Brandon’s Mazda MX-5 (NC) Turbo MZR 2.3ltr

Brandon's NC MX5 Miata with 5523 Motorsports built MZR turbo

As a long time fan of the MX5 chassis I was really excited when I got a phone call to build an MZR 2.3 ltr for a customer’s 2006 MX5. On top of some neat goodies in the engine we were going to be turbo charging the car.

I can say that this car is one of the most enjoyable cars I have driven in a very long time. Putting out over 300 whp the car is an absolute blast to drive.


Cylinder Head:

5523 Race spec port and polish
5523 Spec MLS head gasket
5523 casting flash removal
5523 3 angle valve – All valve seats hand lapped
Valve seat blended to valve bowl
Short radius side of valve bowls smoothed and blended into port floors
Port size increased moderately on intake and significantly on exhaust
Head gasket surface hand finished (1200 grit)
OEM valve retainers and keepers
OEM Valve guides
OEM Valve seats
OEM Intake Valves
OEM Exhaust valves
OEM head bolts – torque to yield

Engine Block:

Weisco Pistons – 9.5:1 – 0.5mm oversize – Forged side relief
5523 spec’d K1 forged connecting rods
ARP rod bolts
5523 Spec’d fully weighted crankshaft OEM
5523 spec’d OEM bearings
Balance shaft removal
OEM main bolts – torque to yield
5523 casting flash removal

Cooling and Fuel:

5523 blueprinted oil pump
Injector Dynamics 1000 cc Injectors
DeatschWerks 265 LPH Compact In-Tank Fuel Pump
5523 Battery relocation kit
5523 modified factory harness
Mobil 1 0w40 synthetic oil
Castrol SAFXJ 75w140 synthetic LSD differential fluid ( yes, R35 diff fluid )

Turbo System:

Garrett GTX2863R Turbo with 0.64 a/r turbine housing
BEGi Turbo Kit – Heavily Modified
– 5523 oil supply lines – hard lines
– 5523 water supply lines
– 5523 ported exhaust manifold
– 5523 ported downpipe
– 5523 decked and squared flanges
– 5523 inconel hardware kit – replaced all BEGi hardware
– 5523 turbo gasket kit – stainless steel
– Turbosmart recirculating BOV
– Turbonetics silicone
– BEGi / Enthuzacar 3 inch exhaust – no cat

Drivetrain and Suspension:

ACT HD Clutch Kit – 6 puck ceramic sprung hub
Goodwin Racing Chromoly Flywheel
Tokico HTS Shocks
Eibach springs
Racing Beat adjustable sway bar end links
Hotchkins sway bars – front and rear
Powerflex urethane bushing kit


Sparco Fighter racing seat
AutoMeter gauges – oil temp, water temp, oil pressure
Turbosmart e-boost 2 boost gauge and controller