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Turbo Fundamentals -
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- By: Dennis Grant
dg50@chrysler.com
- June 1997
- Subject: Turbo
Fundamentals -
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- How Turbos Work
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- (or: The Closest
Thing to a Free Lunch)
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Enter the turbocharger, a turbine fed by exhaust
gasses, connected to a compressor via a shaft that compresses intake air into
the engine. More air in the cylinder means more fuel can be burnt per power
stroke, more burnt fuel means more hot gas, more hot gas means more power - and
more boost too.
This is the closest thing to a free lunch you'll
find in engineering, because you're taking heat (energy) that would otherwise be
wasted and getting usable work out of it, with almost no tradeoffs. You gain a
little complexity, and added manufacturing costs, but there is no real
performance hit from adding a turbo. There are many ways to save money while
doing modifications and power ups, and that is what the this info is all about.
I would be one of the most cost conscious rev heads around but some (most) times
you have to spend money (wisely) to make power. Obviously the more you can do
yourself, the cheaper any modification becomes. If you know exactly what needs
to be done, paying someone else to do just that also saves money. It's when you
are unsure of what is required to be done to achieve your goals that leaves you
open to exploitation.
I am constantly amazed at photo's in magazines
showing great cars that have the exposed fancy foam filter under the hood that
obviously sucks all that hot air from the radiator (and intercooler dependent on
turbo or not). These cars are not getting any benefit from the foam filter if
they are sucking air 50 degrees or more over ambient or outside air temperature.
From tests conducted with temperature sensors in various locations it
shows that this can definitely increase the temperature of the boost air
entering the cylinders by a significant amount.
Possibly even enough to cause detonation under some circumstances.
NEXT:- Turbo
Fundamentals Pg 1.
BEFORE
ANY TURBOMODS
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CONTENTS |
- Click Image to go to information
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- To
MODIFY or NOT
DETONATION
Pre-ignition & Fuel
Fuel Volume & Pressure
Air Supply
Exhaust & Heat
- Lubrication
- Cooling &
Water
- Breathing
- Boost
- Modification
Sequence
- Conclusions
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CONTENTS |
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AIR FILTERS
DUCT COLD AIR
SPARK PLUGS
INCREASE BOOST
FUEL ENRICHMENT
INTER COOLING |
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The Ideal Gas Law.
In short, gas temperature, pressure, and
volume are all related. Compress a gas (reduce the volume) and pressure and
temperature goes up. Let it expand, and temperature and pressure go down.
Increase the temperature, and the pressure goes up (in an enclosed space) or
the volume goes up (it expands).
Read
more
AIR FILTER
Replace AIR FILTER with Alternate type.
As mentioned, the foam type air filter seems to have been proven in racing
and extreme power conditions by allowing much better air flow while
still doing its job of removing dust, dirt and grime from harming your
sensitive high speed turbo and engine internals.
Read
more
From
discussions with many Turbo owners, I have found that some
want to retain the factory performance, while others want to
make major modifications for the full power potential of
their Turbo Vehicle.
( typed car but changed it, because you may have a Van or
4WD as some of our RTO's do.)
Read more
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