06/11/2026
Ken Bjønnes at Palm Beach Dyno tuning this 2023 Explorer ST on HPT to a nice 558whp / 569lbft on E85. This car features our XDI-EVO HPFP (not the big 60 !!) and our XDI+60% injectors. And that car is on stock downpipes and catalytic converter still !
Big news for the Explorer ST platform.
Brian’s 2023 Explorer ST is now officially E85 upgraded and the results speak for themselves. On the dyno, this setup put down 558.64 horsepower and 568.98 lb-ft of torque on our Dynojet.
What makes this combo especially impressive is how complete and refined it is.
This Explorer features:
Xtreme-DI LLC High Pressure Fuel Pump
XDI 60% Injectors
AFE Cold Air Intake
Whipple Superchargers Intercooler
Thermal 2.5” Catback
Palm Beach Dyno custom E85 calibration
One very important detail here: this Explorer is still running stock downpipes and factory cats.
That’s worth pointing out because at this power level, many would expect upgraded downpipes and a more aggressive exhaust combination. Instead, this setup shows just how capable the platform can be with the right fueling, the right supporting parts, and a properly dialed-in calibration.
The dyno graph shows a great overall power curve, with peak torque coming in at 4,510 rpm and peak horsepower at 5,770 rpm. It’s a strong, usable setup that carries power well and makes the truck feel as good on the street as it does on the dyno.
We also configured this Explorer with different boost levels based on drive mode, giving it a very versatile personality depending on how Brian wants to use it. It’s about as close to a perfect street setup as you can get.
That said, we do want to be clear: we do not recommend this power level on a stock transmission. The next step for this Explorer will be an RSA transmission so the drivetrain matches the capability of the engine package.
This is a great example of what the Explorer ST platform is capable of when everything comes together the right way.
558.64 HP / 568.98 TQ
Stock downpipes and cats
E85
Drive-mode based boost control
RSA transmission coming next
Congrats to Brian on an awesome build.