Neat Idea but probably not helpful
Keep in mind you have that big fan called the prop right behind the spinner. I am sure the prop will move more air.
Also the problem with doing any thing with "fins" on the spinner is the prop blades as they come out of the spinner are very blunt. The root or shank of a prop near the hub is either round (constant speed props) or almost square (fixed prop). The air flow is majority messed up in this area and there is little you can do but:
Make the spinner huge to cover the blade roots. (P-51D CLICK)
Here is an experimental Mooney that cafe foundation did (kind of ugly). They have a report you can look up. Note inner non-airfoil blade root covered. Also chin scoop should works terrible (poor, bad, not great) on a stock RV cowl/spinner. Van tried it on the firest prototype RV-6, he went back to the RV-3/4 style he has used on all his planes.
Extend to prop way out to make a better transition to the cowl. (Little Reno formula racer CLICK)
Since the Lyc has a crank/prop flange and than a big fly wheel the whole front end is messed up. Going to a large spinner is not practical and would be major modification of cowl. The extension is OK but requires you use a wood fixed pitch prop and more cowl mods.
Aircraft design is a series of compromises all integrated. If it was easy anyone could do it.
When a design hits on the right combo, we pilots should applaud the designers: Van-RV's, Boeing, Kelly Johnson (P-38, U2, SR71), Jack Northrop (Northrop flying wings N-1M, N-9M, YB-35, YB-49 inspiration of the B2 stealth bomber w/ exact same wing span). Last the greatest home-builders of all time, Wilbur & Orville Wright. Hats off to all the great designs and designers; it ain't easy. For every great plane there are 100's of not so great designs.
Keep up the designing and learning.