Tuning Tools

Tire Size Calculator

Compare two tire sizes and see diameter, circumference, sidewall height, and percent difference. Tire changes can affect speedometer accuracy, shift timing, and torque calculations.

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Current Tire

New Tire

Use metric tire format: width / aspect ratio / wheel diameter. Example: 275/55R20.

Tire Comparison

MeasurementCurrentNew
Diameter--
Circumference--
Sidewall--
0.0% Difference

A tune update is usually recommended when tire diameter changes enough to affect speedometer accuracy, shift behavior, or ABS/traction assumptions.

JR Jones Racing Tune Files & Cam Kits

Use these tools to confirm your engine, drivetrain, tire size, gear ratio, or RPO codes before ordering. Once you know what you have, JR Jones Racing can help match your vehicle to the correct tune file, camshaft tune, DOD/AFM delete tune, MDS delete tune, or cam kit.

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Connected to the catalog

Carry drivetrain changes into the tune order

Add the measured tire size and final drive ratio in the builder so the information stays attached to the matched tune.

Build Your Tune

Select the vehicle and camshaft, choose the tune type, then add only the modifications supported by that path.

Tuning device required: You must have an HP Tuners MPVI2, MPVI3, or MPVI4, or an EFI Live device supported for your vehicle. JR Jones Racing does not currently support RTD or TDN devices. RTD/TDN support is planned for the future. Check device requirements. Need an interface? You can add an HP Tuners MPVI4 to your tune at the bottom of this builder if you would like to purchase one through JR Jones Racing. Vehicle credits are sold separately.
Build Your Tune Package
Verified Vehicle Match
Choose Your Path Choose Your Tune Type

Full Custom and Base support listed modifications. Downloadable .HPT files cover only an exact supported cam or delete calibration with no modification add-ons.

Modifications & Options
HP Tuners Credits are sold separately at HPTuners.com.
Your Tune Match
Choose year, make, model, engine, and cam selection.
Price Breakdown
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HP Tuners MPVI4 vehicle interface

Need an HP Tuners interface?

Purchase an MPVI4 below to include it in the same order as your tune. Vehicle credits are sold separately.

View MPVI4 Details