Pakistan face England - the number two IT20 ranked side in the world - with a big crowd expected.
"Every time we come to England there are a lot of Pakistani supporters who come and watch matches," said Dar. "They always give us confidence and they're always talking about us.
"Cricket is in our passion, so we're hopeful they come and give us a boost."
Speaking about the first game of series, the 37-year-old added: "We're very excited as it's been seven years since we've played England. The West Indies series has prepared us well and we showed fight over there.
"We arrive with three practice days and a match, which went very well and we've seen Sri Lanka win two games here. That boosts us and gives us confidence."