iRacing Simagic Settings: Alpha Mini, Alpha & Alpha U

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

The key Simagic-iRacing distinction worth flagging upfront: Wheel Return Speed stays at 100 on iRacing – not 0 like AC. iRacing’s caster trail simulation works fine with the assist on, and turning it off makes the wheel feel sluggish to centre. Total Force 100% in SimPro Manager, in-game Wheel Force matches your base’s actual Nm (10 for Mini, 15 for Alpha, 23 for Alpha U), Linear Mode ticked, Min Force 0%. The rest is small calibrations.

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SimPro Manager setup | In-game iRacing | Why Wheel Return Speed differs | Common mistakes

SimPro Manager setup for iRacing

Simagic on iRacing wants conservative SimPro Manager values. Smoothness drops as the base torque rises – the Alpha U at 23Nm gets too rubbery if you over-smooth, while the Alpha Mini at 10Nm benefits from a bit more. Mech Friction 10-15 gives a touch of physical mass without numbing the signal.

Setting	Alpha Mini (10Nm)	Alpha (15Nm)	Alpha U (23Nm)
Total Force	100	100	100
Smoothness	2-3	1-2	0-1
Wheel Return Speed	100	100	100
Mech Friction	10	10-15	10-15
Mech Damper	5	10	10-15
Mech Inertia	0	0-5	5
Suspension / Road / Effects	0	0	0

In-game iRacing settings

The in-game side is pure iRacing universal-rules: Wheel Force matches your base’s Nm output, Damping 0, Min Force 0 (DD), Linear Mode ticked, Max Force via the Auto button per car.

Setting	Alpha Mini	Alpha	Alpha U
Wheel Force	10 Nm	15 Nm	23 Nm
Damping	0%	0%	0%
Min Force	0%	0%	0%
Use Linear Mode	Yes	Yes	Yes
Max Force GT3 (Auto)	~35-40 Nm	~45-50 Nm	~50-55 Nm

Why Wheel Return Speed differs from AC

If you’ve come from Assetto Corsa with the same Simagic base, the temptation is to leave Wheel Return Speed at 0 on iRacing. Don’t. AC and iRacing handle caster trail and steering centring differently – AC uses pure rack physics, so an active return-spring assist fights the tyre signal. iRacing’s FFB is also rack-derived but the simulation expects a return-to-centre assist to be active, and the centring feels sluggish without it. Set to 100 on every iRacing session, leave alone.

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Common Simagic + iRacing mistakes

Wheel Return Speed at 0. Carrying over the AC setting. The iRacing centring feels heavy and slow. Set to 100 in SimPro Manager.
Wheel Force not matching base Nm. Mini = 10, Alpha = 15, Alpha U = 23. Mismatch = clipping or hollow feedback.
Linear Mode unticked. You want raw 1:1 telemetry on DD. Always ticked.
Min Force above 0. Robotic centre rattle. 0% always on DD.
Smoothness above 4 on the Alpha U. Over-smoothing on a high-torque base mutes the slip-angle signal. Drop to 0-1.
Never hitting Auto on a new car. Max Force is per-car telemetry. Map a button, drive a clean lap, hit Auto.

Get Wheel Return Speed right (different from AC) and Wheel Force matched to your base and the rest is per-car Max Force calibration via Auto. The multi-brand iRacing matrix is iRacing FFB settings, the wider FFB hub is the direct drive wheel settings guide, and if you’re still shopping for a Simagic base see our Simagic buyer’s guide.

Sources: Simagic official Discord iRacing channel, r/Simagic community profiles, Boosted Media Alpha series reviews.