Whoracle Posted October 28, 2009 Report Share Posted October 28, 2009 so i hooked up my new gauge cluster this morning (except for the tach, have to figure how to wire that in). Took it for a test drive and saw that i finally had a working speedo, but it is incredibly inaccurate. Driving on the freeway to get to school it was saying 95-115mph or so (i would estimate at 90-95 i was going ~65-70 and 110+ i was probably going 70-80). Now at first i thought it was mainly because of non stock wheel size (195/55r14 instead of the 175/80r13 that came stock), but i dont think that would account for a 30mph difference, even at low speeds (25-30mph it reads like 45-50mph). Anyone have any advice? Quote Link to comment
NorCalDime Posted October 28, 2009 Report Share Posted October 28, 2009 so i hooked up my new gauge cluster this morning (except for the tach, have to figure how to wire that in). Took it for a test drive and saw that i finally had a working speedo, but it is incredibly inaccurate. Driving on the freeway to get to school it was saying 95-115mph or so (i would estimate at 90-95 i was going ~65-70 and 110+ i was probably going 70-80). Now at first i thought it was mainly because of non stock wheel size (195/55r14 instead of the 175/80r13 that came stock), but i dont think that would account for a 30mph difference, even at low speeds (25-30mph it reads like 45-50mph). Anyone have any advice? probably have diff gears in rear end? Quote Link to comment
Whoracle Posted October 28, 2009 Author Report Share Posted October 28, 2009 thats possible, but i didnt change the gears, and i dont think the previous owner did. ill have to dig through my receipts and see if i can find anything. I went past a speed limit sign that tells you your current speed, and it looks like under 30mph true speed, the indicated speed is 5mph more (so, 20 true = 25 indicated) but then the deviation gets greater with speed. using an app on my iphone, apparently 85-90 indicated is 60mph true, but who knows if the app is working correctly. Quote Link to comment
danfiveten Posted October 28, 2009 Report Share Posted October 28, 2009 Mines inaccurate by about 10 - 15 mph Quote Link to comment
Cuts metal like mad Posted October 29, 2009 Report Share Posted October 29, 2009 The speedo drive gear in the tranny has to be WAY off. Theres multiple "sizes" that nissans offers. Compounded by the tire size. Quote Link to comment
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