Interesting, but scarey, experiences there, Martin. It is kinda strange though. Over on the main 911 Tech Forum, guys have been running Ethanol based fuels in their cars for many years without any dramas. Perhaps your experience was just a freak event? How did the fuel line look? Was it a split, or did it look like a gradually worn groove?
Anyway, I filled her up with 100 Octane (5% Ethanol) fuel last night. No real noticable difference in power or response. Last night was quite warm, so it's typical for these cars to be a bit sluggish in warmer climates. This morning however, throttle response felt a bit crisper and boost onset felt slightly quicker. Might just be because of the lower temps outside though.
I'm sure the 100 fuel adds an extra safety margin when running higher boost levels, but for everyday driving, it's an expensive solution and I'd probably stick to the normal 98 stuff.
'89 911 Turbo Cab
Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition