I have been giving my car a bit of a treat recently, a good wash n wax, washed and waxed all my alloys, cleaned up all the exterior plastic trim (which im soon getting pained) cleaned the interior, replaced a few parts which were looking a bit tired.
I then moved onto the engine, replaced the oil and filter with good quality stuff, upgraded the plugs to bosch Super4's (which really make a difference), and made a start on tidying up the engine bay.
I wanted a change from the airbox so i purchased a cone filter as i think they look great and also i like the noise you get from them.
So removed the airbox and attatched the cone to the pipe which originally fastened to the airbox. Sounded great, but after a couple of days i noticed the performance was suffering a bit due to the cone filter getting too warm as its quite far back in the engine bay, so i placed it at the front next to the cold air feed and used a piece of drain pipe to fill the gap from the pipe to where the cone filter now is positioned.
Had a test drive, the performance is now much better as the cold air is keeping the filter a lot cooler, but...... here is the puzzle the induction noise is now a lot quiter, i would say about 50 per cent quieter,
Now Im all for better performance, and its good to know that the filter is staying cooler, but i miss the noise i had before as it really sounded nice, and im really puzzled as to why its now quieter, my mate reckons its due to the material the drainpipe is made of (plastic) sapping the sound, bit im not convinced... any thoughts guys?????