Chip Tuning / Software Optimization / Control Unit 9863867080 01: Fiat Topolino 5.5 kWh 8 hp (2022 ->)

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 Fiat Topolino 5.5 kWh 8 HP – more acceleration, more top speed, without opening your control unit. Stage 1 turns 8 HP into a genuine 14 HP and frees up to 80 km/h. Reversible, EVC-certified – and exclusively available worldwide from us via bench access to the sealed control unit.

Why 45 km/h is simply not enough
  • In today's traffic, 45 km/h is often simply too slow.
  • Sluggish acceleration on 50/60/80 routes is frustrating.
  • A queue of cars quickly forms behind you.
  • Others overtake more aggressively – and that compromises safety.
Stage 1 makes your mini-EV faster, more confident, and safer in everyday use – without overdoing it.
Without Opening
We read & write the VCU3000 via bench. The waterproof housing remains closed, and the IP protection is maintained – no risk of destroying your water-sensitive ECU.
Globally Unique
No drilling, no destroyed cover as with other providers. On request, a finished plug-and-play control unit for self-installation.
Reversible
Revert to series production anytime. VMAX freely selectable from 50 to 80 km/h or capped at 50/55/60/65.

What Stage 1 really delivers

Characteristic Standard STAGE 1 Plus
Power 8 HP 14 HP +6 HP (+75%)
Torque 39 Nm 44 Nm +5 Nm
Vmax 45 km/h up to 80 km/h* +35 km/h

You'll notice the extra torque exactly where it matters most – on inclines. Where the standard model struggles uphill, your mini-EV with Stage 1 pulls through cleanly.

Performance Diagram

Stage 1 Series
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 housing. Others drill a hole in the housing and then seal it with plastic. That's exactly where water gets in, and that's exactly what leads to defects in the already water-sensitive ECU. Not with us.

Cleanly done – what we do, what we don't

What we do
  • Safely utilize existing reserves.
  • Cleanly raise torque and power limits.
  • Precisely adjust VMAX to your usage.
  • Keep everything reversible – revert to series anytime.
What we don't do
  • No opening, no drilling on the housing.
  • No generic "internet files".
  • No unsafe extreme values.
  • No technically nonsensical speed targets.

Your Options

  • Software on your ECU: You send in your control unit – we process it on the same day and send it back.
  • Plug-and-play control unit: Pre-programmed (Stage 1 + VMAX), in stock, same-day shipping. Old one out, new one in, drive off.
  • 1:1 Clone Service: We clone your VCU3000 to a spare unit, fully functional – no one else can do this.
  • Individual VMAX: Top speed capped lower if desired – e.g., for more range.
Top speed & Battery temperature
Full VMAX is a matter of battery temperature – pure physics, not software. Full power is available from approx. 15 °C. When 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 will deliver.

Range, Consumption & Reliability

Range & Consumption
With normal driving, consumption remains practically the same – you even drive more relaxed because you're no longer constantly at 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 – without special tools. With 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 usage.
Can I revert to standard?
Yes, the optimization is reversible. We can flash back to the original state at any time.
Can the speed be switched at the push of a button?
Currently not. Many ask this – a clean switch by button is currently not technically possible with these control units.
What about the warranty?
As with any optimization, we cannot rule out a possible loss of warranty. However, since everything is reversible, the original condition can be restored at any time.

*Please specify the year of manufacture before purchase so we can guarantee the correct adjustment. The optimization is exclusively intended for closed, non-public traffic or racing events; it will void the operating license.