Fuel injection=Normally aspirated?

Bob Cunningham,103 VanNote,2682002,6173346269

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Aug 29, 1990, 4:39:51 PM8/29/90

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I always thought that the phrase "normally aspirated" meant a carb
and atmospheric pressure (no fuel injection, turbo, or supercharger).
Am I wrong? or can fuel injected be considered normally aspirated?

-Bob

Brent Besler

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Aug 29, 1990, 8:21:26 PM8/29/90

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I though that an engine which was fuel-injected, but with no turbocharger or
supercharger was "normally aspirated".

John Kerenyi

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Aug 30, 1990, 1:11:02 PM8/30/90

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Yes, a fuel-injected engine can be normally aspirated. To aspirate means,
roughly, to supply with air. Turbochargers and superchargers ram extra
air into the compression chamber to provide more power. Fuel injection
merely provides a more consistent, controlled supply of fuel (NOT air)
to the chamber, since it is inserted in precise amounts, often via a
computer. The air, of course, has to get in somehow, since there is no
carburetor to mix the fuel with the air. Correct me if I'm wrong, but
in fuel-injected cars, there is a regular air intake somewhere that directs
air into the compression chamber as needed. If this air intake has NO
turbocharger or supercharger hooked up to it, the car is normally
aspirated, because the air enters the chamber under its own power.

jk

John Kerenyi

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Aug 30, 1990, 1:22:24 PM8/30/90

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In article <27...@nosc.NOSC.MIL> koz...@halibut.nosc.mil.UUCP (Walter A. Koziarz) writes:
>
> [living organism analogy omitted]
>

Walt, that explanation was even better than mine! I congratulate you on
your clarity. I'm not being sarcastic, either; I mean it!

John

Geoff Miller

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Aug 30, 1990, 2:08:40 PM8/30/90

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In article <1990Aug29.2...@sun.soe.clarkson.edu> cunn...@clutx.clarkson.edu writes:

"Normally aspirated" means "unsupercharged." The term says nothing about
the mechanism of fuel delivery.

Geoff

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Scott Fisher

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Aug 30, 1990, 3:42:55 PM8/30/90

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In article <1990Aug29.2...@sun.soe.clarkson.edu>,
cunn...@clutx.clarkson.edu (Bob Cunningham,103

Then Brent Besler says he thought fuel injection meant normally
aspirated.

The truth is simple:

Normally aspirated means that it has no forced induction of
any kind (turbine-driven, belt-driven, etc.) It has to do
with the air delivery. Fuel delivery has nothing to do with
it. One of the alternative definitions of "aspiration" is
"breathing." So yes, my MGB with two SU HS4 carbs is naturally
aspirated, and so is my GTI with Bosch foo-Jetronic injection,
and so is Archer's Alfetta with Spica mechanical injection.
My dad's Thunderbird Super Coupe is not naturally aspirated,
nor was the SVO Mustang I used to drive.

Walter A. Koziarz

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Aug 30, 1990, 7:58:51 AM8/30/90

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In article <1990Aug29.2...@sun.soe.clarkson.edu> cunn...@clutx.clarkson.edu writes:

Sure can! Generally, one can think of a living organism analogy, the engines
'breathes' air and is 'fed' gasoline. Without a supercharger (yes,
supercharger *IS* a generic term which includes turbochargers) the 'breathing'
is normal; hence, normally aspirated. Method of 'feeding' is irrelevent to
'breathing'/aspiration. Not the most technical explanation, but you get the
idea, right?

Walt K.

Brent Besler

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Aug 30, 1990, 5:53:30 PM8/30/90

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No I said or meant to that "normally aspirated" EFI engines exist.