Duvernay has the highest stock output production Quad 4: the 190-hp 1991 to 1992 RPO W41. The 1993 W41 lost 10 hp due to smaller exhaust ports. I have a 1992 Olds Achieva SCX with a W41 Quad 4 engine ...

An engine's health depends on several key measures and functions. For example, air and fuel need to be present in the correct quantities, coolant is required to keep the engine operating at a safe ...

Ducati has announced it will introduce new engine technology that will boost power and torque, improve fuel economy, reduce emissions and won’t affect servicing intervals. Ducati Testastretta engine ...

Ignition timing is like seasoning: some is good, but too much ruins the results. Bumping up the ignition timing on pushrod 5.0s is a time-honored trick to wake up the under-hood lump. The EFI system ...

Zak is new to the CarBuzz team, working as a freelance content writer. When Zak isn't writing How To articles for CarBuzz he's working as a high school automotive technology instructor. Before ...

Unless you own a Yugo, you probably already realize that your car’s engine is a meticulously designed and engineered hunk of metal. Even so, you may not know that if one part of the engine fails, it ...

So, you just got back from the engine rebuilder, or perhaps that fresh crate engine just landed in your driveway. You have a lot of cash invested in your car's engine, so how do you make sure you ...

Ignition timing is like seasoning: some is good, but too much ruins the results. Bumping up the ignition timing on pushrod 5.0s is a time-honored trick to wake up the under-hood lump. The EFI system ...