- The Toyota AE86 is undoubtably one of the most iconic cars to ever come out
of Japan and Beau Yates' example behind me is one of the cleanest we've ever seen.
Beau Yates is best known for drifting and in fact this car was his competition
drift car for a number of years.
It was actually heavily damaged at World Time Attack Challenge a number of years
ago and has gone through a complete rebuild.
Recently for this year's World Time Attack Challenge it's actually been redeveloped
as a Time Attack car, specifically for the Japanese driver Keiichi Tsuchiya to compete
in the open class.
While it might not be for the purist, the factory 4AGE has been replaced
in favour of a BEAMS 3SGE from the Toyota Altezza.
Now this gives it a little bit more capacity in the fact the engine is two litres.
It also features variable cam control so it's a little bit more advanced that the
ageing 4AGE.
The engine has been fitted with a host of internal upgrades consisting
of connecting rods and pistons to handle the additional power that comes
from the turbocharger that's been fitted to it.
In terms of the head, it is 100% stock standard, including the cams.
Now because of the original ECU that was fitted during the initial build,
the variable cam control on the exhaust cam has actually been deleted,
and this uses a fixed vernier adjustable cam gear.
Continuously variably cam control is still available on the intake cam.
And this provides a wider torque curve than we could normally hope to get
with conventional fixed cam timing.
Producing the boost pressure on this engine is a Garrett GT 3576 turbo,
that's fitted to a Hypertune stainless steel tubular exhaust manifold.
This feeds into a Hypertune front mounted intercooler and then across to the
Hypertune customer plenum chamber with drive by wire throttle body.
One of the keys to keeping this engine reliable over the number of years
it has been competing now, is the custom dry sump lubrication system.
This draws oil from a oil reservoir mounted in the boot, and ensures that
regardless of the lateral G Forces, acceleration or braking forces,
a consistent supply of high pressure oil, is always available to the engine internals.
Backing the engine is attractive six speed sequential transmission that
originally saw duty in Beau's competition GT 86 drift car.
This uses a strain gauge gear lever that allows clutchless upshifts and via
the drive by wire throttle body, it also provides an auto blip on the downshift.
At the rear of the car, the factory 6.7 inch AE86 rear end was never going to hold
up with the sort of power the 3SGE could produce.
It's been replaced instead with an eight inch Hilux differential,
which uses a spool.
When fitting the Hilux differential, a proper four link setup has been used
with equal length arms and this has required boxing in of those top arms
which you can see in the rear of the car.
Another important change with the rear end is that the stock pan hard rod that
normally locates the axle laterally in the car, has been replaced with an
adjustable Watts linkage.
Now this actually allows the roll centre to be adjusted easily through an
adjustor that can be accessed in the boot of the car.
The electronics package in the car consists of an Emtron KV8.
Now that's responsible for all of the engine control aspects as well as
boost control, gear dependent boost, and also the changing of gears,
both up and down through that attractive six speed sequential
transmission.
A Motec PDM has been installed, which is a power distribution module.
This gets rid of conventional fuses and relays and controls the power distribution
to all of the circuits on both the engine as well as the chassis,
using essentially steady state electronics.
This gives a lot more configurability as well as a lot more control of those
circuits and the fusing or protection of them.
In terms of logging, the Motec C125 dash is fitted.
This provides a central logging hub for all of the information from the PDM,
as well as the KV8 ECU, as well as track timing from a GPS beacon.
This allows analysis in the pits after competition use to improve both
the driver as well as the car.
Now you're probably wondering how much power this car produces.
And at the moment the power is actually limited by the fuel system fitted.
It's running a relatively modest 320 kilowatts at the rear wheels,
running only 17 psi of boots.
It's fair to say that once the fuel system is upgraded, more power is only
as easy as increasing the boost pressure slightly.
Despite that relatively modest power level, Keiichi Tsuchiya has already set
a one minute 35 lap around here on his very first run in the car.
We're expecting with today's dry conditions and a softer set of tyres
fitted to the car, that he's going to improve on that, and we look forward to seeing
what lap times the car is capable of.
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