Reply to "Speedometer Accuracy"

bosswrenchMember

As you already found, your short wide tires are too small in diameter. From the tire sizes, you must either own a GT5 or GT5-S, or a converted car to those specs. You need a tire that is 26-1/2 to 27" tall for your speedo and odometer to work properly. Trouble is, there are NO new tires of any diameter that fit your wheels, either front or rear, with V or Z speed ratings. So your best bet is to go to a speedometer repair shop, or one that advertizes speedo calibrations and have them build a small adapter gearbox that sits between the ZF right-angle adapter and the cable. This is done all the time for police cars to calibrate their speedometers as a legal requirement to 'clock' cars for speed enforcement. Just be VERY sure that when the adapter-gearbox is attached, they don't pull the 8mm bolt near the right-angle adapter. Incautious removal of that bolt will cause the speedo gear to drop into your transmission guts, with disasterous results! Rebuilt ZFs are currently around $5500!

5/17/023:49 PM

<ul id="{%=id%}ButtonGroup" class="button-group h-popup-buttons even-button-group even-1">
    <li id="{%=id%}Okay_buttonContainer"><a id="{%=id%}Okay" href="javascript:void(0);" class="button success no-margin-bottom h-alert-modal-ok-button" role="button">OK</a><script type="text/javascript">
        (function() {
            function {%=id%}Okay_click(event, data) {
            {%=id%}Popup.hide();
        }
        
                $('#{%=id%}Okay').on('click', {%=id%}Okay_click);
        })();
    </script></li></ul><a href="javascript:void(0);" class="close-reveal-modal" aria-label="Close Modal">&#215;</a><div class="last-modal-focus focus-utility-element" tabindex="0"></div>
</div>
<script type="text/javascript">
        (function() {
            {%=id%}Popup = new SS.Popup.ModalPopup('{%=id%}');
        })();
    </script>

Skip to main content

Membership Required

Remove From Your Block List

Manage Follow Preferences

Block

Please wait...