Heat crazed mad scientist

[Mike Rolica]

AHHHHHHHHHHHHHHHHHHHHHHHHHHHRRRRRRRRRRRGGGGGGGGGGG!!!!!
I just finished school!!  Flash backs!!

Sorry.....
Yes but if you remember...... they are minor losses... not enough length or
enogh of them to affect it....
Also.. you  do want turbulence and seperation as it will help in mixing in
the cylinder and a more complete burn!
Ever seen a set of 94 fs chev truck heads???? If so you'll know what I
mean... the have ramps... and make decent power..
Mike Rolica
Plant A,
Magnesium Products Division
Strathroy

(519)-245-4040  Ext. 265


		-----Original Message-----
		From:	John_Calabrese at ENGELHARD.COM
[SMTP:John_Calabrese at ENGELHARD.COM]
		Sent:	Monday, June 05, 2000 10:53 AM
		To:	gmecm at diy-efi.org
		Subject:	RE: Heat crazed mad scientist


		In order to quantify the flow increase, and thus the talk of
laminar vs
		turbulent flow, a velocity must be calculated from the area,
and cfm flow
		of the engine at different speeds.  Once the velocity and
reynolds number
		is calcuated, then you can see whether or not turbulent or
laminar flow is
		present.  Either way, in a stock TPI throttle body, there is
a abrupt edge
		where the airfoil goes.  Any time there is an abrupt change
in direction,
		flow separation will occur, and it will occur easier at
higher velocities.
		Flow separation can be avoided or lessened by smoothing out
the abrupt
		changes in the device you are flowing air in, be it a
manifold head port,
		or a throttle body.  The airfoils' job is to fill in a dead
spot between
		the two openings, thus making the change in direction less
abrupt.  This
		should increase the flow due to the smaller amount of flow
separation from
		the side of the walls.  NASCAR guys do this to the inside of
the intake,
		trying to fill in dead spots in flow that could cause flow
separation,
		vortices, and reversion, all which adversly effect flow
rates.  I do have
		to disagree with grumpy on the fusalage being the same as
the intake.
		Inner flow and outer flow can differ significantly when
boundaries and
		finite areas are considered, plus everything on a plane is
designed for
		lift and minimal drag....




		"Marteney, Steven J." <smarteney at xlvision.com>@diy-efi.org
on 06/05/2000
		09:31:58 AM

		Please respond to gmecm at diy-efi.org

		Sent by:  owner-gmecm at diy-efi.org


		To:   gmecm at diy-efi.org
		cc:
		Subject:  RE: Heat crazed mad scientist


		I don't have anything intelligent to add to this topic, but
I find it
		interesting that ALL (?) the aftermarket, high-flow,
twin-blade throttle
		bodies basically have the airfoil piece designed in the
housing.  Do they
		do
		it for looks or just for show?

		Steve

		-----Original Message-----
		From: Bruce Plecan [mailto:nacelp at bright.net]
		Sent: Saturday, June 03, 2000 4:37 PM
		To: gmecm at diy-efi.org
		Subject: Re: Heat crazed mad scientist



		Someone posted a link to a pic of one, after a quick
refresher on what they
		look like, I'll bet 2 shiny new pennies that it will
slightly worsen the
		air
		flow, especially at higher flow rates.   For a better look
at what happens,
		you might try to get a copy of Model Rocketry by G Harry
Stine.  Lots of
		**Good** data about sub sonic air flow.  Also an easy read,
and I think
		there was some talk about laminar flow boundry layer etc...
		   Also, for aero info., look at the WWII fighter stuff
that's all sub
		sonic
		(prop stuff, in level flight), and a good source.  Exterior
flow over a
		fuselage is just the same as what's in the intake tract.
		   If ya think I got crazy about air filtering, and misc
stuff ya ought see
		what rockets brought out in me
		Grumpy
	
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