Essentially, no, you will feel no difference in your ride whatsoever unless and until you are in to the last 15 percent or so of your overall fork travel.
Fork oil height affects the air gap which is also sometimes referred to as the air spring. Air, being compressible, adds compression damping in the last 15 percent of stroke. It is an exponential curve.
Example;
I'm running .90kg/mm linear springs up front. I have the correct rate for my weight. I find, through trial, that while I am riding desert trails at speed I am blowing through my stroke and operating down in the lower third of my available stroke on the front. This is due to the fact, for scenario sake, that I have become a better rider and am now attacking this trail at a rate of speed which is higher than previous runs. Standard physics at play; double the speed, four times the force, etc.
In order to offset this I swap my springs for 1.oo kg/mm linear springs. I now have moved the bulk of my stroke function to the middle third of the available stroke and have effectively compensated for the forces being applied due to the above scenario.
As a result of this change I notice that the bike is now harsh near the end of its available stroke but still compliant and composed everywhere else.
The fix? Increase my air gap by drawing off 5 to 10 mm of fluid from each fork leg. This reduces the air spring effect and "softens" the compression damping at the end of the stroke which reduces the harshness of too much compression damping only at this point in the stroke of the forks.
Fork oil height is irrelevant and has no effect everywhere else in the stroke.
Hope that helps.
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