Polaris supercharger kits with the Preload plan come home on the stock tune. Once the kit is on, you write the Packard supercharger tune yourself with the HP Tuners RTD and the TDN app. Here’s the setup, the read, the write and the fixes for what goes wrong.
Watch it
From the Packard Xpedition install video. Tap a chapter to jump.
Before you start
Set up, read, write
Check each one off as you go; this page remembers where you are on this device.
Once per phone and device.
Nothing below works until your ECU has been unlocked through HP Tuners. That happens when you send it in, and you get an email with the information you need.
If you picked Flash now, the supercharger tune is already written and you don’t need this guide to ride. Keep it for data logs and diagnostics.
Install HP Tuners’ TDN app on your phone and create your account with your email and details.
The app asks you to link a tuner. Tap Link Tuner and enter the invite code printed on the instructions sheet in your kit. When it’s done, you’ll see Linked tuners: Jace Packard.
Plug the comms cable into the purple adapter under the dash, then plug the RTD into the cable. Wait for the green status light.
Your instructions sheet has you sync the device’s credits: Tools, then Sync RTD+ Credits. The first flash on a vehicle needs them.
Turn the key to accessory, so the dash and screen come on with the engine off. Tap Read/Write at the bottom right, then Read Vehicle. Let it run, and wait for the confirmation that the read file went through.
After the read you’ll see Unknown vehicle with your bin number. Tap Sync Files; that’s what sends your read to us. We send your tune back to the app.
Tune not showing up after you sync? Tell us your file is synced with your order number.
While it writes, don’t start the engine, turn the key off or unplug anything. Keep your phone next to the RTD and on a solid connection, and start with a charged machine battery and a charged phone.
Once the app says it’s complete, you’re on the supercharger tune. Start it up.
If it won’t flash
What the shop sees most, and what solves it.
Open Settings, then Firmware Tools, and update both the RTD Gen 3 firmware and the Gen 3 Bluetooth firmware (on a Gen 4, update those). That solves most read and write failures.
Unplug the comms cable, turn the machine off, and let the RTD and the machine sit for about five minutes. Plug back in and try again.
An old copy of the app is a common cause. Check the App Store or Google Play for a TDN update.
Three bars of data usually isn’t enough. Use Wi-Fi or full-strength data; at camp, Starlink or any Wi-Fi you can get on.
Key to accessory, then follow Data Logging in the app. It uploads a log to us so we can check the MAP sensor, injectors and tune are all reading in spec, and tell you what’s going on.
The Diagnostics tab at the bottom of the app reads the codes and tells you what they are.
Questions
Polaris supercharger kits that include the tune on the Preload plan, Pro R and Xpedition. Complete kits include the HP Tuners RTD; a Base kit needs one added to the order to Preload.
Not to ride. The shop already wrote the supercharger tune. The RTD and app are still handy for data logs and reading codes.
On the instructions sheet that comes with your kit. If you can’t find it, ask the shop.
Don’t. The supercharger tune won’t run right without the supercharger. Install first, then write.
Don’t start it, and contact the shop before you do anything else. Tell us what the app showed when it stopped.
Send us your order number, your vehicle and what the app says. The shop answers by email.