Mad Mazda 323
This page is a bit plain at the moment but I put it up because a couple of people had
asked me about my car's specs. So I decided to list them and provide a bit of extra info.
as well.

More Photos
The humble looking little hatch in the photos is a 1986 BF series Mazda 323 limited
edition. The car was given to me a few years ago by a friend of the family and had been
owned since new by a single owner. This particular model 323 is a full import
and sports the original factory two-tone colour scheme. ... very few
of them were sold here and now that I have started to play with it, it has become very unique
indeed :-)
Factory features:
- 1.6L SOHC EFI engine (B6 designation)
- Power Windows/Mirrors and Sunroof
- Central Locking (I have added a central lock activator on the drivers door and an alarm
for remote activation)
- Cruise Control
- Air Con (not active since engine swap, I need to get some pulley brackets)
- Electronically adjustable suspension with normal, sport or cruise (replaced with Koni's)
- Larger than normal sway bars (the front one is about 28-30mm I think)
- Headlight Washers and massive water bottle which I had to rip out because the engine
mount of the DOHC motor got in the way ... unfortunate since it would have been great for an
intercooler water spray :-(
- Factory 14x6" alloys
- Two tone paint job (black with silver trim)
- Electronic Dash
- Electronic heater controls (no manual cables)
- 4 wheel discs (ventilated at front, solid at rear)
The only thing conspicuously missing is power steering (which seems a bit strange to
me)
Modifications
Okay, that is the routine stuff, here is where it gets a bit more interesting.
- B6 turbo transplant from a Jap Import Front cut (97,000 k's when I the motor it). This
motor is EFI 16V DOHC 1.6L intercooled turbo and was a homologation job for the world
rally championship in which Mazda raced their 3dr 4WD drive version of the BF 323. Front
cut came from Adelaide Jap Dismantlers with
pretty much everything including engine, gearbox, driveshafts, discs, intercooler,
radiator, ECU, knock controller and various relays etc. I put the engine in myself in my
garage with the help of a friend. It actually wasn't that hard since it was mostly a bolt
in given that it was from the same series 323. The only really difficult thing was wiring
up the loom which was quite a lot different from the original one, this probably caused me
the most stress! I was lucky enough to get my hands on the factory workshop manual and
wiring diagrams from Bookworks in Melbourne and I would have been really stuck without
them. Also note that because the original SOHC 1.6L was fuel injected all of the fuel
lines etc. were exactly the same. Doing this to a carby model would be significantly
harder ...
- Front mount Supra intercooler (fitted by me but custom piping done by
Promaz is Thomastown)
- High flow IHI turbo running 39mm compressor wheel (old turbo blew up due
to overboost!)
- 3" mandrel bend exhaust including custom 3" dump pipe, high flow cat,
resonator and straight through muffler - also had a pyrometer installed so that I can
measure exhaust gas temperature (at this stage I connect it to a multimeter with a K-type
input when I want to check the temp)
- O2 Rush panel filter in the stock air box with a 3" cold air duct feeding from a
cut out in the bumper
- Malpassi standard rate rising rate adjustable fuel pressure regulator (visible on the
back of the firewall next to the fuel filter)
- Goss high flow/high pressure in tank fuel pump (this was a direct bolt in replacement
for the standard Denso unit) click here for details of fuel enrichments mods
- Switch activated boost bleeder (visible on the back of the firewall next to the fuel
pressure regulator) running about 15 P.S.I ... but creeps to 18 due to
wastegate being a bit small
- Pricol Boost and Oil pressure gauges and Jaycar air/fuel ratio LED (customised with a
much cooler looking bar graph display). EGT coming soon (I already have the pyrometer
installed in the custom dump pipe just after the turbo so I can check temp on my
multimeter and it is well within safe zone ... stays in the six hundred Celsius range even
with hard city driving)
- Falken Azenis ST-115 195/14/60 rubber on the stock alloys
- Koni Red shocks revalved to be very stiff (much stiffer than stock
Yellows) with 30mm lowered GT heavy duty springs
- Whiteline strut brace
- dba slotted rotors all round with bendix ultimate pads
- Centerforce clutch
- Rear roof spoiler from a 3DR BF hatch.
