Team, Why does the factory tach, not seem to be able to keep up with the engine rpm's??. A lot of LS6 owners are having this anomaly........ The rev limiter is bouncing BEFORE the tach needle get's to the redline???.
Joined: Dec 2000 Posts: 5,992teamzr1 Owner - Pays the bills
teamzr1 Owner - Pays the bills Lives in Engine Bay
Joined: Dec 2000
Posts: 5,992
America
Consider the PCM computer only operates at less then 17 Mhz and your P/C is 200 Mhz to 1 Ghz and now you know why.
With that slow of a CPU at higher loads and RPMs the PCM cannot handle all the functions and monitoring thus the RPMS is considered less of a importance and is not updated as quickly as other functions needed for the engine to operate.
If your into shifting close to the limits then install a shift light, use one that uses LEDs since they will light faster then one that uses a bulb and set it to come on a few hundred RPMs lower then rev limiter, thus when it does come on you will be close to the true limiter RPM.
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