A few things have changed about the BNR as it has matured as one of the most common medium turbo upgrades for the MazdaSpeed looking for 320-400whp.New compressor housing surrounding the 71mm compress wheel and two port wastegate actuator. This along with our Boost Dial and the factory 2 port solenoid gives you excellent boost control.

2871 journal bearing CHRA remains. No more smokey K04. Journal bearing means it can be rebuilt and although it spools a little slower than a ball bearing centre section, it keeps the costs down.

The exhaust housing is still a machined K04 unit making it easy to bolt on. The bolts holding the exhaust housing to the CHRA now have special washers so they don’t back out; a common issues with older BNRs.

2871 turbo wheel in machined K04 exhaust housing. The exhaust housing allows you to brace the turbo from underneath meaning tubular exhaust manifolds are less likely to crack.

Happy turbo-ing!

The COBB AccessPort V3 is out and we’ve had a chance to work with this very nice new piece of hardware.

When datalogging as part of the tuning process, it’s important to log the parameters you need and no more than this to avoid clutter. Different tuners have different preferences. We have a parameter logging list that we recommend and we often get asked how to set these logged parameters. The short video below describes this using the new AP V3.0. This procedure works for all the vehicle supported by the COBB AP V3.0 (MazdaSpeed, Mitsubishi Evo, Subaru STI, WRX, Nissan GT-R, BMW, Focus ST)

Happy Logging!