Its rare enough not to bug me. IIRC some tracks seem to have a bit of "hitching" in roughly the same spots but I can't remember which ones or where. Frame time issues would definitely be more noticeable when the screen is panning (just like it wouldn't be noticeable at all if nothing on the screen was moving). Other than that I don't really have anything helpful, Just that it's not a few times a minute. I'm pretty picky about that stuff and confident I would have noticed.
Good luck figuring it out, If you have a particular section or track you want me to test let me know and I'll fire it up.
Hmm, yeah that sounds about right. It is quite random and usually doesn't happen on the same spot twice.
As for frequency, on the longer tracks like The Nurb and Lemans, definitely more than once. On the regular tracks maybe once or twice, that's it.
Then sometimes, it doesn't happen at all on the regular tracks, but I'd say the ratio of happening vs not happening is definitely higher.
And, I'd be delighted if you could try out the following tracks:
Lemans Bugatti after the chicane going into the long downhill right-hander; happens somewhere around that.. then again you take two sharp right-handers and hit a small straight before the chicane.. it might happen again. In the remaining laps it'll happen less probably.
Lemans old and current: as you hit the first straight after the fast right-hander... somewhere in the beginning.
Prague: this is a tricky one, it'll happen at least once....as soon as you take the first right then take the long fast left (the river's to your right), it might stick for a split second, if not.. you'll definitely feel it in the next few seconds. One or two stutters on the first lap all in all, maybe one stutter on the next lap or none at all.
Indianapolis: One to two stutters, sometimes just one after turn 3 or 4 I guess. It's random.
I think apart from Lemans, stutters are generally random on tracks... I felt it once playing on the Top Gear track with all that silly stuff flying around, it was one of those "special events" and it stuttered for a split second. When testing out a car on the Top Gear track I've noticed the stutter maybe once, but generally none at all.
I've barely noticed them on Yas Marina, Road America or Road Atlanta.. Laguna Seca maybe once on the first lap, then once on the second or none at all.
The Alps, perhaps once, then not at all after that.
Catalunya, not sure... maybe once or twice, that's it.
You can probably tell we're on the same boat here, the frequency isn't very high, and like you, I'm accustomed to them by now, it isn't a major issue by any means, but it was quite surprising to see it in a FM game.
I did some research on this and sure enough there were complaints on gamefaqs.com as well as forzamotorsport.net. Some recommend getting a faster HDD.
Cheers man, I appreciate the help.
Edit: Have a look -
http://forums.forzamotorsport.net/t...rame-Rate-Drop-on-Le-Mans-Old-Straight.aspx?=