ACC Simagic Settings: The FFB Detail Trap and How to Fix It

I’m a sim racer and amateur racer with a passion for Motorsport, good racecraft and the technical and setup aspect of sim racing.

If you’ve loaded ACC on a Simagic Alpha for the first time and the wheel feels weirdly buzzy on straights – like there’s a high-frequency drone humming through your hands that has no obvious source – it’s almost certainly FFB Detail. SimPro Manager ships with FFB Detail at default (somewhere around 30), which works fine on AC and iRacing because those sims feed a clean rack signal that benefits from a touch of amplification. ACC is different. ACC’s own Road Effects slider at 100% is already passing through real high-frequency suspension and surface telemetry. Stacking SimPro Manager’s FFB Detail on top creates a doubled-up vibration layer that drowns the actual slip-angle cues you’re trying to feel. The fix is one setting: FFB Detail to 0. Drone gone. Slip information back. Welcome to ACC properly.

The rest of the Simagic-on-ACC setup is genuinely clean. Total Force 100%, the universal DD-on-ACC settings (Min Force 0, Road Effects 100%, Dynamic Damping 60% rather than the Kunos default 100%), and per-base in-game Gain that scales inversely with motor torque. The Alpha Mini is the friendly one. The Alpha U is the brutal one. The Alpha sits comfortably in the middle.

SimPro Manager setup for ACC

The values below assume FFB Detail at zero – that’s the single most important call on this page and it’s worth repeating. Smoothness scales lightly with motor torque: more on the Mini (the smaller motor benefits from a touch of smoothing), less on the Alpha U (the higher torque is already amplifying every micro-event, and over-smoothing flattens it). Mech Friction at 10 adds steady centre weight without numbing peripheral cues. Mech Damper at 15 catches straight-line oscillation on the bigger bases.

Setting	Alpha Mini (10Nm)	Alpha (15Nm)	Alpha U (23Nm)
Max Torque	100	100	100
Smoothness	3	2-3	2
Wheel Return Speed	0	0-5	5
FFB Detail	0	0	0
Mech Friction	5	10	10
Mech Damper	10	15	15

Note Wheel Return Speed at 0-5 (very low) for ACC, which is the opposite of the iRacing call. ACC’s caster trail simulation works fine without an active centring assist, and adding one fights the natural return-to-centre force. If you’ve got a SimPro Manager profile saved for iRacing with Wheel Return Speed at 100, save a separate profile for ACC with it dropped to 0-5. Saves swapping them every time you load a different sim.

In-game ACC settings

Setting	Alpha Mini	Alpha	Alpha U
Gain	65%	45%	30%
Min Force	0%	0%	0%
Dynamic Damping	60%	50%	50%
Road Effects	100%	100%	100%
FFB Frequency	400Hz	400Hz	400Hz

The Gain numbers scale aggressively because Simagic’s torque output at the Alpha U end is real. Alpha U at 30% Gain still delivers ~7Nm of average cornering force, which is plenty for a full GT3 stint. Push past 35% and you’ll be feeling it in your forearms by lap 20.

Why FFB Detail at 0 actually matters

This is worth the deeper paragraph because the reasoning isn’t obvious from the SimPro Manager UI alone.

FFB Detail in SimPro Manager amplifies high-frequency telemetry events – little ripples in the signal that come from the underlying physics. In sims with a relatively clean, low-detail FFB output (older titles, or sims using simpler tyre models), bumping FFB Detail brings out the granular feel of road surface texture and that subtle weight transfer that makes a car feel alive in your hands. It works as intended there.

ACC isn’t that kind of sim. The whole point of ACC’s Road Effects slider at 100% is that ACC is already passing through high-frequency suspension and tyre-surface telemetry directly from its physics. There’s no missing detail to amplify. So when you turn FFB Detail up in SimPro Manager on top, you get an additive layer of vibration that’s not part of the original signal. It manifests as a constant low-level buzz on straights, masks the slip-angle change moment, and generally makes the wheel feel like there’s an irritating tremor running through it. Turn it to 0, the buzz disappears, and the real signal – which has been there all along – finally comes through.

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Common Simagic + ACC mistakes

FFB Detail at default (around 30) in SimPro Manager. The single biggest Simagic-on-ACC mistake. Drone city. Set to 0.
Road Effects at 0% in ACC. The AC carryover. ACC’s Road Effects is real telemetry, not canned. Set to 100%.
Wheel Return Speed above 10. Fights ACC’s caster trail simulation. 0-5 is right for ACC (different from the 100 you’d run on iRacing).
Dynamic Damping at Kunos default (100%). Way too heavy on the higher-torque Alpha bases. Drop to 50-60%.
Gain at 100% on the Alpha U. Severe clipping at heavy corner loads. 30-35% is the upper limit. Watch ACC’s in-game FFB widget go grey rather than red.

Once FFB Detail is at 0, the Simagic-on-ACC experience clicks. The multi-brand ACC matrix is ACC wheel settings, the iRacing Simagic companion is iRacing Simagic settings (which has the inverted Wheel Return Speed call worth knowing), and the wider Simagic lineup is in our Simagic buyer’s guide.

Sources: Simagic official Discord ACC channel, r/Simagic community profiles, r/ACCompetizione Simagic setup threads.