Morio, Ferrari 126CK, Museo Ferrari, Maranello – CC BY-SA 3.0 via Wikimedia Commons (Credit links at the end of the content)
The chaotic era of F1, especially with the rise of turbo engines in the early 1980s, before that, Lotus already introduced ground-effect aerodynamics, and then Renault pushed turbocharging into the sport, everything was moving too fast, and Ferrari response in 1981 was the Comprex system experiment.
Ferrari was still using its 3.0L flat-12 engine, but by 1981 the team moved to a smaller engine, 1.5L V6 turbo unit. The reason behind it was that the flat-12 was wide and interfered with the venturi tunnels under the car, limiting aerodynamic efficiency, Ferrari switched to a narrower V6 layout, too free space around the chassis and improve airflow under the car, allowing for more effective underbody downforce.
Ferrari Comprex System
So in the early ’80s, we know that F1 was stepping into a new, slightly chaotic era.
Turbocharged engine were the future, everyone could see that…
But there was one problem that kept biting drivers at the worst possible moments; TURBO LAG!
You would press the throttle, wait, and then suddenly the power would arrive all at once, and on tight street circuits, that delay could feel like an eternity.
For the new season in 1981, Ferrari decided to try something else, and it wasn’t a refinement, not a small tweak, but a completely different way of thinking about forced induction.
They called it the Comprex.
What Exactly Was the Comprex?
The partnership of Ferrari with Brown Boveri & Cie, thats from the system came… it was Swiss firm with experience in pressure-wave technology.
Instead of relying on traditional turbochargers, which use exhaust gases to spin a turbine and then compress air; the Comprex took a more direct and almost mechanical approach.
What it really did? So it used pressure waves from exhaust gases to compress incoming air instantly, so the unit itself was belt-driven from the engine, meaning it reacted immediately to throttle input, no waiting for turbines to spool up, no sudden surge of power.
Why Ferrari Took the Risk
Ferrari’s thinking was simple, if turbo lag was the biggest weakness of turbo engines; then removing it could unlock something special.
With the Comprex system, the engine behaved more like a naturally aspirated unit.
Power delivery felt smooth, more predictable… and almost linear.
Drivers could rely on throttle response instead of guessing when the boost would arrive.
There waas also a clear advantage in slower sections, comprex system delivered strong torque, something that was especially useful on street circuits where traction mattered more.
But it wasn’t just a theory either, the numbers looked promising; and the early feedback suggested Ferrari might have found a real breakthrough.
It wasn’t only the Comprex system in 1982, Ferrari also tried their double rear F1 wing loophole, which was banned just after its first race. You can read the story here.
Long Beach 1981: The Only Real Test
The experiment reached its peak at the opening round of the season in 1982, at the United States GP.
Ferrari arrived with two cars; the conventional Ferrari 126CK, powered by turbochargers, and the experimental Ferrari 126CX, fitted with the pressure-wave supercharger.
During free practice, reports suggest, Gilles Villeneuve took the Comprex car out on track, almost immediately, something felt different.
Drivers described the engine as smooth as responsive, more like a larger naturally aspirated engine than a turbocharged one; the hesitation was gone, you pressed the throttle, and the car simply went.
So did Ferrari solved one of the biggest problems at the time?
When Reality Hit Back
But F1 has a way of exposing weakness very quickly, the biggest issue came from something surprisingly simple, the belts driving system.
Under racing conditions, the loads and vibrations were extreme, far beyond what the setup could handle, the rubber belts kept snapping, sometimes without warning.
That alone would have been enough to raise concerns, but it wasn’t the only problem, the comprex unit was bulky, it sat high on the engine, which raised the car’s center gravity, on a tight circuit like Long Beach, that affected balance and handling in ways drivers couldn’t ignore.
It wasn’t as expected, what looked revolutionary in theory was starting to feel fragile in practice.
A Technical Success… That Could Not Race
The comprex system actually delivered on its promises.
The important thing was that the throttle response was almost instant.
Low-end torque improved dramatically, reportedly by a significant margin compared to the turbo setup… power output was competitive, around 550 hp, which was right where it needed to be at the time.
Technically, it worked, but F1 doesn’t reward ideas that only work in perfect conditions, reliability matters, packaging matters, cost matters, and on all three fronts, the Comprex system struggled!
There were also teams in 1982 trying to outsmart the turbo-powered cars, including F1’s water-cooled brakes loophole, which was eventually banned after being discovered. Read the full story here.
The Costs
Ferrari did consider pushing the project forward.
The main issues; especially the inertia and packaging problems, could have been addressed with a smaller and lighter unit… but that came at a price.
Brown Boveri & Cie reportedly requested around 1 million dollars to continue development, a significant sum at the time.
The Italian team had to make a choice; invest heavily in an uncertain concept, or look for something cheaper and more effective, they chose the safer path, while they already had the turbos.
More Interesting Stories:
- Read More: March 2-4-0: F1’s Lost Six-Wheel Experiment
- Read More: Arrows A2: The “Invisible Wing” That Didn’t Work
The Return to Turbos
Before the race at Long Beach, Ferrari decided to abandon the Comprex experiment.
The team reverted to turbochargers; specifically the KKK twin turbo setup, which was proven and far more reliable.
The experimental Comprex system of Ferrari never started a race.
Its moment existed only in practice sessions… but Ferrari didn’t lose direction.
By focusing on refining turbo tech, the result came quickly, Ferrari secured the Constructors Championship in 1982, and repeated the achievement in 1983.
So looking back, the Comprex system feels like one of those classic F1 stories, an idea that was just a little too early, a little too complex, and a little too fragile for its time.
FEATURED IMAGE CREDITS: Morio, Ferrari 126CK, Museo Ferrari, Maranello – CC BY-SA 3.0 via Wikimedia Commons
