NoPistons -Mazda Rx7 & Rx8 Rotary Forum

2nd Generation Specific 1986-1992 Discussion

Tach question

   
Old Sep 28, 2006 | 09:05 PM
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Is there a way i can re-cal my new tach i got for a rotary engine??? i know that you can re-cal the rotary tach for a v8..
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Old Sep 29, 2006 | 06:57 PM
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rotary = 4 cylinder



the easy easy way is to plug the tach into the factory test plug, theres a female bullet connector on the trailing coil harness, by the brake master cylinder
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Old Sep 30, 2006 | 04:44 PM
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i hooked it up to the the coil by the brake master cylinder (blue wire) and its not reading the same rpms as the original tach
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Old Oct 1, 2006 | 07:22 PM
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i was testing it out today..,and when i rev to 4k, my new tach reads 2k
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Old Oct 2, 2006 | 09:59 AM
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Originally Posted by rootbeerdragon' post='839157' date='Oct 1 2006, 05:22 PM

i was testing it out today..,and when i rev to 4k, my new tach reads 2k


your new tach set to 4cylinder?
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Old Oct 2, 2006 | 03:30 PM
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ya i checked it twice
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Old Oct 2, 2006 | 03:44 PM
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lol, that aint right!



maybe hook it to the actual tach wire?
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Old Oct 2, 2006 | 04:57 PM
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the blue wire off the first coil from the firewall?
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Old Oct 3, 2006 | 06:33 PM
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...
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Old Oct 4, 2006 | 02:44 PM
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must look at car
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