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                 bigt80 
                 
                
                United Kingdom 
                1052 Posts  | 
                
                  
                    
                      
                       Posted - 27 Aug 2016 :  14:39:35
                        
                        
                      
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                       I'm guessing you have a Series IV as earlier cars had a mechanical rev counter, so it did not matter. I would say you need a rev counter from a Ser V as these were neg earth, if I remember correctly from another thread that our well informed member 'pruyter' advised on. I guess a + earth rev counter could be changed, but may not be cost effective? I'm sure there will be other more knowledgeable responses too! Cheers. G. | 
                     
                    
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                 Rusttom 
                 
                
                United Kingdom 
                15 Posts  | 
                
                  
                    
                      
                       Posted - 26 Aug 2016 :  20:17:31
                        
                        
                      
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                       Hi there, Just looking into converting the Rapier to negative earth so I can fit an alternator. The rev counter says positive earth only, what do I need to do to allow me to switch it? I have switched it on a car before but it wasnt as advanced as the Rapier! 
  Many thanks, Tom | 
                     
                   
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