costs with Mitsu and Kia who are partners)
I strongly feel that it would make more money for Chrysler to convert the 5.7 and 4.7 V8s to direct injection so that truck customers would get both higher MPG and higher Horsepower.
A few weeks ago The Wall Street Journal reported that Chrysler still makes over $11,000 profit on trucks (even with rebates of $6,000) but only about $2000 on the small cars like Nitro/Caliber/Liberty. Getting truck buyers to purchase will turn Chrysler's $ losses around much faster than the smaller cars.
I assume the 'new axle technology' means a complete reworking of the CAD system....which was a gas waster from the begining and has had its share of annoying flaws especially in cold weather
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RE: Chrysler to boost MPG - 6/22/2007 6:16:05 PM
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Kingelvis
Posts: 94
Joined: 6/8/2004
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DI is supposed to be better at boosting HP than boosting economy, so maybe the thing creating like a 292cid or 318cid HEMI would match the HP of the current 345, but get better mileage from smaller displacement.
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RE: Chrysler to boost MPG - 6/22/2007 8:45:30 PM
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horatio102
Posts: 2233
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292 or 318? Are you just pulling these numbers from space?
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RE: Chrysler to boost MPG - 6/23/2007 7:52:49 AM
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HankL
Posts: 2719
Joined: 8/20/2005
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Taking the 2.4L four cylinder 'World Engine'
and turning it into a 4.8L V8
should be straight forward.
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RE: Chrysler to boost MPG - 6/26/2007 8:30:45 AM
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HankL
Posts: 2719
Joined: 8/20/2005
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a weblink to the full press release
that the articles are written from:
http://www.theautochannel.com/news/2007/06/21/052675.html
the little tidbit that the new dual sparkplug 4.7
will be 5% more fuel efficient than the old 4.7
is of interest and seems to confirm
the 'rule of thumb'
that with 'normal' research & development effort
it is hard to improve an engine's fuel efficiency
more than 1% per year of research.
Honda and BMW have testified under oath to the same thing.
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RE: Chrysler to boost MPG - 1/8/2008 7:56:15 PM
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moe7404
Posts: 355
Joined: 7/7/2007
Status: offline
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moe in wichita ks
you bought the lie about leaded gas in the 70s. so why shouldnt you buy the mpg crap now.
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RE: Chrysler to boost MPG - 1/9/2008 3:09:03 AM
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HankL
Posts: 2719
Joined: 8/20/2005
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Looking back at this older thread
it is worth pondering now
if new Chrysler bigwigs Nardelli (ex-GE locomotives) and Press (ex-Toyota)
will press this issue harder
of improving MPG of Chrysler engines quickly by small changes
(gear ratios, higher compression ratios with more ignition retard, aero tweaks)
than Tom LaSorda (ex-GM factory designer) apparently did
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RE: Chrysler to boost MPG - 1/9/2008 4:53:30 PM
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grungerockjeeper
Posts: 188
Joined: 10/3/2006
From: Portland, OR
Status: offline
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quote:
ORIGINAL: shiltz
It's about time, they have been going the wrong direction on some cars, especialy where it really matters, the compact car, that stupid "world engine" is a pos when it comes to fuel economy, 10 years ago dodges compact the, the neon, got 22/31 (2.0 3sp auto) and 25/35 (2.0 5sp manual), fastforward 10 years and the current dodge compact car, the Caliber ranges from 20/24 (2.4 w/ CVT) to 24/29 (1.8 5sp manual), all the numbers are based off the new EPA rating system, how they can make a small compact car with a little 2.4 4cyl with a CVT only get 1MPG highway better than a full size station wagon with a 5.7 hemi with a 5sp auto is beond me.
I can explain this away real easy. Government mandates on safety and emissions. Theyve mandated more things like airbags, side impact, etc. All this adds wieght. As you choke something down with tougher emissions standards you lose more horsepower and your efficiency goes right out the window. A hemi v-8 can easily haul around a few hundred extra pounds, but a 4 cyl is likely struggling even without the added doodads.
Why else do you guys think those honda CRX's they had in the early 90s were rated at over 50 mpg with a 4 cyl and no dopey hybrid electric garbage complicating things? Simpler=better every time. But try telling that to a government beauraucrat whose cousin or brother in law owns the company making the emissions equipment.
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