|bigger injectors are lets say $600 more(to go from their 1000cc's to 1300cc+)
E85 is dirt cheap in the states. Not sure what Q16 goes for, but here it goes for like $6/L.. so for someone here to put in 20L(5 gallons), it would cost them $180..absolutely bonkers! The bigger injectors would pay themselves off in a few tanks of gas if you used e85 instead of Q16.
IMO it's a no brainer to go E85 if you have access to it, even if it means having to upgrade your fuel system.