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Old Today, 03:38 PM   #1
dowdsy
Regular Member
 
Join Date: Jan 2014
Posts: 60
Default Xygt Replica tacho rdg high with pertronix ignition

My tach reads around 1000 to 1500 on the high side it's been that way since I installed Pertronix and the matching coil. I have tried all the fixes from Pertronix including resistor and diodes inline to tach to reduce the signal. The resistor reduced the signal too much and the tach would not read above 3500 even though the engine was still revving the diodes did nothing. Maybe my tach is bad it's not a repo it's genuine. Does anyone have any ideas before I buy a new one?

Cheers.

Wayne
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Old Today, 03:45 PM   #2
Dr Terry
FF.Com.Au Hardcore
 
Join Date: Jan 2011
Posts: 1,379
Default Re: Xygt Replica tacho rdg high with pertronix ignition

Could it be a 6-cyl GS tacho & you're feeding it with V8 pulses. I'm not familiar with these tachos, do they have a 6/V8 switch on the back of the housing ?

Dr Terry
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Old Today, 03:52 PM   #3
dowdsy
Regular Member
 
Join Date: Jan 2014
Posts: 60
Default Re: Xygt Replica tacho rdg high with pertronix ignition

Not too sure Dr, I think the 6cyl gs falcons had 6000 rpm tach. No switch on the back of these.
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