As you may notice in the vid below, my tachometer is reading higher than the actual rpm. However, it is not in the additive sense (as in the entire range of the needle reads 50rpm high), but in the multiplicative sense (the higher you rev, the farther off the tach is). For example, I am hitting 6k rpms when my tach says I am at 6700rpms, but near idle, It says I am reading 950rpms when I am down at 900rpms.
I am currently looking through jdm92accorn's thread, since he took his cluster out at some point and showed how to adjust the gauges. However, I don't know if I am going to find the answer. He had a Nippon-Seiko cluster in his car, and I have the Nippon-Denso. In the NS, there are adjustment screws on the outside of the cluster housing, accessible from the top surface. This is not the case with the ND cluster.
Has anyone had to calibrate the tach on an ND cluster before? If so, I could use your help very much. I'm pretty sure I need to find the correct potentiometer and twist it to increase resistance, but I'm not sure where it is.
I am currently looking through jdm92accorn's thread, since he took his cluster out at some point and showed how to adjust the gauges. However, I don't know if I am going to find the answer. He had a Nippon-Seiko cluster in his car, and I have the Nippon-Denso. In the NS, there are adjustment screws on the outside of the cluster housing, accessible from the top surface. This is not the case with the ND cluster.
Has anyone had to calibrate the tach on an ND cluster before? If so, I could use your help very much. I'm pretty sure I need to find the correct potentiometer and twist it to increase resistance, but I'm not sure where it is.
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