I was under the impression 12v were all mechanical. Timing,injectors,turbos I know can up the horsepower.Don't bite. Lots of snake oil out there.
A friend of mine recently bought a '97 12V that had a "tuner" on it. I looked it up online and found that they claimed increased power and fuel economy. It was wired into the intake air temp sensor.........
I was under the impression 12v were all mechanical. Timing,injectors,turbos I know can up the horsepower.