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Re: Heat crazed mad scientist
Helps to take measurements on dyno also, at WOT controlling the flow coming
out does wonders.
Also can experiment with tuned length float bowl and other inlets to
control pressure. Working in late
70's on 4cyl's almost got a request to build a oscillating flow bench, since
flow bench tuning was almost opposite
of dyno. When designing inlet and exhaust always think reversion control.
Alex
----- Original Message -----
From: Mike Rolica <mrolica@meridian-mag.com>
To: <gmecm@diy-efi.org>
Sent: Monday, June 05, 2000 12:21 PM
Subject: RE: Heat crazed mad scientist
> Where I used to work .. same thing.. he was the 2bl wizard.. also the 600
> holloy wizard...
> Tell ya it is nothing to do with surfaces.. more venturi and power
> valves....
> Can't say any more or I'll have to kill ya.
>
> Boils down to it has more todo with smoothing the air as it passes through
> carb.. cause you rely on that air for your mixture...
> Efi doesn't matter..... same reason you can get away with bigger cams on a
a
> efier.
> Mike Rolica
> Plant A,
> Magnesium Products Division
> Strathroy
>
> (519)-245-4040 Ext. 265
>
>
> -----Original Message-----
> From: Kelly Parker [SMTP:bigblockfw@hotmail.com]
> Sent: Monday, June 05, 2000 12:04 PM
> To: gmecm@diy-efi.org
> Subject: Re: Heat crazed mad scientist
>
> There is a machinist here(the best in town) that does
> something to carbs. He
> won't tell you what and during tech tear down it is
> invisible(it is illegal
> in roundy round racin')but it makes a big differance. Has
> something to do
> with smoothing the surfaces, thats all he will tell you.
> "if ya ain't cheatin', ya ain't tryin'"
>
> Point is these are all hi-revin' race cars and I don't think
> the same
> treatment would be that noticeable on a stock engine under
> street drivin'
> conditions.
>
> Btw the same guy builds remote control cars that run 60+
> miles per hour
> using weed eater engines. He wins every race without fail!
>
> Kelly
>
>
>
>
> >From: Gabe <gellett@earthlink.net>
> >Reply-To: gmecm@diy-efi.org
> >To: gmecm@diy-efi.org
> >Subject: Re: Heat crazed mad scientist
> >Date: Mon, 05 Jun 2000 10:32:54 -0500
> >
> >Turbulance near the injector sounds good, but near the
> throttle body
> >doesn't
> >sound that good to me...
> >
> >Mike Rolica wrote:
> >
> > > 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@ENGELHARD.COM
> > > [SMTP:John_Calabrese@ENGELHARD.COM]
> > > Sent: Monday, June 05, 2000 10:53 AM
> > > To: gmecm@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@xlvision.com>@diy-efi.org
> > > on 06/05/2000
> > > 09:31:58 AM
> > >
> > > Please respond to gmecm@diy-efi.org
> > >
> > > Sent by: owner-gmecm@diy-efi.org
> > >
> > > To: gmecm@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@bright.net]
> > > Sent: Saturday, June 03, 2000 4:37 PM
> > > To: gmecm@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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