- Timing is advanced 3 degrees over standard
- NGK BCPR7ES spark plugs (these are one range colder than stock)
- Car runs on Mobil 1 and drinks only 98 octane Optimax
- Car audio buffs may have noticed the red 4 gauge running down the back of the firewall
which gives an idea that it might be packing a sound system and a few amps in there
somewhere too :-)
- Sabelt 4 point harnesses on both front seats
- Tint a Car Formula 1 tint
- Autospeed
Intercooler WaterSpray kit (doesn't really need it anymore)
With the exception of some of the suspension work (e.g. revalving Koni's) and
the exhaust, all the work was done by myself (with
a bit of help from friends).
Comments
Despite the mods I haven't had the car dynod yet so I can't give any power or torque
figures but I would guess about 120-130kW at the front wheels based on AP-22
meter readings. Traction is a problem but can pull 0-100 in low 6's with a good
launch.
In gear acceleration is excellent with fast turbo spool up, nice smooth torque onset
and a strong pull right through the rev range. I have had a number of people wind down the
window at the lights and say what the f*ck have you got in that thing!
The car is a real sleeper at the moment and I really do have some fun with it, although
I do want to dress it up a bit with some better alloys and some bonnet vents (which are
also functional in that they will help lower under bonnet temps). The only give away that
it means business is the chrome 3" tip out the back and the growl that it makes at
the lights and the ROAR that it makes on full boost ... to give you an idea I rarely lose
a traffic light run with victims including stock WRXs, Cordia, Exa, Lancer GSR and Pulsar
turbo's, Tickford XR8 (EB series) etc.
Considering it
is FWD, it is quite a good handler. The stiff rebound on the shocks has also
drastically reduced squat and front wheel spin and I can now launch the car pretty well
with high boost in first gear and torque steer is virtually non-existent. The car
doesn't have much body roll and hugs the road during cornering although it still
tends to understeer when pushed and doesn't have a great amount of suspension travel so will hit the bump stops on train lines etc. if taken too
fast.
The dba slotted brakes and ultimate pads are a major improvement over stock and
although not mind blowing they do a pretty good job of stopping the car which probably
doesn't weigh much over 1000kg..
The exhaust sounds pretty wild (like a rally car) but is a little on the loud side and
would sound nicer if it had a slightly deeper note. The turbo also sounds nice as it
spools up and although not overly loud it has a fast purposeful whine (enough for car
enthusiasts who know what it is to turn and stare as if to think "is that coming from
that??")
Possible Future Mods:
- Larger Injectors and either interceptor or aftermarket computer
- Bonnet vents (and maybe front bumper and driving lights) from Familia GT-R.
- 1/2 or full roll cage (as a safety feature rather than looks since it is quite a small
car)
- Remove distributor and replace with cam angle sensor and twin coil waste spark setup
(would necessitate aftermarket computer, Haltech and Autronic are my two picks)
- Remove air flow meter and replace with MAP sensor (used in conjunction with aftermarket
computer)
- Copper head gasket
Technical Resources
Some of my sources of knowledge for the project included:
- The Factory Workshop Manual for a KE Laser (which is really just a 323 in disguise) This
was indispensable!
- Julian Edgar's book 21st
Century Performance (highly recommended!)
- Maximum Boost by Corky Bell (Avail. in Australia from Technical Bookshop in Melb.)
- Various magazines such as Zoom (very good), Hot Fours (pretty low brow but
sometimes has some good tech articles and some nice cars to provide inspiration), and
Autospeed (I am a subscriber of this online magazine which also has some excellent and
very innovative tech articles aimed at the average punter),
- Resources on the Internet (the BF series 1987-1989 Mazda 323 GTX is a bit of a cult car
in the U.S so there was a fair bit of info. from people who had modified this car over
there)
- aus.cars newsgroup especially from a couple of people with modified TX3 Lasers
- a bit of advice from pro's like maztech, chiptorque etc. who I mostly ignored and just
went and did my own thing :-)
Links:
TX3/GT-X Central (excellent site with lots of
technical information and readers cars)
Mazstyle (bodykits for BF-BG 323 and TX3)
Mazda B6T bits 'n pieces
(large U.S 323 site)
Autospeed Magazine (Best online technical
magazine ... and Australian too!)