NOW WE’RE TORQUING!

Porsche’s patented VarioRam system is an ingenious way to alter geometry of the induction manifold according to engine needs under different operating conditions. Here’s how it works…

Words Shane O’Donoghue

VarioRam is the name Porsche gave to its advanced variable intake system when the technology was first released in 1994. It’s clear, however, from the wealth of Porsche-filed patents in the years leading up to then, the manufacturer’s engineers had long considered the benefits of varying intake geometry. Indeed, the VarioRam system was preceded by a far simpler variable design that didn’t get much recognition, never mind a catchy marketing name. Before we look at how these Porsche systems work, it’s probably worth us going through an overview of intake tuning. This is a massive field of study, obviously, because it includes the whole inlet system, from engine air intake, filter, throttle and then the plenum, manifold and, finally, the inlet valves. Each and every millimetre of this system affects…

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Classic Porsche (Digital) - 1 Issue, October 2024

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