MX5 NA6 from Australia
 

Made a few posts on here so I thought I would make a post with my car in it. Sorry but at the moment it is naturally aspirated, however you never know what the future holds...

Worst Mod - Roof air scoop. It is great for ducting air into the cabin but it is noisy when on the road. On the track with a helmet on you don't hear it.

Best Mod - Custom ITB airbox and getting the fuel level to display on the IQ3.

Next mod - custom wing mounts as the current setup has too much side to side movement. There will be bracing inside the boot as well as the new mounts.

https://www.miataturbo.net/attachmen...ine=1434091111DSCN2348 by Eipeip, on Flickr

https://www.miataturbo.net/attachmen...ine=1434091111DSCN2334 X by Eipeip, on Flickr

https://www.miataturbo.net/attachmen...ine=1434091111DSCN2337 by Eipeip, on Flickr

https://www.miataturbo.net/attachmen...ine=1434091111DSCN2369 by Eipeip, on Flickr

https://www.miataturbo.net/attachmen...ine=1434091111New Engine Bay by Eipeip, on Flickr

Automotive Plus Custom ITB Air Box (before paint). Trumpet lengths approx. 110mm
https://www.miataturbo.net/attachmen...ine=1434091111IMG_2479 by Eipeip, on Flickr

https://www.miataturbo.net/attachmen...ine=1434091111IMG_2481 by Eipeip, on Flickr

The wheel collection (and a MX5 NA6 shell...)
https://www.miataturbo.net/attachmen...ine=1434091111DSCN2602 by Eipeip, on Flickr

Engine/Engine bay:
Haltech PS1000 ECU
E85 (flex fuel setup)
COP's
NB8 Block (Toda 85 mm pistons, Toda 0.8mm head gasket, Toda timing belt, Carrillo Super A-Rod, balanced lightweight flywheel/HD clutch/crank, Main Bearing Support Plate upgrade, ACL Race bearings)
NA8 head (flowed, port matched, Toda 288 deg in/ex cams, over 10mm lift, base circle reduced, ramp angles softened, titanium springs, 1mm oversize valves)
11:1 compression
Toda adjustable cam gears
Racing beat header/exhaust (full front to back)
Jenvey ITB's 725cc injectors
Tomei fuel pressure regulator
Custom (Automotive Plus) vacuum lines from ITB's
Custom (Automotive Plus) coolant reroute
Custom (Automotive Plus ITB Air Box)
Peterson's Remote Relief Valve
Toda oil pump gears (oil pressure control shimmed so it no longer functions)
Custom oil catch can and breather lines(Automotive Plus)
PWR radiator/oil cooler combo, (custom Automotive Plus) shroud and 2 x SPAL fans.
Radiator cooling panel
Custom (Automotive Plus) oil lines
Oil filter relocation
Air con removed
Power steering - depowered
Cartek coolant alarm (rigged up to a 110 db alarm and warning light
Cartek isolator

Driveline
6 speed box (built for up to 400 Nm of torque)
MiataRoadster short shifter
4.3 Torsen diff
NB8B brakes
NB8B proportioning valve
Braided brake lines
Trackspeed Engineering Brake Ducts as well as custom (Automotive Plus) ducting from GV lip.

Suspension
BC Racing ER's
Butterfly brace
24mm adjustable front sway bar (Whiteline)
Stock rear sway bar adjustable
Super-Pro Eccentric Kit (allows up to an extra -3 deg camber)
SRI Rear Upper Adjustable Arms (allows up to an extra -3 deg camber)
Corner balanced (have Intercomp scales at home)

Exterior
949 Racing FRP GTC-200 rear wing
Jet Stream Rear Diffuser
GV front lip, GV bonnet, GV front/rear wind deflectors
Custom splitter (upto Version 3 now)
KazeSpec Engineering Heim Rod Front Splitter Mounting kit
Carbon fibre roof scoop
Carbon fibre side mirrors
Pitcrew racing single wiper
Dapper HID Projector headlights
Custom blue/silver paint
Rain light
Smoke indicators (front)
Tow hooks (Garage Star Tow Hooks | Garage Star)
Offset License Bracket .
Hardtop Rain Rails

