What type of Tachometers were offered, and what does a high red-line mean?
Basically, a high redline tachometer indicated the guage was originally intended for use in a high performance (solid lifter) engine. Hint: – think Z28 or SS / pre-1973. The 8000 RPM tach was used exclusively in the 1970 – 72 Z28’s and solid-lifter SS engines, with the majority of regular tachs maxing out at 7000 rpm. (under construction) 1970 – 1978 – to 7000 rpm, yellow line at 4600 – 5000 rpm, redline at 5000 – 7000 rpm. 1970 – 1972 – to 8000 rpm, yellow line at 5600 – 6500 rpm, redline at 6500 – 8000 rpm.
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