Custom harness sensor selection

I’m building a Mazda FE3 2.0, and by utilizing SR20 billet intake and tubular exhaust manifolds, have added a G25 top mount turbo. It will be running a Bosch 74mm DBW throttle body so Ive purchased a Haltech 1500 to control it, as well as a universal unterminated harness. Target power is around 400-450bhp on 93 pump.

Im trying to select an appropriate sensor package for the engine, preferably something a little more updated. I’m also trying to find what separates a $160 “Race Spec” MAP sensor from a $16 Bosch MAP/IAT from a VW TDI? Is it latency/accuracy related or just range? If it’s latency/accuracy related, what is the necessity threshold criteria? Is there information about sensor hardware comparison/selection available? Any personal recommendations?

Thank you for any help

Ben

That power level sounds aggressive on pump gas. You might get there much easier on E85, and if using flex fuel, could stay safe on 93 pump fuel.

As for sensors, sometimes you get what you pay for, and sometimes there are bargains to be had in high-volume OEM parts. But testing and experience will tell you. Normally parts designed for racing will either work at higher temperatures, handle more vibration, or have better connectors.

If you plan ahead and make sure you can switch to the more expensive sensor later (ie, if it requires a 12V power, but the OEM only needs 5V), then either bring an extra 12V lead and don't terminate it, or use an intermediate connector with both 5V and 12V supplies. That way if you need to switch in the future it's easily to do. I call designing and thinking this way "future-ablity".