I am about to take on the headlight upgrade, replacing the H5s on my late '86 with H4s (I thought they were H4s, but no, they have the telltale "DOT" and aiming beads on the lenses).   I have the JWest relay kit, Euro H4s, and 80/100w bulbs.    My question is this - do I need to also uprate the headlamp fuses in the process?    60w is ~5 amps, but a 100w bulb is closer to 8a (certainly at least 7 at 14v).   I think the fuses in the panel are 5 amp?    I am thinking all four headlamp fuses should be replaced with 10amp in doing this upgrade.
But - I haven't seen this mentioned in any of the myriad threads I've read when searching on H4 and bulb upgrades, nor in the instructions that came with my relay kit - but I do recall this being an issue when I upgraded lights on an '89 BMW a few years back.
Is there some Porsche magic or something else I am missing that makes this unnecessary?   Am I overthinking this?    
 
John