Whenever I try to use one of those vehicle actor things like the Hover Tank or one of the Parcel Wars trucks, I lag to heck.

Is this because of outdated mods, my computer, or are vehicles just laggy in general? It's pretty annoying, since my vehicles would be fun to play with..

It shouldn't lag...

Maybe it's because of old mod support.

Unless the new physics hate how those mods work.

Does anyone else have this problem?

i noticed a bit of lag with the parcel wars ships, but nothing too bad.

You're right, and I have no idea why.
The Hovertank makes things really slow...
There's not anything I can think of that would make it so slow.
I made it, there's nothing irregular in the coding.
It's basically a normal actor except its feet and head and arms are all invisible.
And not even... They're 1 pixel wide and 1 pixel high. That and its PushForce is high so it hovers.
That's all...
That's very odd

Maybe that is the problem (1 pixel legs and head). I remember someone made a dropship pack with dropship that is 1 pixel small and it lags very much, although its just an ordinary dropship that is 1 pixel big.