manifold advice?

1. steviet Saxperience Forum Bum Joined: Jul 2006 Posts: 4119

   #1 16th August 2007, 23:32

   ive got a phase 2 vtr and im looking for a 4 branch manifold. i seen a manifold in the french car mag. its a 4 branch with the sport cat built into it. basically im thinking about buying it cause i can`t be assed messing about at mot time putting the standard one back on. has anyone got one of these manifolds? and are they any good?. and do they release any extra power. cheers
2. user_15989 Saxperience Forum Bum Joined: May 2007 Posts: 4857

   #2 16th August 2007, 23:42

   Sports CAT in down pipe is not that great way of doing it. Better to get a sports CAT is your main system.
3. Aron Saxperience Forum Bum Joined: Feb 2007 Nuneaton Posts: 3554 EP3 Civic

   #3 16th August 2007, 23:46

   get a supersprint center section which has the cat in it and then get a descent manifold.
4. steviet Saxperience Forum Bum Joined: Jul 2006 Posts: 4119

   #4 16th August 2007, 23:54

   Quote:

   Originally Posted by AXracing Sports CAT in down pipe is not that great way of doing it. Better to get a sports CAT is your main system.

   
   hows that mate ?
5. user_15989 Saxperience Forum Bum Joined: May 2007 Posts: 4857

   #5 17th August 2007, 00:02

   The hole point of the tuned length tubular manifold is to control the pressure waves in the exhaust gasses coming from the cylinders. This is why the pipes are so long on good exhaust manifolds. The manifolds with the cat in have very short primary pipes. So simply don’t work like a performance manifold should.
6. steviet Saxperience Forum Bum Joined: Jul 2006 Posts: 4119

   #6 17th August 2007, 00:05

   so do you think it would be best to get a manifold without the cat ? decat manifold. cause i don`t want to replace the exhaust system thats on it as i just bought it. its a magnex system , so what manifold would be best if i went down the decat manifold road? cheers.
7. KamRacing Saxperience Addict Joined: Nov 2006 A farm shed in Aylesbury Posts: 14916 Corolla AE86 Peugeot 205 B18C (in bits)

   #7 17th August 2007, 08:25

   I would get a manifold without the cat and fit the version of the cat that goes into the exhaust.
   
   This would be significantly better (and cheaper) than a mani/cat combo
8. Jimmy-Boy Saxperience Post Whore Joined: Jul 2006 Suffolk Posts: 7551 N/A 200bhp+ per ton 106 gti

   #8 17th August 2007, 10:29

   Quote:

   Originally Posted by KamRacing I would get a manifold without the cat and fit the version of the cat that goes into the exhaust. This would be significantly better (and cheaper) than a mani/cat combo

   totally agree you get better performace for money that way
9. Saxo_Steve Frequent Poster Joined: Apr 2006 Prestwick Posts: 952 Saxo VTR mk2

   #9 18th August 2007, 17:09

   Your Magnex system will have a decat pipe to extend the centre section to the manifold, just take this section of pipe out and put a sports cat in there.