Holloway rang the changes for the second round tie at Ashton Gate as goals from Jay Emmanuel-Thomas and Scott Wagstaff earned City a shock win.
And with Glenn Murray, Jerome Thomas and Yannick Bolasie sidelined and Wilfried Zaha having moved to Manchester United, Holloway will continue to search for the strikers and wingers he believes the Eagles require if they are going to have a shot at top flight survival.
He said: "It is obvious isn't it? We need some widemen and we need to address the goals and that is what we'll be doing.
"The main thing for me is that we've lost two of our main players who were really important for us last year in Glenn Murray with his injury and Wilf.
"And you add the new lad I bought in Jerome Thomas and Yannick Bolasie to that and we aren't quite the same. It makes a huge difference.
"It certainly will be a busy rest of the week. I don't know where it will go and who we will end up with but we will get some - you can see we need them.
"I can't tell you how many, it will be quite a few. I've got loads of plates spinning but it is so hard to get deals over the line these days, even in the Premier League. The closer it gets to that window the prices go up.
"I'll try and do what I can and the chairman is helping me as much as he can. Hopefully at the end of it all we'll have some sort of resemblance of a squad that can galvanise and do a little bit better."
Owen Garvan's stunning consolation came too late to cause any real worry amongst the Ashton Gate faithful but Holloway had few complaints about the performance his much-changed side put in.
"I can't be too critical," he said. "What I've got to do is stay calm and encourage my lads. I saw a lot out there that I was pleased with.
"No one's heads drops, no one made any mistakes, they just scored two very good goals. Ours wasn't bad either but it came a bit late.
"Some of my young lads did very well and got a bit of experience coming to a place like this."