HomeyJay, are you sure it's a actually 6-8 full turns? Reason I ask is that after just checking on my planes it's pretty consistent on every one, in either direction; and "maybe 6-8" sounds like you're going with an impression, and be assured these can be way off. Mark the wheel with a bit of tape or something and actually count revolutions.
If what you actually have to do is 6-8 flicks of the wheel that's towards the upper end but still within normal limits. If it is 6, 7 or 8 revolutions that is a lot.
Because I pay so little attention to this – the amount of slop/backlash is what it is, I don't sweat the differences plane to plane (although it is nice when there's less) – I had to use a tape marker and actually do the count on even the plane I have used the most over the past five years, and the results surprised me. For every plane I currently have access to it's:
2 and a smidge.
2 1/2 -2 3/4... this is my user with the most play in the mechanism, and my mental estimate of the number of turns was way off. I thought it was far more than the preceding or next plane's.
2 1/8
2 1/4
2 1/4 - 2 1/2
2
1 1/8 (!)
That last one, a no. 5, the reason there's so little slop is the Y-lever (two-part type, not cast) is just a particularly good fit to the slot on the cap iron. Rather sadly this is a Frankenplane so the best adjustment of the lot, by far, might just be an accidental byproduct of the parts used!