Street Machine Australia — June 2017

Andrew at Extracted Performance Exhausts

put together a four-inch full stainless

exhaust system for our Turbo Taxi. It’s a

race system and not really designed for the

street, but it’ll be perfect for the taxi

GCG Turbos custom-built this billet-wheel

roller-bearing turbo for our needs. Garrett

doesn’t offer this exact turbo off the shelf,

so if you want the same unit call the guys at

GCG. The simplest way to describe it is to call

it a GT35/84R

We used an FG XR6 turbo exhaust manifold (bottom) on

our taxi, which is supposed to be far superior in terms

of flow to the BA/BF-style exhaust manifold (top)

GCGGCGTTurbobscustom-builtthisbillet-wheel

factory drive-by-wire throttlebody. What
we’re planning to do is see how quick the
taxi will go on low-ish boost and one set of
injectors first, and then crank it up and add
the second set.
While Jason was sorting that out, we
shipped the car down to Andrew at
Extracted Performance Exhausts. You
may remember Andrew as the guy who
did the great exhaust on Project Swinger,
and being located within five minutes of
MPW and Tunnel Vision made him an
easy choice for our system. For our turbo
Barra set-up, Andrew pressed the dump
pipe out of malleable 409 stainless using

his own custom dies, and then made the

rest of the system out of four-inch-diameter

304 stainless. It’s a race-specific system

and a pretty chunky looking piece of pipe;

honestly, we can’t wait to hear it fire up

for the first time. That four-inch pipe will

probably push us down the quarter using

thrust alone.

And that’s where we are at right now. At

the time of writing the taxi isn’t quite running

again, but it should be within the next couple

of days. By the time you read this, the next

video instalment of the Turbo Taxi build will

be on streetmachine.com.au; we’re as keen

as you guys to see this beast run. s