BHP Gain

1. DazzerVTR Regular Poster Joined: Jun 2006 Tolworth, Surrey Posts: 360 Saxo VTR MK2

   #1 18th December 2006, 22:45

   Just out of intrest I currently have a Powerflow catback system, I was wondering what sort of BHP gain would I see out of a decat and 421 fanny?
   
   It's a MK2 VTR with cat under car.
2. S34MER East Midlands Joined: Jun 2006 Derby Posts: 8305 Skoda Fabia VRS

   #2 18th December 2006, 23:06

   dunno 3-4bhp maybe 5 IF your lucky! but thats only a guess, no-one will be able to tell you exactly!
3. KamRacing Saxperience Addict Joined: Nov 2006 A farm shed in Aylesbury Posts: 14916 Corolla AE86 Peugeot 205 B18C (in bits)

   #3 19th December 2006, 00:08

   you will get a gain but I'd hate to put a figure on it.
   
   performance manifolds and cat bypass are good things
4. hesslevtr Saxperience Hardcore! Joined: May 2004 Hull (England) Posts: 18709 1.6 vtr

   #4 19th December 2006, 13:07

   get yourself a 4-1 manifold
   
   dont be expecting miricales with them mods but will see a gain
5. Colin Saxperience Forum Bum Joined: Jan 2006 Banbury Posts: 4623 Saxo Rally Car Evo 6

   #5 19th December 2006, 13:56

   I had a 13hp gain with a Raceland and a de-catted Powerflow.
   
   I have prints to prove!
   
   And its in Pgti mag this month, although the 103hp figure is at the FLYWHEEL!
6. VTS_16v_Boy Saxperience Post Whore Joined: Aug 2006 Dartford Kent Posts: 5251 Pug 1007 HDi Sport (daily) / Abarth 500

   #6 19th December 2006, 15:05

   Thats the problem with doing one bit at a time, the gains from adding a bit at a time are always going to be small but changing the whole lot in one go would have seen the most difference in before and after.
   
   Figures will vary between car to car but either of the performance manifolds and decat or sports cat is a good idea.