SAAB Tuning

Saab 9-3: Water-Alcohol Injection Project

water-injection in turbo Saab

People will do anything to improve the performance of their cars; will add a new turbo, a new spoiler, will do the remapping, and so on…

One of the things that is often applied to improve the performance is water injection (Water-alcohol or Water-athanol).

Water-pump in Saab 9-3 Sportcombi Trunk
Water-pump in Saab 9-3 Sportcombi Trunk

Why inject Water into turbocharger’s face? There are different opinions, if before the turbo then by the time it gets to the intake manifold it has lost most of its cooling effect along the way, But others say that, Depending on the engine, improvements in power and fuel efficiency can also be obtained solely by injecting water;  then, Water/meth has a few benefits, it’s a chemical intercooler, cools aircharge, cleans intake valves , cleans combustion chamber, raises octane of ur air fuel mixture, cools combustion, and dissipates heat quickly after combustion as alcohol absorbs heat….

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Saab 9-3 engine compartment / water-alcohol inejction
Saab 9-3 engine compartment / water-alcohol inejction

One owner of Saab 9-3 SportCombi from Taipei (Taiwan) incorporated into his Saab system for water-alcohol injection. As you can see in the pictures, the system is very simple: A reservoir in Saab 9-3 Trunk holds water or a mixture of water and alcohol or water and methanol. Connected to the reservoir is a water pump.

water-injection in turbo Saab

A pressure switch sees a certain psi of boost from your engine, and (once activated) sends power to the water solenoid and pump. The pump then sucks the water alcohol mixture from the reservoir and injects it into the airstream via a spray nozzle attached before the throttle body. It sprays a fine mist (far too fine to hydrolock an engine) that gets sucked into the cylinder. In there, the heat turns the liquid into a gas (steam), in the process absorbing a lot of combustion heat.

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The production of more power by a water/methanol-injected engine is not a product of the water/meth mixture alone. You must tune to get the most out of it. And interesting, this is old-school tech that trickled down from supercharged piston aircraft during World War II.

Goran Aničić
the authorGoran Aničić
For over 10 years, Goran Aničić has been passionately focused on Saab automobiles and everything related to them. His initial encounter with Saab cars took place back in 2003 when the first Saab 9-3 and sedan version were introduced. At that moment, he was captivated by the car's Scandinavian design logic and top-notch engineering, and everything that followed stemmed from that first encounter. Later on, through his work at the editorial team of the Serbian automotive magazines "Autostart" and later "AutoBild," he had the opportunity to engage more closely with Saab vehicles. In 2008, he tested the latest Saab cars of that time, such as the Saab 9-3 TTiD Aero and Saab 9-3 Turbo X. In 2010, as the sole blogger from the region, he participated in the Saab 9-5ng presentation in Trollhättan, Sweden. Alongside journalists from around the world, he got a firsthand experience of the pinnacle of technological offerings from Saab at that time. Currently, Goran owns two Saabs: a 2008 Saab 9-3 Vector Sportcombi with a manual transmission, and a Saab 9-3 Aero Griffin Sport Sedan from the last generation, which rolled off the production line in Trollhättan in December 2011.

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