RELATIVITY and EXPECTATIONS would seem to be THE key words when a description such as tiring might be used when seeking advice from others..? When I look at the list of machines you have or had available listed at the bottom of your post, it seems that you perhaps have a wide enough experience of old to new(ish) tec in both m/cycles and cars, also suggesting you have the option of horses for courses in terms of efficiency or something a tad more raw..
Back to exhaust systems and choices. Sorry I do not have experience of a single pipe system, however circa 20 years ago when I bought my 3.5, having spent many years messing with 911`s I was in search of a bit of a vintage driving experience to enhance my enjoyment of local roads and was advised that a +8 Morgan was THE way to go by some of the folk who still lurk around here.. and they were not wrong..(-:
It seemed that my rear tyres could polish the stainless exhaust pipe on occasion perhaps as the result of enthusiastic cornering. On looking for a work around that situation it seemed the diameter of the rearmost mounted silencers required the exh pipe connecting to them to be closer to the tyre than might be the case if they were removed and thus the pipe allowed to run closer to the chassis rail..? Job done and as the result the rumble, roar pop und bang, was amplified while bringing the old V8 to life.... exactly what I was after... (-: Though it seems while enjoying such youthful antics the tyres still rubbed the pipes on occasion..!
Tiring of the sound of a V8 Morgan... Relativity seems to come back into play..? When cruising along my +8 burbles away contently, though if I step on the loud pedal it barks, or with a bit more encouragement it roars, and on lift off in the roaring phase it can pop and bang.. Myself and my good lady covered a few Southern European trips from Central Scotland down as far as driving the Amalfi coast one Summer. Tiring, yeah well some days we perhaps pushed too far and in the heat of Italy in June in an old Morgan...did it feel like an adventure... you bet. Would it have been less tiring in a more modern sports car... I don`t doubt it..
As for speed bumps and ramps of all sorts, yeah tail pipe length is worth consideration, long enough to avoid odours being sucked back into the car, or blackening up the rear of the bodywork, side exit may avoid the ramps issues..
Good luck in your choices.
