I took my inspiration from
http://ecomodder.com/forum/showthread.php?t=1405 and picked up some pipe insulation from the home center.
The gaps in the Wrangler grill are 2 inches wide, so I got the largest insulation I could get. I got the firmer stuff, not the squishy stuff.
I cut it slightly longer than the opening and wedged it in. It seems to hold in there OK, standing still at least. But it was clear that it wouldn't stay, so I notched, actually just a slit, in the top and bottom and used that to hold to the upper and lower ends in place.
A few test runs yield them pretty stable, however in every attempt at speed one would get pushed into the space behind the grill. There must be just enough pressure build up ahead of them and once one gives, the rest are spared.
So, now I'm down to finding a way to keep them in. Short of hot melt glue tacks, I need to find a way to keep them from pushing through. I was thinking about lacing them together with monofilament line, but that won't do on the ends. Toothpicks may work, but may be unsightly, and won't be a long term solution.
I don't have good numbers with the SGII yet, check out the trip logs for any details. I've had to reinstall my spare and am getting ready for a road trip - it's a Jeep thing...
Anyway, here are a couple of pics to show my progress.
