Chip tuning / software optimization: Citroën Ami 5.5 kWh 8 HP (2020 ->)

By Stefanel Performance
999,99 €
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Legal Notice

It is expressly stated that the parts or equipment offered here are manufactured exclusively for racing vehicles. There is no road approval, authorization or authority within the meaning of Article 55 of Regulation (EU) 2018/858, to whose provisions reference is made. Parts or equipment as defined in Annex VI to Regulation (EU) 2018/858, which are used both in racing and on the road, may only be placed on the market for vehicles intended for use on public roads if they meet the requirements set out in the delegated acts referred to in paragraph 3 of this article and have been authorized by the Commission. Parts or equipment that may pose a serious risk to the proper functioning of systems that are essential to the safety of the vehicle or to its environmental compatibility may not be placed on the market or put into service. By confirming, you expressly declare that you have taken note of these instructions, restrictions and prohibitions. Upon receipt of the parts or equipment, you assume full liability. *
information on product safety

Manufacturer/EU Responsible Person

company name
Vizantin Trade UG (limited liability)

address
Jägerkampstraße 23, Kolbermoor, 83059, DE

e-mail
info@stefanel-performance.com
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Get more out of your Citroën Ami 5.5 kWh 8 hp – more acceleration, higher top speed, without opening your control unit. Stage 1 turns 8 hp into a genuine 14 hp and unlocks up to 80 km/h. Reversible, EVC-certified – and exclusively available worldwide via bench access to the sealed control unit.

Why 45 km/h is simply too slow
  • In today's traffic, 45 km/h is often simply too slow.
  • Sluggish acceleration on 50/60/80 km/h roads is frustrating.
  • A queue of cars quickly forms behind you.
  • Others overtake more aggressively – and that compromises safety.
Stage 1 makes your compact EV faster, more composed, and safer in everyday use – without overdoing it.
Without Opening
We read & write the VCU3000 via bench. The waterproof casing remains closed, maintaining IP protection – no risk of damaging your water-sensitive ECU.
Globally Unique
No drilling, no damaged cover like with other providers. On request, a ready-to-install plug-and-play control unit for self-installation.
Reversible
Return to stock at any time. VMAX freely selectable from 50 to 80 km/h or capped at 50/55/60/65.

What Stage 1 really delivers

Characteristic Stock STAGE 1 Plus
Power 8 hp 14 hp +6 hp (+75%)
Torque 39 Nm 44 Nm +5 Nm
Top Speed 45 km/h up to 80 km/h* +35 km/h

You'll notice the increased torque exactly where it matters – on inclines. Where the stock version struggles on hills, your compact EV with Stage 1 pulls through smoothly.

Performance Diagram

Stage 1 Stock
VT Dyno | 6/3/2023

Our Method – No Opening, No Drilling

We were the first to develop the bench protocol for these control units: reading and rewriting on the closed device – without opening or drilling into the waterproof casing. Others drill a hole in the casing and then seal it with plastic. That's exactly where water gets in, leading to defects in the already water-sensitive ECU. Not with us.

Clean Work – What We Do, What We Don't

What We Do
  • Safely utilize existing reserves.
  • Cleanly increase torque and power limits.
  • Set the VMAX precisely for your use.
  • Keep everything reversible – return to stock at any time.
What We Don't Do
  • No opening, no drilling into the casing.
  • No generic "internet files."
  • No unsafe extreme values.
  • No technically unreasonable speed targets.

Your Options

  • Software on your ECU: You send in your control unit – we process it the same day and send it back.
  • Plug-and-play control unit: Pre-programmed (Stage 1 + VMAX), in stock, shipped the same day. Old one out, new one in, drive off.
  • 1:1 Clone Service: We clone your VCU3000 to a functional spare unit – something no one else can do.
  • Individual VMAX: Top speed capped lower if desired – e.g., for more range.
Top Speed & Battery Temperature
The full VMAX depends on battery temperature – pure physics, not software. Full power is available at approx. 15°C. When it's cold, you'll start a bit slower, but once the battery is warm, you'll get the full 80 km/h. Warm up briefly – then your vehicle delivers.

Range, Consumption & Reliability

Range & Consumption
With normal driving, consumption remains practically the same – you even drive more relaxed because you're no longer constantly pushing it to the limit. Those who drive at full throttle continuously will use more power and have less range – as with any EV.
Reliability
We stay within safe limits for the motor, controller, and battery. No extreme settings that overload components – instead, a result of factory quality.

Frequently Asked Questions

Does the control unit need to be removed?
With the plug-and-play device, you remove your old control unit yourself and install ours – no special tools required. For the software variant, you send in your control unit and get your own optimized one back.
Can I choose any VMAX?
Yes. Freely up to 80 km/h or capped in 5 km/h increments (50/55/60/65 km/h) – depending on your use.
Can I revert to stock?
Yes, the optimization is reversible. We can flash back to the original state at any time.
Can the speed be switched at the touch of a button?
Not currently. Many ask this – a clean switch via button is not technically possible with these control units at present.
What about the warranty?
As with any optimization, we cannot rule out a potential loss of warranty. However, since everything is reversible, the original condition can be restored at any time.

*Please specify the year of manufacture before purchasing to ensure correct adaptation. The optimization is intended exclusively for closed, non-public traffic or racing events; it will void the operating permit.