We're tootling along at 100 km/h on the freeway behind the
wheel of an APS Phase 3 kitted XR6 Turbo. After a cursory check for police, we
nail the throttle to the floor. Whoo-ah! The big Ford's nose lifts heavenwards
and the speedo needle swings to 200 km/h in a blink. S-h-i-i-t! This bugger
defies all laws of physics - cars aren't supposed to accelerate like that!
We do it again to confirm that what we were experiencing was
real. Once again, the tweaked XR reels back on its suspension and accelerates at
a rate that no other streeter could possibly hope to match. This is simply
awesome stuff. And as if the sheer speed isn't enough, all this comes with
absolutely factory-like starting, idle, smoothness and drivability...
To say we're blown away is an understatement; the APS Phase 3
kit sets new benchmarks for modified cars. We kid you not.
So what is this Phase 3 kit, you ask?
Well, at the time of writing, the Phase 3 kit is yet to be
released and its state of tune (ie boost, ignition timing, etc) is yet to be
finalised. This story is essentially a prototype preview.
On the other hand, the hardware of the Phase 3 kit has been
given the final go-ahead. The kit comprises a replacement exhaust, high-flow
cold air intake, front-mount intercooler, high capacity injectors and fuel pump,
along with a UniChip.
The APS replacement exhaust is a beauty. The system starts at 3½-inch diameter from the back of the turbo and divides into twin 2½-inch pipes
about half way along its length. A German-sourced 3½-inch cat converter, a
straight-through centre muffler and a straight-through rear muffler keep
tailpipe noise well below the 90dB legal limit. On the road, the system gives a
sophisticated growl but there is a slight resonance at certain combinations of light loads and
rpm. But, really, we doubt that many enthusiasts would care (or even notice). The
system is constructed from 304-grade stainless steel and Peter Luxon from APS
says that even the flanges are cast in stainless to further protect against
corrosion.
The APS high-flow cold air intake improves performance while
maintaining the factory under-bonnet appearance. Peter explains the factory
airbox was tested with a manometer and it was decided that only the feed duct
into the airbox needed improvement. The new duct is cast in aluminium and
features very smooth internals to ensure maximum flow. The only questionable
aspect of this mod is induction noise - there's quite a loud 'turkey gobble'
noise from the turbo system when you back off the throttle sharply after driving
on boost. Again, though, many enthusiasts won't mind.
Like the air intake, the APS DR-series intercooler installation
looks factory and is barely noticeable when you pop the bonnet. An imported
bar-and-plate core was chosen after extensive back-to-back testing and we're
told it's as large as you can fit in the Falcon nosecone without cutting metal.
The DR-series 'cooler measures no less than 4½ times the volume of the factory
intercooler!
Interestingly, the Phase 3 kit also includes a replacement
wastegate actuator assembly and a high-flow turbocharger swing valve.
The replacement actuator helps maintain accurate boost control while the new
swing valve allows a large volume of exhaust gas to flow through the wastegate
bypass. This helps protect against overboosting and minimises backpressure.
The standard XR6 Turbo fuel system does not offer much scope
for generating extra power. APS addresses this on the Phase 3 kit by fitting an
upgraded fuel pump and a replacement set of six injectors. And these aren't any ol'
bigger injectors - APS shopped around for the units that would provide the
appropriate fuel atomisation and spray pattern.
One of the most impressive aspects of the Phase 3 kit is the
level of performance achieved using an interceptor module. The use of a UniChip
in a 300+ kilowatts at the wheels Falcon proves that interceptors are suitable
for much more than slight power-ups. On the XR6, the real-time programmable
UniChip provides control over boost pressure, ignition timing and fuel mixtures.
Note that adding the UniChip means the factory electronic
throttle control and traction control system (on XR6 Turbo sedans) remain fully
operational.
Now let's get into the all-important numbers -
power, quarter mile and price.
Immediately before our test drive, we watched the Phase 3
kitted XR6T sedan (which is owned by Sydney's C&V Performance)
perform three consecutive power runs on APS's Dyno Dynamics chassis dyno. The
results are mighty impressive. This graph (conducted in Shoot-out Mode 6 and
with the auto transmission in 3rd gear) shows the development-spec
Phase 3 XR6T pumping out 327kW at the wheels without too mush stress. The lower
plots reveal that boost peaks at 19.5 psi in the mid-range and tapers to 16.5
psi through the top-end.
To put this 327kW ATW into context, Peter says a stock-standard
XR6T generates anywhere between 175 and 193kW on their chassis dyno - in other
words you're talking almost double the power! And despite running up to
19.5 psi of boost, there was no detonation present with 98 RON Shell Optimax in
the tank.
Sensational stuff or what!
A few days after our test-drive, the Phase 3
sedan made at appearance at the Calder Park drags. Unfortunately, problems with
the (already tricked) transmission prevented the car running to its full
potential - but there was another Phase 3 development ute that we can take as a
yardstick. With slightly less power than the sedan but with treaded slicks under
the rear, the ute managed a best time of 11.66 seconds. Not hanging around!
Of course, many workshops can build an 11-second car but it's
the absence of any trade-offs that makes the APS kit so special. The engine
fires into life as quickly as a stocker, the idle is so close to factory it
doesn't matter, fuel economy is potentially improved and the spread of torque is
extremely useable and linear. There're no problems dawdling along in slow traffic
and you can breathe easily if you ever need to lend the car to a friend - you
might want to pass on a gentle warning about the performance at anything more
than about half throttle, though...
Is this the perfect go-fast streeter? Well, yes - what else
could you want?!
The Question of Durability
The
Ford XR6 Turbo's driveline is widely recognised as a weak link. Peter tells us
APS is currently testing a number of different clutches, torque converters,
auto trans modifications and various other driveline components that should be
on the market soon. Stay tuned.
APS
is also developing a large capacity coolant radiator and full-flow oil cooler
suitable for extreme applications.
Pricing for the Phase 3 kit is yet to be finalised but Peter
was willing to offer us a ballpark figure. He expects that the addition of the
front-mount intercooler, larger injectors, upgrade fuel pump and actuator and
machining will add approximately $3100 to the $5650 cost of the less potent
Phase 2 kit. (Stay tuned for our up-coming review on the Phase 2 upgrade.) That
comes to a total of $8750, which - no matter how you cut it - is simply awesome
value for money.
It is expected that the Phase 3 kit will be released in early
2004 once it is officially emissions and noise level approved. Once it hits the
market green light, this upgrade will change the face of Australian street performance
forever!
|
The
Really Big One Coming
As
if the Phase 3 kit isn't impressive enough, APS is also developing the 'big gun'
Phase 4 kit. This bar-nothing enhancement will include a replacement intake
plenum with six extra injectors, possibly a modified or larger turbocharger and
more.
Development
is still very much continuing but things certainly look on track... just take a
look at this dyno graph! With up to around 22 psi boost you're talking just
under 400kW at the rear wheels!
APS
expects to release the mighty Phase 4 kit in mid-to-late 2004.
|
|