Interior
Automotive Plus Plus Tallboy roll bar
Shift-i shift light
IQ3 Display Dash
Quick release
Mono D type steering wheel
Terraphone intercom
Single warning light if oil or water goes over 120 deg c Coolant alarm light
Cartek Rain light switch
Innovate Data logging (4 x EGT's, oil/water/2 x air intake temps, fuel/oil/brake pressures, RPM, wheel speed, accel/side G force, steering input, AFR, TPS). LMA-3, SSI-4, TC-4, MTX-L: Wideband Air/Fuel Ratio Gauge, MTX-D: Oil Pressure & Temperature, MTX-D: Water Temperature & Battery Voltage and DL-32 daisy chained.
Iron Canyon Motorsport fuel sensor
2 x Sparco Sprints (and harness to suit)
VBOX Lite camera (with micro module)
Hardtop Brackets
Custom Gear Knob
Leather Door Pulls
Fire extinguisher

Thanks for joining, Eipgam!

Which 6 speed is it Mark?

I always worry about mine breaking!

Love the build, that ITB air box setup is pretty neat. Welcome!

Timk - OEM 6 speed

FrankB - thanks it took a while to get the air box right. For a RH drive car it fits under the OEM bonnet as well as retains the booster and clutch in their OEM positions. For LH drive cars you do not have those constraints.

What has been done to it for it to be "built for up to 400 Nm of torque", or is that how they come?

The gearbox was rebuilt just before I purchased it from Victoria. Gears were replaced by deburred, polished, Cyro treated then shotpeened ones.

The fuel guage setup is a sensor from Iron Canyon http://www.ironcanyonmotorsports.com/icm-fuel-sender/, this is then hooked into the Haltech PS1000 (and into the Innovate data logger) to be displayed by the IQ3.

Black line is speed (kmh) and the blue/green line is the fuel level (ltrs).

Home to coffee about 80 kms.
https://www.miataturbo.net/attachmen...ine=1435953675Fuel_01, on Flickr

Coffee to home
https://www.miataturbo.net/attachmen...ine=1435953675Fuel_02, on Flickr

Well been a while since this was updated...

It is still naturally aspirated
https://cimg2.ibsrv.net/gimg/www.mia...efd492b543.jpg
At WTAC 2019

However two very concerned US based Miata owners decided to do an intervention (Ryan and Moti) as to why I was staying NA.... Well a funny thing happened, it has been decided that putting a forced induction 2.5ltr MZR into a NA6 would be 'smart".

Why into the NA6 and not the NC? Under World Time Attack Challenge rules the NA6 is allowed to be 893kgs whereas the NC is 1,055, hence I get a 162kg advantage using the NA chassis.

Will start a new thread when the serious parts of the build start.

Current concerns:

1. Space on Right Hand Side for exhaust, turbo and steering column. The car has already had the brake booster deleted and the remote fluid reservoirs can be relocated to inside the car.
2. What gearbox to use. Have access to a BMW ZF 6 speed or just go with the OEM NC 5/6 speed. Using the NC is less work.
3. Swapping the NA subframes for NB ones. Clubsprint requires the use of OEM subframes.
4. Front/rear hubs again these must be OEM.

Non issues

1. Current Haltech PS1000 can be used in new build, just requires a new engine loom.
2. Current installed Racepak Smartwire can be used
3. Aero - have a new wing to be built. This has more downforce than my current one but less drag. Front air dam is being re-designed. OEM Rear bumper going back on (not allowed bumper cuts in clubsprint)

Any suggestions/ideas appreciated

https://cimg3.ibsrv.net/gimg/www.mia...8f456a4f87.jpg
The person on the left is 50% responsible for the new direction of this build :)

Just doing my duty :)

this person is the other 50% of the blame :)