Over the years, I've answered quite a few questions on how exactly the Mazda MZR DISI 2.3l Turbo load targeting logic works. So, I thought I'd take some time to put together a clear diagram showing the load targeting logic. For those used to simpler but less consistent boost targeting, this may be ...

I do not recommend upping the fuel rail pressure targets, because with aftermarket HPFP internals the pump will already make 50-100PSI over target, and if you up the target then the pressure relief valve (which is mechanical) will work full time an will eventually fail. The flow is proportional wit...

Good morning everyone, I'm a Tune newbie. My setup is: stock engine, 76mm intake and exhaust, HPFP internal parts, turbo is Pulsar G25-660 AR.70, MAF installed on the turbo line, between BOV and the throttle body. I'd like to ask if our Fuel Pressure Target needs to be changed? Because I observed on...