tried a thermometer on rail after normal casual driving and it shot off scale(only 42*c)id say its 60*c+ by hand feel, whats interesting is now feeling the incoming fuel pipe from pump to rail is quite cool by comparison(20-30*c)
certainly looks like the fuel rail and outgoing pipes are absorbing the ambient heat from the engine temp.
have bought some heat reflective tape to lag it (keeping away from nuts and fittings though)
looking at the 2x locating bolts and tabs, theres quite a surface area to transmit conductive heat into the rail, do you think its possible to isolate with washer of teflon or laminated phenolic or similar?(thats if i could get one in without upsetting the spacing of the rail and pipes?)
heres a pic of what and where i mean.
stilo fuel rail with phenolic spacer.jpg