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Message: <blockquote data-quote="ALBundy" data-source="post: 489773" data-attributes="member: 15">To me it's not a temporary solution but rather a cheaper solution to better acceleration. To have better acceleration, you need higher torque. To get higher torque at the engine is not cheap. Bigger displacement or higher compression ratio requires new engine internals. As for engine remapping, most of the time the power band is shifted to the right, with little gains in torque. Now the rear differential acts as a torque multiplier. You can basically increase the amount of torque delivered to the wheels by using a shorter ratio, ie; from 3.64 to 3.91 which gives you about 7.4% increase in torque!! The downside is the your range is also reduced but as I said earlier our cars are over geared and the key here is to ensure you have sufficient gearing to hit top speed.</blockquote>