Understood. But my recollection was that the reason it wouldn't run lean
was that the turbo/supercharger changed the amount of pressure because it
was forcing the extra air in, over the same volume of air at a normal level
of pressure. Kinda like how water boils at a lower temp at high altitudes
because of the less dense air, more energy is released from the fuel due to
higher pressure.
On Wed, May 5, 2010 at 4:52 PM, <WeslakeMonza1330@aol.com> wrote:
> With a carb the amount of fuel dumped in is determined by the jets or
> needles so that even given carb at any given engine speed (air flow) can be
> made to run rich. Same thing with fuel injection if it's not set correctly,
> injectors too big etc.
>
> A lot of factors limit how much AIR can be drawn into the engine
> (volumetric efficiency??) and given you can always add more fuel to the air
> than it needs (air/fuel mixture is too rich) it is the overall breathing
> efficiency of the engine that limits power. The engine sucks in as much air
> as it is capable of whether carb or injection.
>
> What a turbo or super charger does is FORCE FEED AIR INTO THE ENGINE. The
> engine doesn't suck air rather it has air pumped into it, sometimes at
> pressure (tech difference between various types of supercharger and turbo
> charging).
>
> More air = more fuel though it's still possible to get a super or turbo
> charged engine to run too rich. It's also possible to have to little fuel
> with just a carb (or injection) and super or turbo charging.
>
> If the turbo or supercharger just put more air into the engine for any
> given amount of fuel the engine would simply run lean and make no more power
> than without a super or turbo charger.
>
> Weslake-Monza 1330
>
> In a message dated 05/05/2010 22:22:24 GMT Daylight Time,
> eric.t.cartman@gmail.com writes:
>
> With a carb, the amount of fuel dumped in is determined by the speed of the
> air flow. So as more CFM is fed in to the venturis, more gas is pulled in
> to the cylinder. With a turbo or supercharger, it uses the same amount of
> fuel as non-boost system, it just crams a lot more air in so that you get
> more energy out of the fuel at combustion time.
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