manifold (sound)

1. jonesyFX Saxperience Forum Bum Joined: Jan 2006 North-East Posts: 3060 172 Phase 1

   #1 3rd March 2008, 17:55

   dont know if this is a stupid question... but does anyone know if there is any difference in sound between a 4-2-1 manifold and a 4-1 manifold?
   
   cheers
2. Coonper Saxperience Post Whore Joined: Aug 2007 Coventry Posts: 5182 Lupo GTI

   #2 3rd March 2008, 17:58

   You wont really notice any difference i wouldnt have thought mate.
   
   The air has all equalised by the time it gets to the tail pipe anyway.
3. VTS_16v_Boy Saxperience Post Whore Joined: Aug 2006 Dartford Kent Posts: 5251 Pug 1007 HDi Sport (daily) / Abarth 500

   #3 3rd March 2008, 22:36

   If you had to engines the same with the same systems from the manifold back, then rev'd them together you might hear a slight difference but I doubt it really.
   
   The only difference your notice is in the torque curve between the two as they effect the engines breathing slightly.
   
   4-2-1 low to mid range gains
   4-1 mid to high range gains
4. daveyboyblue Newbie Joined: Oct 2007 Posts: 6

   #4 3rd March 2008, 22:38

   The Janspeed manifold setup on my car with a magnex back box is very quiet. So I wouldent have thought it made any difference at all.
5. VTS_16v_Boy Saxperience Post Whore Joined: Aug 2006 Dartford Kent Posts: 5251 Pug 1007 HDi Sport (daily) / Abarth 500

   #5 3rd March 2008, 22:44

   The VTS comes with a 4-2-1 mainfold form the factory all be it in two parts and in heavy cast iron but a desent 4-2-1 will slightly change the note if thats all you changed but it will be very slight