Postby burfadel » Fri May 13, 2016 6:05 pm
Some cars are pretty bad for road noise. The Lancers' pretty much have no noise insulation for the wheel cavity, apart from what little the wheel arch stone shield (the thing that people still think is part of the metal wheel arch) provides. Dynomatting can be fairly expensive if doing the vehicle, and other noise deadeners don't necessary work too well on that kind of noise. I've been contemplating buying a tub of Septone Body Deadener and taking the linings off and painting the inside of the arches, although I haven't taken the linings off to see what's underneath yet. I guess if you had a free day you could paint them on part of your road trip!
Apparently this has worked wonders for some people, and others that say it doesn't do anything or much at all. They are usually the people who haven't done it. The main issues people have is that it can be messy, or those that have used a similar product and painted their boot floor and not letting it dry in the open (so smells a bit tar like in the cabin for a while). Since the application is outside the car it should be okay. I don't know what benefit painting the inside of the wheel arch lining cover would make. I guess it would add a little bit of benefit, at worst I guess it would just make it a little stronger.
I'm also not sure on how much you need for 4 arches. I believe 1 litre (small tin) isn't enough, but with the 4 litre tin you'll have plenty left over. The stuff can be layered so that really isn't an issue. You can then always paint the boot floor when you have the opportunity for it to dry or when you get home. The other alternative is to buy the spray can version, but apparently that doesn't work as well. You also pretty much have to shake the tin till your arm hurts, ideally after warming it in hot water. Then, you pretty much have to use a can per wheel arch.
The lack of noise insulation saves them a little money in manufacturer and a little weight on the final car, but the extra few kilograms of using a tin is well worth it I think. If you want further insulation then you can use dynomatt, but keep in mind that is more expensive, and you can't really use it on the front wheel arches. It's suited more for sound installations to stop resonance in panels, so in effect is a product targetting something different. The body deadener is resonance stopper and noise blocker, the dynomatt is just a resonance stopper. This is why you will read in forums people saying you don't need to cover the whole panel, covering part of the panel works to stop the resonance. The noise blocking is a nice side effect of it, but like I said you can't really apply it to stop front wheel noise, and even rear wheel noise you can only stop it in certain places. The Septone Body Deadener can cover all interface areas between the inside and outside of the car from the wheel arch. It's also hidden under the wheel arch lining so no problem there. Just don't be like some people who apparently painted the wheel arch lining and not the actual car body beneath it, and wonder why it didn't work a well as expected.
All that road noise you currently have must make for a tiring ride. The other thing you mentioned could be helped by new bushes when you get home, but you would have to target the right ones (if any at all help). Probably Superpro bushes for some things, really only want harder ones like nolathane on sway bar bushes etc., but I'd stilll go for the Superpro ones for those. Most of that jitterness is likely due to tire profile and pressure, different dampeners (shock absorbers) could possibly help to some extent. If you do the bushes and it doesn't help the jitterness, it still isn't a loss since polyurethane bushes generally provide better handling. The downside is if the bushes are too hard (like nolathane are hard) it will improve handling but also make the ride a little harsher. That's why I suggested softer Superpro bushes.
Last edited by
burfadel on Fri May 13, 2016 8:40 pm, edited 1 time in total.
I might add a pic of my car once I style the exterior a bit

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