Reply to thread

See what others are reading now! Try Forums > Current Activity

Message: <blockquote data-quote="defcon1" data-source="post: 1824445" data-attributes="member: 30064">Wa Lau!!! Where Is Everybody?I have internet problems for a while, and everyone ponteng already.... :sad_smile:Anyway, the promised update to my insulation project...Last week, I got bored again, and decided to cover the last bits behind the rear passenger seats. So, I took off the rear seat to get at the metal underneath.a) The horizontal part of the back seat area is already covered by a thick layer of bitumen that came stock with the car. After conducting the "rap" test, which involves rapping knuckles hard against the surface to be tested and listening for how much it resonates, I concluded that my cheap bitumen flash strips would not improve it's properties any further.b) The wheel wells, however, were another matter completely. On each side/corner, the wheel well "intrudes" into the passenger compartment. Considering that I had been hearing a lot of wheel sounds, I double layered both of them.c) Between the back seats and the boot is a metal bulkhead. This bulkhead consists of a "frame" which goes round the "hole", basically from the two sides against the chasis, the speaker panel on top and the floorboard below. On top of this squarish frame, Nissan has a large sheet of steel bolted on to block off the hole. I can only guess that in some versions of the ceffy, there might be seats that can be "dropped" to increase the carrying capacity of the boot...like most compact cars today. Since ours does not come with this feature, they chose to block off the hold by bolting on a thick metal plate to cover the hole. This is a BIG mistake.Originally I did not layer this part, as I guessed that with the huge pieces of foam (the seats) against it, it was unlikely to cause too much problems. But as I was bored...I decided to do it anyway. So, one layer of bitumen strips, 100% coverage. I did not even bother to cut out the holes for the nuts, and just layered over the metal plate completely. On top of this, one layer of 9mm Insuflex. It is better to glue the Insuflex to the seat than the metal bulkhead. This will make re-installation easier.No insuflex was applied under the seat as the tolerances would not allow for anything thicker than 3mm to be applied.The results...MY SOUND SYSTEM SOUNDS AWESOME!!! For the first time, the bass from my Blaupunck Velocities sounds...er...bassy and clear! I can now virtually run without a sub-woofer...though a sub still makes for slightly better sound. The only drawback...my little Blaupunck active sub in the boot is no longer powerful enough to punch through into the passenger cabin. Looks like my wife is going to inherit a very nice sub-woofer for her soon to be soundproofed Myvi. Me, on the other hand, have started working on the plans for a home designed and built active sub-woofer... <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1425" alt=":smile:" title="Smile    :smile:" loading="lazy" data-shortname=":smile:" />Another bonus...the tyre sounds have been reduced by at least 70%...<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1425" alt=":smile:" title="Smile    :smile:" loading="lazy" data-shortname=":smile:" /></blockquote>