Improving starter performance is good both for the starter and battery, it prolongs it's life significantly.
I had my car for nearly 12 months now. Early on I upgraded the 2 grounding wires connecting the chassis and the engine block. I did not notice much difference on the starting. At the beginning of this week I installed thicker grounding wire from the chassis to the terminal (I'm not sure why I just installed it now as I made it a while ago). I must say this improved the general starting on the car (cold and warm). Aaronng and Fredoops, I'm sure have done something like this (grounding upgrade) and might worth asking them whether it improved their starter performance.
On something different. One thing I noticed today when I lock and unlock the door during idle, the idle went sluggish. Soon I will install my upgraded voltage stabiliser (pivot mega raizin) and see if it can improve this problem.
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