Taking an engine compression test is sort of like checking your car's blood pressure. It's a quick and painless procedure that can reveal hidden issues.

An engine's displacement dictates power output based on the bore and stroke, while compression ratio influences how strong ...

With every passing day the Mule provides opportunities beyond our original expectations. Since the 467ci engine belongs to HPP editor Tom DeMauro, it is at our beck and call. This affords HPP the ...

Increasing an engine’s compression ratio is a proven way of unlocking extra horsepower, but there’s a point of diminishing returns. The team at Garage 54, the Russian mechanics who built a V16 using ...

Compression in a diesel engine is essential for effective and efficient performance. And when compression is lacking, damage can result. That is why it’s imperative to know whether your engine’s ...

Can stuck piston rings be restored without teardown? A 500,000-mile Valvoline engine test shows how deposit removal may ...

As you may know, an engine's compression ratio is directly linked to its combustion efficiency. All else being equal, higher-compression engines tend to make more power while offering better fuel ...

We may receive a commission on purchases made from links. I have been working on my own vehicles for almost 40 years and in that time have accumulated a sizable collection of tools. The bulk of them ...

Test compression technology was invented to address the problem of escalating test-pattern size. Compression allows more test vectors to be applied to an IC in a shorter time and with fewer tester ...

We put both engines on the dyno to see which made more horsepower and torque. It didn’t go as planned. Over the past year, we assembled two very mild small-blocks aimed at the typical hot-rodder ...

When comparing engine specs for nearly any combustion engine automobile, we see a number of variations available with differing outputs of horsepower and torque. We often have a choice of gasoline or ...