Quote:
Originally Posted by bestwheelbase
For some it is the other way around. The digital speedometer is redundant because the car has a needle.
Losing the needle means losing peripheral reference to speed. Instead of glancing at needle location you must look exactly at the value of a number. Difference between a watch with hands and a digital clock. Not everything needs to be digital.
Consider, instead, that it would be easier to incorporate these readouts into the existing LCD. This would alleviate the "replacement cluster" indicator because you're just reprogramming the existing LCD display. Add sensors, let the driver cycle between readouts by pressing the turn signal stalk (or something like that), and set warnings as they wish. Then the driver can select which readout to monitor, and if they reach - for example - excessive oil temperature, then the LCD would automatically go to that readout and flash to indicate the problem.
TRD could sell this as a full kit. Sensors, reprogramming (or aux control box), and something fun like a tachometer overlay that has yellow and orange markings and the TRD logo. 
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I totally get your point, just that I would rather have the needles indicating the oil temp so I have a physical reference to these parameters.
When I am racing, I never really look at the speedometer much as dynamic reference for the actual speed is through my outward vision and noises as well as physical limits approaching through the tactility of the car. A needle oil temp and pressure with blinking warning might be nice.
I do however assume that reprogramming the window is much easier and cheaper for the makers, rather than to make a new mechanical piece as you say.