JB4 PRO vs FastTrack Rides

Smart phone integration for your JB4 performance tuner to change maps, monitor live engine data, record logs, manage fault codes, update JB4 firmware, and much more! All JB4 systems sold from 2025+ use this new FREE app!

FastTrack is a precision vehicle performance timer and enthusiast community built for track days and closed-course testing. Measure acceleration, rolling speed, and drive sessions with GPS accuracy — then share results, buy and sell parts, join groups, and drive with friends in real time. ACCELERATION TIMING 0-60, 0-100, quarter-mile, and half-mile times with millisecond precision. Automatic accelerometer-based launch detection. Sensor fusion of GPS and high-frequency accelerometer matches dedicated timing hardware within ±0.02 seconds. Strict rest-anchored times or 1-foot rollout (Dragy-style) display. Per-milestone validity keeps a clean 0-60 even if a later split looked off. Downhill runs are detected and excluded from public boards. ROLLING MODE Time rolling-start pulls. Hit 60 mph and the timer starts automatically — capturing 60-130, 60-100, and 100-150 mph with 10 mph splits and peak G-force. DRIVE TRACKING Real-time speed, distance, max/average speeds, and an interactive route map. Background GPS keeps recording when your screen is off. DRIVE WITH FRIENDS Multiplayer sessions joined with a 6-character code. Cruise, race, rolling, or open modes. Friends on a shared live map, real-time stat compare, podium summaries. MARKETPLACE Buy and sell parts with the community. List for sale or post Want-to-Buy. Secure Stripe payments with buyer protection — funds release after delivery confirmation. Browse listings that fit your garage, share in DMs, message sellers directly. GROUPS Communities built around what you drive. Auto-generated by make and model, or create your own — public or private with approval. LEADERBOARD Compare times across every acceleration and rolling category. Your Rank pins your time, position, and gap to #1 at the top of every board. Get notified the moment someone bumps you down. Filter by vehicle type or brand. Pre-validation runs live in their own Legacy section. BUILD OF THE WEEK Featured builds rotate weekly — submitted by users, curated by the team. SOCIAL Posts with up to seven photos or videos, tag friends, reshare. Threaded comments, double-tap to like, mentions. Full-screen Trophy view with PB badges. A unified inbox bundles likes, comments, mentions, friend requests, group invites, and leaderboard movement. MESSAGING Direct messages and group chats. Share posts, runs, drives, vehicles, and listings in conversation. Message requests — let anyone or only friends reach you. VEHICLE GARAGE Save vehicles across nine types — cars, trucks, motorcycles, ATVs, dirt bikes, side-by-sides, snowmobiles, boats, and more. Up to 50 photos per vehicle, mods tracked. Others can like and comment. PROFILE Personal-bests strip across every category. Link to Instagram, YouTube, TikTok, X. Control who sees your PBs — public, friends-only, or hidden. RUN HISTORY Every timed run across Acceleration, Rolling, and Drive tabs with detailed metrics, GPS data, splits, and G-force. PRIVACY AND SAFETY Control who can message you and comment on your vehicles. Mark runs private — they count toward your PBs but stay off public boards. Block and report users or content. Account deletion with a 30-day grace period. FEATURES Dark mode, imperial and metric units, high-accuracy GPS with signal quality indicator, push notifications, referral codes, contextual in-app help, offline mode with cloud sync, and deep link sharing for posts, runs, drives, vehicles, profiles, groups, and listings. SAFETY FastTrack is for closed courses, racetracks, and private roads. Users acknowledge safe-use guidelines before accessing timing features. Never use on public roads. Always follow local laws and drive responsibly. Whether you're at the drag strip, testing a tune, comparing pulls at a track day, driving with friends, hunting a hard-to-find part, or building a community around the cars you love — FastTrack gives you the precision data, the marketplace, and the crew to make it count.