If you build engines, tune cars, or even just like mashing your foot on the throttle with conviction, you’ve probably heard ...

For any engine to reach its maximum potential, the fuel must burn efficiently. Running rich or lean is not good for performance, and in extreme cases it can be catastrophic. A rich engine is likely to ...

This is the basic Gunson CO tester. The 12-volt connections power the unit while the pulse pump draws exhaust gas into the analyzer. The unit is designed to measure CO exhaust percentages. Those ...

Usually you'll only modify your engine's computer to achieve higher engine output, but with recent gas prices it's worth looking at your ECU to see what kind of gains in economy you can get. Since the ...