back preshure is it inportant

1. user_36547 Infrequent Poster Joined: Aug 2009 taunton Posts: 147 saxo vts turbo

   #1 5th December 2010, 12:15

   on the vts ive only got a back box and a cat nothing els but the performance has droped alot but cannot under stand why it has ,
   any ideas
2. Manu Saxperience Addict Joined: Dec 2009 Posts: 11714 A6 Le Mans tuned/A3 TFSI tuned

   #2 5th December 2010, 12:27

   yes back pressure* is important*
3. user_36547 Infrequent Poster Joined: Aug 2009 taunton Posts: 147 saxo vts turbo

   #3 5th December 2010, 12:27

   So would that be my problem to much free flow ,ive got a 2 1/4 full system and a 2 3/4 savage strate through back box, ummm may be
4. KamRacing Saxperience Addict Joined: Nov 2006 A farm shed in Aylesbury Posts: 14916 Corolla AE86 Peugeot 205 B18C (in bits)

   #4 5th December 2010, 12:30

   no gas speed is important. You want as high velocity as you can with as little backpressure as possible
5. Manu Saxperience Addict Joined: Dec 2009 Posts: 11714 A6 Le Mans tuned/A3 TFSI tuned

   #5 5th December 2010, 12:33

   depends on the car. I have seen a few saxos running with no exhaust on youtube, and they seem fine if a bit noisy..
6. user_36547 Infrequent Poster Joined: Aug 2009 taunton Posts: 147 saxo vts turbo

   #6 5th December 2010, 12:34

   cheers bud thats put me strate on that , poss a problem with somthing els ile have to look at fitting my afr meter back on ile do that now gets me out for a bit
7. user_43898 Established Member Joined: May 2010 leicester Posts: 1446 Clio 182 Inferno

   #7 5th December 2010, 15:04

   ive just fitted a cat back exhaust system on my vtr, basically a sportex race tube (silencerless) with a peco 3" backbox, didnt lose any power,maybe gained a little- just noticed its little more free reving, pops and burbles a bit now so decat next i think