I have an older model 360 and the framerate stutters quite a bit and I'm only on the first 3rd of the game. The board right before lab rats right before you get in the tank. Maybe it's the off screen tank launching rockets combined with guys shooting but damn it got choppy. It's also a bit choppy during regular shootouts.
Does anyone know if an install helps?

PS: I've been loving the single player and multiplayer but the singplayer framerate drops are a bit dissapointing. I'd rather lower res graphics with a smooth framerate but I appreciate the extent to which Crytek has gone to make this game look beautiful.

i personally think its better not installed i seem to get less pop up then and thats on a 250gb slim

That's suprising that an install would increase pop up.

I have the game installed on my 250GB HD, and no framerate issues at all with the game

Installed....but once a while during high action scenes will encounter frame drops...

I installed mine the day i picked it up and i haven't had any issues at all, idk if that's why but im problem free.

It doesn't help much

Install it, It makes your 360 last longer and live a happier life

I think your reason of drop is because the xbox is unable to cool sufficiently, so it is reducing usage on processors in order to cool down...

To test this, my friend had old xbox 360, which had same problems, so we added Air-conditioned duct on the side of xbox to cool it down faster...

wow the frame rate is stable .... definitely a cooling problem

I have the game installed on my Slim 250GB console, and no framerate issues at all with the game.