Water enters footwells in rainy weather - from where ?

@Kuehl

Bjoern - A common area that leaks on many cars is at the very rear of the cockpit behind the seats.  Water from the street gets thrown outward as the wheel spins and some gets thrown forward against the body inside of the wheel well where it finds a small opening between the pan and the body.  From there it can run forward in the cockpit as you apply the brakes and get under foot.   😡

Look just above where the shift rod rubber boot is.  There is often a gap just above the central tunnel that needs to be filled with silicon caulk or foam.  From the top of central tunnel, follow the pan/body seam towards the outside L/R sides and seal all along the seam.  Silicon caulk or foam will work here - Silicon caulk makes a neater look, nut it may be difficult to get the caulk in where you want it so spray foam might work better.

The same applies to the pan/body seam at the front of the cockpit and the fix is the same.  Start at the top of the tunnel from the gas tank side (remove the front wheels for easier access) and fill any open spots with caulk or foam from the central tunnel out to the L/R corners of the cockpit.  

I assume that no water is getting in at the bottom, front, corner of the side windows - I had to mess with my window seals for a while before I cured that pesky leak in that corner.  Water would come in and run down the door edge and onto the floor.  

That’s all I’ve got.   Gordon

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Bjoern, did you specify 'mit Dusche' when you ordered your car?

Unfortunately, this is a common problem, and Gordon's is the usual advice for solving it (although for most of us, the 'solution' is to not drive in the rain!).

A more direct approach involves installing these in the rear floor pans:

@Kuehl posted:

Since a couple of months I drive my VMC Speedster here in Germany. We are not having sun all day long, not even in summer. It happens that a shower is comming up while driving on highways.
Result : 1 quart of water on the floor on both sides .

Bjoern, as noted above, this is a common problem with our cars since they replicate the original Speedsters. Gordon has made great headway at identifying leaky areas and figuring out ways to slow the flow rate.

I've done the big things (especially paying attention to the area under the rear package tray (or seat if you're feeling euphemistic).

The main thing I've done is to take out the carpet behind the seats, pour in some water to see where the lowest points are, and drill a hole in the floors behind each seat to make sure that the water that gets in drains out.

I put rust proofing around the holes after the drilling, too. Good luck!

That last statement from @Michael Pickett is the easiest solution. You've got to let it out after it gets in. And it WILL get in.

@Kuehl posted:

Since a couple of months I drive my VMC Speedster here in Germany. We are not having sun all day long, not even in summer. It happens that a shower is comming up while driving on highways.
Result : 1 quart of water on the floor on both sides .

Bjoern, congratulations on your VMC Speedster. You should have lots of fun with it. Please continue to let us know how it's going for you.

I do admit that I'm surprised you got a quart of water on each side. I would have thought that it would have been closer to a liter...

Good luck and enjoy your Speedster when the weather permits!

The car can be effectively sealed. Enlarging the side curtains, and  installing the mid windscreen seal. This will also stop air pressure leaks coming in the tube on the floor.