Fitting 1.1 centre section exhaust to vts

1. Liaaaam Newbie Joined: Jun 2013 Posts: 4

   #1 15th June 2013, 11:01

   Hello guys i am looking at buying a new centre section for my car, i know the bore is smaller and i also know it will fit but my question is will it actually cause a decrease in power or will it be fine ?
2. Sophia_Bush Saxperience Post Whore Joined: Jan 2007 Shropshire Posts: 9994 Moonstone Blue 106 GTi

   #2 15th June 2013, 11:26

   should cause any issues, would of thought the difference not to be really that noticeable, I know of someone selling a supersprint mid section from manifold back if thats what your after can point him to this thread if wanted?
3. Liaaaam Newbie Joined: Jun 2013 Posts: 4

   #3 15th June 2013, 18:07

   These are only £13 at my local motor factors so that should do the job for now as mine has several holes in it
4. m4tt274 Saxperience Forum Bum Joined: Sep 2011 Doncaster Posts: 2627 Fabia VRS, mk1 fiesta + some others

   #4 15th June 2013, 18:18

   Slightly increased back pressure will make it a bit stronger mid range, bit slower top end.
   Kinda the opposite effect of a 4/2/1 in some respects i would have thought.
5. user_34323 Saxperience Post Whore Joined: May 2009 ringwood Posts: 6305 suzuki swift 1.2 sz3

   #5 15th June 2013, 19:03

   Quote:

   Originally Posted by m4tt274 Slightly increased back pressure will make it a bit stronger mid range, bit slower top end. Kinda the opposite effect of a 4/2/1 in some respects i would have thought.

   You never want back pressure in a 4 stroke engine.
   What I think you along with quite alot of this forum are making the mistake of is confusing exhaust pulse tuning to back pressure.
6. Liaaaam Newbie Joined: Jun 2013 Posts: 4

   #6 15th June 2013, 20:52

   I have a decat going on aswell if thats any help
7. AlexBp West Midlands Joined: Dec 2007 West mids Posts: 23149 Supra,civic GL

   #7 15th June 2013, 21:01

   if you get the right 1.1 exhaust you wont need a decat pipe
   i have a 1.1 pipe on my yellow gti as i did a few years back and it didnt seem to cause any running issues
   done it on a vtr too
8. Liaaaam Newbie Joined: Jun 2013 Posts: 4

   #8 15th June 2013, 22:31

   Quote:

   Originally Posted by AlexB if you get the right 1.1 exhaust you wont need a decat pipe i have a 1.1 pipe on my yellow gti as i did a few years back and it didnt seem to cause any running issues done it on a vtr too

   Just what i needed to hear thanks mate
9. m4tt274 Saxperience Forum Bum Joined: Sep 2011 Doncaster Posts: 2627 Fabia VRS, mk1 fiesta + some others

   #9 15th June 2013, 23:50

   Quote:

   Originally Posted by wadoryu You never want back pressure in a 4 stroke engine. What I think you along with quite alot of this forum are making the mistake of is confusing exhaust pulse tuning to back pressure.

   Im not confusing anything, im just giving a seriously numbed down response.
   
   What your referring to is inertia tuning. The size of the midpipe had fuck all to with the black art of pulse tuning.
   
   Without any other insight needed i will just be able to predict that anyone with a VTR or S with say, a supersprint that then fits a 1.1 scrawny midpipe will notice a slight gain in low/midrange and slight drop in top end power.