Vacuum

Running a big cam with lots of overlap in your muscle car? Then you probably already know that it significantly reduces the amount of engine vacuum, particularly at idle. Why […]

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 […]