yet to try the sound improvement !!!! i'll update later

Won't this spoil the rubber seal as a whole over time?

Hi all,

I've been following through this forum for quite some time, alot of great info here and thanks to all the contributors.

FYI this project is my first DIY to my FD2.

Just to share the process & results of my DYI for sound proofing.

Equipment
1. 20m pipe (bought from aquarium/fish shop, cost me RM12.00)
2. 4 pipe connector. (RM2)
3. Baby powder
4. Scissors
5. 1 decent size of jusco plastic bag for mixing powder with pipe.
6. Wet tissues. (i use baby wipes)

Duration - 90 minutes

Started off with back doors, as it was the easiest due to less 90 degree curve comparing to the front door.

Proceed with front door, took longer time as it was quite hard to stick the pipe in.

Process
1. Measure the front door. Cut the pipe, make sure to have additional extra length, about 15-20cm (2 unit)
2. Measure back door, cut the pipe, make sure to have additional extra length, about 15-20cm (2 unit)
4. Dump some powder, 1 back door pipe & mix it within the plastic bag. shake it.
5. Start off with 1st door (back door).
6. I stick the pipe in from front hole(near the 90deg angle & mirror), through upwards direction, the pipe will encounter the 90deg angle directly. What i'd do here is pressing the rubber a bit at 90deg so that the curve become wider and less 90deg, to ease the pipe movement. It's a bit hard but once your pipe has gone through the angle, the process of sticking in will be easier, with your thumbs pressing the angle while leaving some room for the pipe to snake in to the end. Cut off remaining leftover pipe.
7. Repeat step 4, and continue with the other back door(step 6).
8. Repeat step 4, this time with front door pipe.
9. Stick the pipe from back hole (near the >90deg angle) upwards direction. Make use of the additional hole to pull the pipe!
10. Repeat step 8 & 9
11. Wipe off the powder around the door with wet tissues.

For each door, i use the pipe connector to connect both end so that it makes a complete round. The pipe connector can be purchased at any aquarium shop. just tell them u got 2 pipes and want to connect them. they'll show u the connector.

Results
- No problem with closing door - do not need to be harder. Still the same
- Wind noise previously can be heard > 100kmph, tested @ 110kmph no wind noise. Will try 140km soon.

Tips:
Use a lot of powder, the pipe will stuck at some point when it reaches curvy part. If that happens, loosen the pipe by pressing/shake the pipe inside the rubber with your hand.... all the way around the door rubber. Continue stick the pipe in with the other hand

Make use of the additional hole. there are 2 holes for each door, one at the top front, near 90 deg angle(mirror), and the other one at the back, near door handle. If your pipe reaches the other hole, make use of that hole by using your hand to pull the pipe while the other hand continue to stick the pipe in, slowly.

Reason sticking the pipe towards the angle point first is to ensure you have the force to push the pipe at angle point. The angle is just a few cm away from your starting point, thus the force to push in will be much greater comparing to later stage, when your pipe reaches the angle point when it is a few meter long, losing out the momentum thus making the pipe almost impossible to push in.
(Another tips, if you find this method too hard, your can push the pipe the other way round(not towards the angle point), and cut off at the angle point.)

Have fun!