About the tick:
I noticed that if you overfill your oil you will have quite a bit of oil pressure fluctuation. That would be from the crank spinning up the oil like a blender creating bubbles that don't pump well. I figured that out when using a ZDDP additive to my oil. Got it a little too full and watched the oil pressure drop. On one really good launch I heard some ticking as the oil pressure dropped. I changed the oil making sure I got it exactly right on the stick and the pressure stayed between 40 and 60 consistently.
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