But are they really doing your engine any good? There’s usually a fair bit more power, as well as increased fuel efficiency, available from most standard common-rail engines, and installation is often as simple as plug-’n’-play. This is where performance chips or modules come in. However, the vehicle manufacturers (for a variety of reasons including local fuel quality, varying emissions regulations, etc) tend to tune their engines very conservatively. It’s much more refined than simply squirting the fuel down into the cylinder and hoping for the best. The computer can then tell the injectors when to open, how long to open for (called duration) and how many times to open per combustion cycle. Whereas older mechanical diesel pumps deliver the fuel directly to the cylinder, modern pumps cycle it through an accumulator, or rail, which is directly connected to the injectors. Better economy, more power and way more controllability of the fuel delivery when compared to the mechanical pumps of yesteryear admittedly at the cost of added complexity and reliance on electrics – hey, nothing’s free.įor images, videos and the full Unsealed 4X4 experience, read this in our online magazine. This one is for those folks who have made the realisation that technological advancements can actually be a good thing… specifically, common rail diesel injection.ĭid you know that every diesel 4X4 on the market last year featured some sort of common-rail injection system? The simple reason for this is that they work.

Quick question: Do you miss carburettors and tape deck stereos? If you answered yes, this article probably isn’t for you.

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