Horse Power and its Effectiveness

[Mike Rolica]

Diesel engines make more torque period.  There are more btu's in a gallon of
diesel than a gallon of gas.  Therefore any one can see that more heat\=
more expansion of gasses = more force.  Energy cannot be created or
destroyed.. only altered.  Soe if there is more energy in a litre of diesel,
then there is more energy converted to mech and heat energy.  Diesels also
run a lot higher compression so right off the bat they will have more
torque.  My vw diesel(tubo produced 220ft-lbs at 2200rpm.... 105hp at 5200
<mailto:105hp at 5200> . A1.9 L.  the 2.0 g60 motor that runs about same boost,
produces no where near that amount
Mike Rolica
Meridian Magnesium Products
Strathroy, Ont 
Ext. 260


	-----Original Message-----
	From:	David Cooley [SMTP:n5xmt at bellsouth.net]
	Sent:	Monday, December 13, 1999 9:55 PM
	To:	gmecm at efi332.eng.ohio-state.edu
	Subject:	Re: Horse Power and its Effectiveness

	At 09:16 PM 12/13/1999 -0500, you wrote:
	>A few comments:
	>
	>For a given displacement, long stroke means small bore means less
force.
	>This exactly balances out the longer moment arm.  Long stroke
motors have a
	>harder time at high revs (due to both inertia and limited
breathing) but
	>they offer no advantage in low speed torque.
	>
	>Diesel engines make less torque than gas engines (naturally
aspirated).
	>Their advantage is the BMEP is not limited by detonation so they
can take
	>gobs of boost.

	Since when do they make less torque?
	The cummins 5.4L I6 makes 650 lb/ft in full trim at 1800 RPM.  Tuned
down 
	for Dodge, It makes 400 Lb/ft at 1800 RPM...  Would love to see a
gas I6 
	5.4L engine do that!
	===========================================================
	David Cooley N5XMT Internet: N5XMT at bellsouth.net
	Packet: N5XMT at KQ4LO.#INT.NC.USA.NA T.A.P.R. Member #7068
	We are Borg... Prepare to be assimilated!
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