Vacuum

Aftermarket camshafts can add significant power to an engine when properly matched with other parts. But remember, the camshaft grind doesn’t just determine engine rpm operating range, it affects peak […]

Can you give me a short explanation of what inches of mercury is and how it is measures manifold vacuum? I just don’t understand it. Thanks! J.J. This can sometimes […]

Your car or truck relies on engine vacuum for a lot of applications, on things ranging from HVAC doors and pop-up headlights to critical vehicle systems like your power brakes […]