tachometer differences
Supreme Member
Joined: Jul 1999
Posts: 18,457
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From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
No.
The tach "counts" ignition pulses, not crank revolutions. Since a 6-cylinder produces 3 ignition pulses per crank rev while a V8 produces 4, if you hook a V8 to a 6-cyl tach, it will read 4/3 of the correct crank RPM value.
The tach "counts" ignition pulses, not crank revolutions. Since a 6-cylinder produces 3 ignition pulses per crank rev while a V8 produces 4, if you hook a V8 to a 6-cyl tach, it will read 4/3 of the correct crank RPM value.
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Sep 12, 2015 08:57 PM