RE: True definition of Knock

[Mike Rolica <mrolica@meridian-mag.com>]

He he he he h e hmmmmm cooooo
Mike Rolica
Plant A,
Magnesium Products Division
Strathroy

(519)-245-4040  Ext. 244



	-----Original Message-----
	From:	Carl Summers [SMTP:InTech@writeme.com]
	Sent:	Wednesday, July 12, 2000 5:25 AM
	To:	gmecm@diy-efi.org
	Subject:	RE: True definition of Knock

	wow......I guess I shouldn't drink and talk anymore..........just
wanted
	some of you to know I am Human tooo............cya




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	-----Original Message-----
	From: owner-gmecm@diy-efi.org [mailto:owner-gmecm@diy-efi.org]On
Behalf
	Of Carl Summers
	Sent: Wednesday, July 12, 2000 2:10 AM
	To: gmecm@diy-efi.org
	Subject: RE: True definition of Knock


	even better....thanks........I got in a fight tonight in the
bar........and
	it had nothing to do with it.............stillllllllllllll   I have
no
	bruises........but a bunch of people waiting for me,,I guess I
shouldn't try
	the college bar anymore........I guess I was bad.........alot of us
are on
	the edge....but alot of fun,,,,,they are so smart,absolute
	fstains...........it's nice to know others know.........Bruce lives
while
	others have alot of fun with people........shouldn't have did what I
	done...........How do you spell Honest?????I was proud to do
it..........No
	I didn't kill anyone.........someone wanted to do me, sad
day.......cause
	they have been tryin and still don't get it...............later




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	-----Original Message-----
	From: owner-gmecm@diy-efi.org [mailto:owner-gmecm@diy-efi.org]On
Behalf
	Of Len Sabatine
	Sent: Tuesday, July 11, 2000 8:45 PM
	To: gmecm@diy-efi.org
	Subject: RE: True definition of Knock


	  Carl,
	Amen to the chamber/dome/dish shapes . Low / mid lift port flow vs
cam C/L
	displacement
	Rod ratio and  to infinity vs the  Powertrain / Vehicle package and
Vehicle
	CD.
	A Dyno is a USEFUL TOOL, however many folks put all the eggs in that
basket
	, without on the
	RUN Backup Data. Dynos don't have slicks and steering wheel and
aren't
	accelerating the ACTUAL
	Vehicle MASS , trying to punch a hole thru the atmosphere to get to
the
	other end. Or if you prefer
	"Not up on Plane " as with a hull displacing water. We know how
detonation
	on BB / SC marine
	application can literally UBBRELLA Inconel exhaust valves, even at
low
	thresholds/ intensities.
	  We can simulate and postulate, nothing beats the real  world
running.
	With reference to KS,
	Auto Manufacturers are focused on Lowering NOX levels, saving Engine
	Components and trying
	to "GO THE DISTANCE". No joke, Detonation is  VERY Complex and
mostly in a
	state of FLUX.
	They overshoot the spark to keep the engine off the belly pan.
	Finally , I'd like to comment that we've seen differences between
Dyno
	pulls vs Track with respect
	to a specific engine's detonation sensitivity. Both environments and
	acquired data are of great value
	as detonation appears to be the quickest way to trim about 15% power
output
	off the top , wack the
	ring seal and knock the rod  B.E. out of round on a diagonal + More.
	[ Good numbers on that SC ENGINE ], and no hype, Cool.
	Len

	>Thank you Len,
	>        Finally someone with some real world experience explains it
a
	little
	>better......no offense to anyone(please).....there are so many
factors that
	>induce detonation and preignition.......fyi....the combustion
chamber shape
	>and dome/dish shape drastically affects detonation as does high
swirl vs
	rpm
	>and cyl filling height.....I have played with this extensively vs
	>compression ratio always trying to maintain as high a
(static)compression
	>ratio as possible......I can go on forever about differing
situations(cam
	>overlap,exhaust valve timing events, short turn entry angles vs
rpm, etc
	>........all I can tell you is I have proven 1180 hp on pump gas
with no
	>water injection.(yes, i have seen the claims of 1300+ on pump
gas...been
	>there done that and more...works great on a dyno...doesn't live in
the real
	>world)...intercooled/supercharged 8.3:1......but it took alot of
effort in
	a
	>marine environment where it sits at 5600 rpm for very long times
instead of
	>seconds as in a drag race or fun spurt......hth's
	>-Carl Summers
	>p.s. how about a 40' Hallett with twin 572's that went from
Huntington to
	>Catalina in 16 minutes....takes longer to fly.....was alot of fun
testing
	>though....hehehe
	>
	>
	
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