The fuse that keeps popping is inside of the remote mounted fused connection before the relay for the Spal fans. The 15 and 5 you are referencing are located inside the fuse box and are not causing any problems.
I have had the Whipple kit installed for a few weeks and have not noticed the heat exchanger fans coming on. I found the fuse to be a 10 and blown, installed a new 10 and it popped immediately. Installed a 15 and it popped as well, installed a 20 and the fans run with no problem. My question...
Im thinking about moving my rear 19x9.5 275's to the front and putting 20x10 American Muscle PP wheels in the rear with MT comp 305/35. Will the rears fit? and has anyone else ran staggered wheel sizes?