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ESS 540i supecharged
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The design of a turbocharger is very simular to that of the supercharger.
The difference being one is exhaust-driven(turbo) and the other
belt-driven(supercharger). The general rule is that a turbocharger
maximizes your powerband at a higher rmp, because it is powered
by the amount of exhaust being forced through it. On the otherhand,
a supercharger has better lowend torque, since it is controlled
by a belt directly connected to the crankshaft. A supercharger is
already injecting air into the system, even at extremely low rpm.
Generally, superchargers cost a little more than turbo kits, but
a turbo kit is tougher to install, as you must typically route your
exhaust system through the turbocharger as well as add an intercooler.
There are tradeoffs between both systems. In theory a turbocharger
is more efficient because it is using the "wasted" energy in the
exhaust stream for its power source. On the other hand, a turbocharger
causes some amount of back pressure in the exhaust system and it
also tends to provide less boost until the engine is running at
higher RPMs. Superchargers are easier to install but tend to be
more expensive.
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Supercharger:
A supercharger is much like a turbocharger, with the biggest differnce
being that a supercharger is connected directly to the crankshaft
with a belt. A supercharger is matched to an engine by its displacement
and belt ratio. It can provide excess airflow at any engine speed.
The concentrated charge of air provided by a supercharger results
in a more powerful combustion stroke in the engine's cylinders, resulting
in improved engine performance. A supercharger is a self-contained
unit, while the turbocharger relies on the engine's exhaust system-
and, often, an intercooling system to function. |
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European Supercharging
systems:
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Model
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Stock HP
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Supercharged HP
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Boost
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520i
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127hp - 147hp
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215hp
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6 Psi
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525i
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168hp - 189hp
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285hp
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6 Psi
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'93-'95 530i
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215hp
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335hp
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6 Psi
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540i
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282hp
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420hp
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6 Psi
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Pros:
- New 2year/unlimited mileage warranty program for ESS assembled
main Supercharger units.
- Supercharger is perfectly balanced to ensure super-smooth running
and long durability.
- Unique SilentDrive belt driven step-up system,very low noise (inaudible
with hood closed).
- Easy installation, due to self lubricated design which means no
oil lines from engine.
- 100% maintenance free.
Cons:
- Maximum recommended boost level is 12PSI. (higher boost levels
than 8 PSI requires extensive engine modifications.)
- Price: From $4200 to $5000.
Dinan
supercharger stage 3:
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Model
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Stock HP
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Supercharged HP
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Boost
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540i
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282hp
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439hp
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? Psi
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Not enough info.
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Turbocharger:
A turbocharger is an air pump designed to operate on the normally
wasted energy in the engine's exhaust system. The exhaust gases that
would normally flow out of the tailpipe are instread routed through
a turbocharger unit mounted adjacent to the engine.
Inside the turbocharger are two back-to-back turbines. On the exhaust
side, a turbine uses the exhaust gases flowing through it to spin.
When the exhaust-side turbine spins, so does the other turbine, forcing
air into the intake of the engine. The exhaust output controls how
fast the turbine spins, so at slower revs the turbine spins more slowly-and
forces less air into the intake of the engine. If the force of the
exhaust gases is low enough, the turbo will barely spin, if at all.
As the engine rpm increases, the turbine spins faster and forces more
air into the engine's intake. This is why turbos tend to work better
at higher rpm and why turbochargers experience what is called turbo
lag(the delayed time it takes for the turbine to spool up). Some companies
use twin turbo systems, which compensate for the low/high-end sacrifice
by dedicating one turbo to each situation. |
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Turbocharger
Dynamics:
I have seen it running on a 535i. 400 Rear wheel HP
(without intercooler, 475RWHP with intercooler) with
single turbo, no turbo lag, great setup.
Korman
Mosselman Turbo Systems:
Not much info there, the kit is available for BMW 525i (M20
single cam), 535i, 735i, iL.
- Low Boost System, 5.5-6.0 psi
- No ECU reprogramming, injector change, or air flow meter change
required. No changes to factory tuning specifications.
- Adjustable Wastegate.
- Water Cooled Turbine Bearings, Oil Lubricated.
- Price: $4650.00
New M30 power: 265 Hp
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When some people think about
Turbos/superchargers.
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| If you are working on your own E34/E32 turbo or supercharger,
email me. |
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Home of the Bmw 518i, 520i, 524td, 525tds, 525i, 535i, 530i, 540i,
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