This is my fourth Miata and it is far and away the best Miata
ever made... newer or older. It has all the built-in fun of a Miata
but with the power to match the handling. A Miata with balls!!!
But with the confidence of a factory turbo installation. This car has almost every MAZDASPEED performance option available
standard from the factory and originally under a 4 year warranty. It is a
conservative design that makes them just as reliable as a normal Miata.
My goal has been to keep the car absolutely stock
in appearance and to maintain reliability, everyday drive-ability
and stock noise levels... while bringing out the performance
potential that is in every MSM. After installing the
boost gauge, I realized that the OEM setup was getting only about
6 lbs of boost and only for short bursts and at only high RPMs.
And at the same time the 6-speed close ratio gearbox and the the
very short geared 4.1 diff made it very awkward to get the engine
up to boost level for enough time to get the 180+ HP out off the
car. You had to skip gears to keep the engine anywhere near
optimum boost.
I made the $1500 upgrade of the diff to a
longer 3.6 gear ratio using parts imported from Mazda Australia.
This is now setup the way it was sold in Australia and Europe
with gear ratios that allow the powerful 180+ HP engine to
perform to its potential. I have also made some
conservative upgrades to the the intake plumbing, the leaky stock
blow off valve and the OEM boost controller. That lets me
run the engine at a conservative 9 psi, well within the stock
ECU's capabilities, while improving the torque by 17%. The
performance improvement is documented with Mustang dyno runs.
All the replaced stock parts and documentation
for all upgrades are included along with any spare parts I have.
The car also comes with the official Mazda Workshop Manual,
Wiring Diagrams Manual and the 2004 MSM Dealer Tech Summary.
The odometer mileage reading is currently is 43,700
MAZDASPEED GT Model Standard Features
Powertrain
- 1.8L DOHC turbocharged and intercooled
16-valve 4-cylinder engine
- 180 hp@6000 rpm; 166 lb-ft torque@4500 rpm
- IHI turbocharger with 7 psi
maximum boost
- Front-mounted air-to-air intercooler
- Iridium spark plugs
- Larger radiator core; increased cooling capacity
- Higher-capacity oil cooler
- Euro-spec fresh-air duct
- Red wrinkle-finish valve cover; anodized
aluminum MAZDASPEED oil cap
- Short-throw 6-speed manual transmission
with shot-peen-hardened gears
- Heavy-duty clutch
- Heavy-duty 25mm driveshafts
- Bosch torque-sensing limited-slip differential
- Sport-tuned stainless exhaust with large
MAZDASPEED exhaust tip
Suspension and Brakes
- Silver-painted shock-tower brace
- Optimized steering rack
- MAZDASPEED-tuned and lowered
double-wishbone suspension which includes:
silver-painted BilsteinŽ shock absorbers with firmer tuning; red-painted larger front and rear stabilizer
bars; higher-rate springs
- Power-assisted 4-wheel disc brakes with silver-painted
calipers, standard Anti-lock Brake System (ABS) and
Electronic Brake-force Distribution (EBD)
Exterior Enhancements
- 17" x 7" Racing Hart™ aluminum alloy wheels (I sold mine)
- W-rated 205/40R17 Toyo Proxes R28 unidirectional high-performance tires
(sold these too)
- MAZDASPEED front and rear air dams and rear spoiler
- Smoke-tint headlight housings
- Body-color cap for inside rearview mirror with MAZDASPEED logo
- Unique exterior colors: Velocity Red Mica and Titanium Gray Metallic
Interior Enhancements (GT Model only)
- Black leather-wrapped steering wheel and shift knob with red stitching
- Black leather-trimmed upholstery
with red stitching
- Silver gauges with MAZDASPEED logo
- Cloth convertible top
- MAZDASPEED floor mats, stainless-steel
scuff plates and alloy foot pedals; silver
mesh finish on center panel and shift panel
- 225-watt AM/FM stereo with automatic level control and in-dash
6-disc CD changer
- BoseŽ 6-speaker sound system with door mounted tweeters
My Mods and Upgrades
- Conservative Turbo Upgrades provide:
- 17% increase in torque available starting at
2500 RPM:
- ~193 hp@6087 rpm; ~195 lb-ft torque@4230 rpm*
- ~147 rwhp@6087 rpm; ~149 rw-lb-ft torque@4230 rpm*
- Autometer Boost Gauge (installed in Left-Side AC Vent)
- TurboSmart Blow Off Valve upgrade
- TurboSmart Manual Boost Controller set to 9 PSI
Boost,
- Throttle Body Elbow upgrade from BEGi (Bell Engineering)
- 2004 Miata Special Edition 16x7 Silver Alloy Wheels
- W-Rated Toyo 205/45R16 Proxes4 High Performance All-Season
Tires
- Oil Pressure Sender
Upgrade with Low
Pressure LED in Instrument Cluster
- Oil Pressure Gauge Modification to
provide variable pressure reading
- Matching Titanium Gray Hardtop
- RoadsterSport III high flow muffler
- Thompson Oil Filter Relocation Kit
- Moss Interior Light Kit with custom time delay and fade
circuit
- Dual-Tone Loud Horn Upgrade
- GROM USB/iPhone Adapter for Bose Radio - Use USB
stick or iPod to play all your music
- Jeff Anderson CB/radio dual antennae splitter - uses MSM
antennae for radio and CB
- Fog Lights modified to switch on-off independent of
headlights - Use as safety DRLs
* HP and Torque flywheel rating
calculated at rw reading x 1.31 for Mustang Dynamometer conversion
factor
