vtr turbo decompression plate

1. beardyboy Infrequent Poster Joined: Mar 2011 essex Posts: 157 2001 saxo vtr turbo

   #1 13th March 2011, 20:40

   been looking through all the threads about lowing compression for a vtr turbo many people are undecided on witch way is best.
   
   Mods:
   ci tuning manifold and down pipe,with garrate t2 turbo, 5th injector and methonal injection on a mf2 controller,oil cooler and front mount intercooler
   
   looking to run around 8-9 psi, what size decompression plate will be best? and do i use 2 head gaskets either side of the decompression plate?
   
   thanks josh
2. blackie_2k5 Saxperience Hardcore! Joined: Oct 2008 Birtley Posts: 22253 VTR Turbo, 106 xsi track slag, Transit recovery, B

   #2 13th March 2011, 21:28

   just use 2 head gaskets
3. user_15989 Saxperience Forum Bum Joined: May 2007 Posts: 4857

   #3 13th March 2011, 21:28

   For such low boost you would be best in just using two head gaskets on there own.
4. beardyboy Infrequent Poster Joined: Mar 2011 essex Posts: 157 2001 saxo vtr turbo

   #4 13th March 2011, 21:36

   iv only got standard internals can i run more than 8psi with my set up then?
   what sort of power will i be looking at?
5. user_15989 Saxperience Forum Bum Joined: May 2007 Posts: 4857

   #5 13th March 2011, 21:59

   People have run 1 bar and over on stick internals with just a second gasket added but that is really pushing it. The mf2 on its own is not ideal so your best to stay on the safe side so around 8psi would be a good start.
6. beardyboy Infrequent Poster Joined: Mar 2011 essex Posts: 157 2001 saxo vtr turbo

   #6 13th March 2011, 22:08

   what do you mean the mf2 is not ideal on its own? want to know what is best as im rebuilding my vtr engine now. head and everything is off so want to do the most i can to benift me in the long run
7. Gareth_R Established Member Joined: Mar 2010 Basildon, Essex Posts: 1042 Citroen AX VTS

   #7 13th March 2011, 22:14

   If you get one you just do block, plate, headgasket, head
   
   Ferriday engineering you want
8. user_15989 Saxperience Forum Bum Joined: May 2007 Posts: 4857

   #8 13th March 2011, 22:19

   Normally if you where using a mf2 you would also use a SigCon 2 (or SigCon3) so that when it sees boost it would stop the standard ECU using its O2 sensor to calculate fuelling. As the standard ECU will see if your trying to run the car rich and it will try lean it back out. Most people just use stand alone management these days. It can even cost less then what the SigCon/mf2 combo did and when they where still in production.