- Behind me is a street driven, street legal, Evo 8,
producing 1238 wheel horsepower,
and running 74 psi of boost.
We're gonna find out what makes it tick.
Starting at the heart of the car with the engine,
it's still powered by a 4G63,
but in order to run those sort of trap speeds
in the Flying 500 requires an insane amount of power.
This particular car is now producing 1238 wheel horsepower
on Mick's rolling road dyno.
Now it's good to point out here that that particular
reading was produced with the car wheel spinning.
It's almost impossible to hold down that amount of power
on a rolling road with a relatively light chassis like this.
So the actual power reading is probably anyone's guess.
Making that sort of power with a factory cast 4G63 block
is possibly achievable but it's certainly not going
to be reliable so Mick's Motorsport reached straight
to the top shelf with a Bullet billet aluminium block.
Now this particular block is also
the high deck 4G64 version.
Now the reason they went with the 4G64 taller deck block,
is to allow a stroker crankshaft,
in this case a Nitto 94 millimetre stroke crank
which takes the engine capacity out to 2.2 litres.
The taller 4G64 block allows a longer 162 millimetre
Manley conrod to be fitted and this ensures a reasonable
rod to stroke ratio with a longer stroke crankshaft.
The pistons are a custom CP forging with a 9.5:1
compression ratio, and this is relatively low,
given the fact that the car runs on E85.
But the reason the 9.5:1 compression ratio
was selected is to allow the engine to run
an insane 74 psi of boost which is what it uses
to achieve that 1238 wheel horsepower power figure.
Speaking of boost, that's provided by a 7685 Precision
gen2 turbo charger,
and boost control is via a pair
of Turbosmart external wastegates.
The actual electronic control
is provided via the Haltech ECU,
which allows gear dependent boost,
and Mick can step up the boost as the car goes down
the track and through the gears.
This is really important because obviously there's no way
that the car would be able to put a full 1238
wheel horsepower to the track in first and second gear.
Moving to the intake side of the engine,
this is fitted with a Plazmaman plenum chamber.
The fuel supply is obviously critical when we're making
this sort of power and this is provided via
a set of eight Siemens 2400cc injectors.
Getting enough fuel flow through to those Siemens injectors
is also a challenge and Mick has fitted
a Kinsler mechanical fuel pump that's run
off the end of the intake camshaft.
The fuel is provided up to the Kinsler mechanical pump
via a standard Bosch electric 044 fuel pump.
Keeping these engines alive is challenging,
particularly when they're making this much power,
and Mick's gone with a full dry sump system
for lubrication here from Norris Designs.
This is a bolt on system for the late model Evos.
The dry sump lubrication system ensures
that regardless of the acceleration or cornering
or braking forces, a constant supply of high pressure
oil is always given to the vital engine components.
One of the problems with maintaining reliability
with any high boost turbo charged engine.
is ensuring that the head gasket seals properly
to the engine block.
Under high boost pressures,
the combustion pressure can tend to lift
the cylinder head off the engine block,
allowing the combustion pressure to escape
into the cooling system.
Mick's Motorsport have used a relatively novel technique
here to seal the cylinder head to the engine block.
They use a set of aluminium bronze sealing rings
that are located into the top of the cylinder bores
in a groove and these seal directly onto the cylinder head.
The oil and water passages between the cylinder head
and the engine block are then sealed with a copper gasket.
The drive train is another area that needs to be addressed
in a Mitsubishi Evo making this much power.
And in this instance Mick's Motorsport have fitted
a Samsona six speed sequential gearbox.
With this particular gearbox the driver doesn't
need to lift off the throttle for a gear shift,
and this helps keep that large precision turbo
on full boost as the car goes down the drag strip
or down the Flying 500 here at Eastern Creek.
Controlling this engine is a full suite of electronics
from Haltech.
Starting with the Haltech Elite 2500 ECU,
this is in charge of all of the engine functionality
including the staged injection system there,
with the eight Siemens injectors.
The Haltech ECU, as I've also mentioned,
also controls the boost dependant on the gear.
The Haltech's also fitted with a TC4 thermocouple amplifier
and this takes input from four exhaust gas temperature
sensors fitted in each runner of the exhaust manifold.
This allows the exhaust temperature on each
exhaust runner to be measured
and this can allow Mick to adjust the individual fuelling
to each cylinder to ensure that the engine is running
equally on all cylinders,
and ensure that one cylinder isn't running leaner
or richer than another.
A Haltech WB2 wide band to cam unit is also included
to give wide band air fuel ratio data.
This is transmitted through to the Haltech Elite ECU,
and can be used for logging purposes,
for tuning purposes, and also for closed loop fuel control.
Now it's important to note that this is a 100%
full street car.
It is regularly driven on the street,
and to make its results more impressive
here at the Flying 500,
it's actually heavier than a standard Evo 8,
by virtue of the fact that it's running a full cage
to meet the safety requirements.
Its safe to say with 1238 wheel horsepower,
and a win at the 2016 Flying 500,
Mick's Evo 8 really is pushing the limits
of what a street car's capable of,
and we wish them all the best for today's final.
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