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need help speedo is off

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Old 04-03-12, 04:13 AM
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ND RX7
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ND need help speedo is off

i need help here my speedo in my car is off by 10mph. i think im doing 40 when im only do 30 need some help here.
Old 04-03-12, 08:34 AM
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Did you change tire sizes?
Old 04-03-12, 11:32 AM
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What car?

If not tire size, it could be an internal speedometer problem. This thread in the 2nd gen FAQ has info on fixing that sort of problem.
Old 04-03-12, 06:09 PM
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it has 14s i think i dont know if that came stock on the 88 or not. i dont know a thing about this kind of car
Old 04-04-12, 08:46 AM
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Head up to the 2nd gen FAQ, as it contains tire sizing as well as options and features standard for every model. Maybe spend just a few minutes figuring out what you have so that you can provide some info so that we have a much better chance of being able to answer.

What model is your car? The base model 4 lug came with 14s.
Old 04-04-12, 06:39 PM
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i cant find it in the FAQ's. can throw in the link please
Old 04-05-12, 10:25 AM
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https://www.rx7club.com/showthread.p...07#post6843007

Find out what model you have. Or just look in the driver's side door jamb. It should tell you the stock tire size on a label with the GVWR.
Old 04-05-12, 11:24 AM
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How are you measuring speed?
Old 04-05-12, 06:38 PM
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SE
14x5.5 40ET offset

(Often called "Phone Dial" styled)


measuring speed in mph.
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