coza Posted April 23, 2012 Share Posted April 23, 2012 Hi, my clock doesnt work , thinking of removing it and putting a guage there i seen another N/A supra who putg a vacuum guage there, not much of a mechanic but what does that tell you ?? seen the guage on ebay it has 0 - 30 IN-Hg dont know what it means, cheers. Link to comment Share on other sites More sharing options...
Digsy Posted April 23, 2012 Share Posted April 23, 2012 Its a measure of how much load the engine is under. The closer to atmospheric it is, the wider the throttle is open. Old BMWs used to use something similar as an "economy" gauge. Link to comment Share on other sites More sharing options...
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