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New Volt should get 230 mpg in city, GM says - Page 10

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Posted by News on August 14, 2009, 11:38 am

Sleeve valved 2-strokes are highly efficient and the most powerful engine
ever made in power/weight ratio was the RR Grecy in WW2 to replace the
Merlin.  It was dropped as money was directed to jets.

Posted by harry on August 13, 2009, 6:13 pm

If you buy a Subaru, the timing is geared. No belts or chains.  Now
that is a wonderfully smooth engine. (Boxer)

Posted by clare on August 14, 2009, 1:57 am
 On Thu, 13 Aug 2009 11:13:45 -0700 (PDT), harry

 If you are talking the EA series you are correct. Howvever all the
overhead cam engines (I believe ALL currently produced or reasonably
recent Sbes fall into this category) are belt driven. Might be an odd
chain driven one but I've not seen it.

The EA series has been gone since something like 1989 (the 1800 GL or
"Cjhaser" EA81)
Even the EA82 was belt driven (starting something like 1985)

Posted by Neo on August 13, 2009, 8:26 am

I read that the Chevy Volt Lithium Ion battery Pack  cost
from $0,000 to $5,000 USD. The Chevy Volt Lithium Ion Battery
Pack T-configuration suggest that that it is made of smaller modular
units connected in series or parallel - so  it might be viable to
replace only the modules that go *bad* instead of replacing
the entire battery system all at once.   In order to extend the life
of the battery, the car's onboard computer needs to prevent the
battery charge level from dropping too low before recharging.
Reportedly in order to extend the lifespan of the batteries to
15 years or 150,000 miles (which allow for Toyota safely
guarantee the batteries for 8 years or 100,000 miles), the
engineers set  the car's onboard computer's minumum charge
level for the 2008 Toyota Prius NiMH battery is 60 percent.
What I've been reading ( and please correct me if I am wrong)
is that a replacement Toyota Prius NiMh (static) Battery
Pack now cost about $000 USD.

Posted by Bob F on August 11, 2009, 11:44 pm
 Frank wrote:

They will be charged at night, when surplus power is available.

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