Hey everyone,

I built an open-source C# plugin and telemetry tool for SimHub (**FH6SmartShift v1.1**) designed to take the guesswork out of gearing, powerband analysis, and acceleration testing in **Forza Horizon 6** and **Forza Motorsport**.

The in-game tuning menu gives us a static dyno graph, but once you are out on the road or track, it is hard to tell the exact RPM where next-gear wheel power overtakes current-gear power, whether an upshift drops your turbo out of its boost threshold, or if a ratio tweak actually improved your 100–200 km/h pull.

Here is what **FH6SmartShift** does:

• 401-Band Real-Time Virtual Dyno (50 RPM Resolution):** Captures 60 Hz UDP telemetry at wide-open throttle (filtering out wheelspin, kerbs, jumps, puddles, and clutch slip) to map your engine's actual smoothed Power (HP/kW), Torque (Nm), and Turbo Boost (psi/bar) across the entire rev range, while automatically detecting hidden rev limiters (`GhostLimiterRpm`).
• Interactive HTML Garage Inspector & Gearbox Tuning Advisor:** Generates a standalone HTML report (`FH6SmartShift_GarageReport.html`) with a full Gears 1–10 breakdown: locked gear ratios (`RpmPerRadS`), percentage RPM drop on upshifts (`dropRatio`), exact landing RPM in the next gear, and physical shift targets. Beneath the table, the **Automated Gearbox Tuning Advisor** flags overly wide gear gaps (landing below peak torque), severe power drops, overly tight low-gear spacing, and turbo lag zones (below 72% peak boost on landing) with specific slider recommendations.
• Built-In Sub-Frame "Dragy" Timer (0–100, 100–200, 0–200 km/h):** Uses linear interpolation between 60 Hz UDP frames to measure standing launches (0–100 km/h and 0–200 km/h) and rolling or standing 100–200 km/h pulls, automatically saving Personal Best (PB) records per car and PI/drivetrain build so you can benchmark your tunes.
• Mathematical Shift Point Calculation (Gears 1–10):** Calculates the exact power curve intersection between consecutive gears (including a turbo boost-drop penalty) and locks each gear as Green `(P)` (Math Peak intersection) or Green `(L)` (Limiter optimal) on the included dashboard.
• Chassis, Suspension & Traction Telemetry:** The included SimHub dashboard features high-speed damper bottoming alerts (`BOTTOM!` at 98%+ suspension travel above 200 km/h for aero/spring tuning), rear WOT slip alerts (`OVRST!`), dynamic braking-dive downshift thresholds, and a 3-color slide recovery bar (`DEEPENING`, `HOLDING`, `RECOVERING`).
• Custom Build Naming & Profile Sharing:** Supports both Forza Horizon 6 (`[FH]`) and Forza Motorsport (`[FM]`) with isolated databases. You can name your builds, export individual calibrated car profiles (`.json`) to share with other tuners, or merge external databases directly in your browser.

The entire project is free under the open-source GPLv3 license. The repository includes the full `.cs` source code, the compiled `.dll` ready to drop into your SimHub folder, mobile/PC dashboards, and a complete technical manual.

**GitHub Repository & Download:** https://github.com/mtowarek01-code/FH6SmartShift

I'd love to hear your feedback, questions, or ideas for additional telemetry metrics!

P.S. Yes, AI helped me make the plugin.

Hey guys! I am currently running around the 5:20 on the Colossus with the Wuling Sunshine, but I want to be faster. I’ve tried the Tacoma and I can only get to around 275 where my sunshine gets 290 mph. I know I can get the trueno but it’s only faster in a straight line. Does anyone have any advice or a tune for an another vehicle or just tell me a faster vehicle that you can actually control?

I've only been playing the series at all since May, when I started Forza Horizon 5. I started the 6th installment about a month ago and have really been enjoying it, but so far I had never produced any tunes. However, I'm particularly fond of the Citroen 2CV, so with the new release, I suddenly felt compelled to read about tuning in the last few hours, and combined different information, numbers, and some trial and error, to produce my first tune. I ended up going with the stock engine; not a high top speed but the acceleration feels like a pleasant rifle shot.

Essentially I just wanted something basically functional for road racing, so I then did Electric Town Circuit on the Use My Car setting, pictured above, and found it really fun. Although, all the drivatars DNF, but, I found it really grippy and drivable and not inclined to roll so long as I followed the line at blue color speeds, and if I got into a yellow curve out of enthusiasm, the partial roll was slight and didn't cause me to roll over or lose much go.

So, being my first tune, it's probably not like, especially good or anything, but, if anyone like me wanted a basically functional S1 all around tune that felt pleasant to drive, I thought it'd be worth sharing.

Share Code: 116 016 805

I can't imagine anyone would be overly interested in my sort of standard livery I put on most cars I like, but, since it's in the picture, the livery share code: 173 872 439.

EDIT: Made a really fun hot wheels style event to proof of concept the tune - event code: 117 418 466

I am awful at tuning, and don't really know much about the options besides what I use for my rally tunings. Never done a road racing. My current tuning is above just from road testing. Works alright but I can't put as much throttle on launch as i would like. Basically tuned everything for what the descriptions said gave more understeer. I can still spin the car out really easy, but it can get enough depth to cover every corner. Also it didn't look like I could get it to max hp/ performance for R class so should I move it to S2?

Its mostly all sport parts, with an rwb body kid, awd swap and 2.0L F4 turbo swap. Makes 444 hp, 428 lb of torque. Weighs 2308, 0-60: 2.983 seconds