boost pipe

1. Rob-C Established Member Joined: Nov 2007 Maidstone Posts: 1223 Citroen Saxo VTR MK2

   #1 27th November 2009, 23:54

   looking at different boost pipes for my turbo conversion
   
   im looking at running around 6psi of boost as im not upgrading internals im just having a thicker head gasket with decompression plate
   
   iwhat size is recommended?
   
   i was thinking 2" pipes but thought maybe 2.25" or 2.5" what do you guys recommend for a vtr on low boost
2. blackie_2k5 Saxperience Hardcore! Joined: Oct 2008 Birtley Posts: 22253 VTR Turbo, 106 xsi track slag, Transit recovery, B

   #2 28th November 2009, 03:25

   covered a million and one times mate
3. 3cott Saxperience Forum Bum Joined: Mar 2008 Rotherham Posts: 4614 Black mk2 vts

   #3 28th November 2009, 08:27

   2.5 inch...
4. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

   #4 28th November 2009, 08:42

   I would try and future proof yourself - if your going for Vts engine now I'd drift towards bigger boost pipes like the 2.5'' but IMO you're limited by the size of the throttle body - what's it's internal diameter?
5. Rob-C Established Member Joined: Nov 2007 Maidstone Posts: 1223 Citroen Saxo VTR MK2

   #5 28th November 2009, 11:55

   the vtr throttle body is 57mm iirc
   
   i was thinking of 2.5" but i didnt wana get it and end up having pressure drop?
   
   
   anyone know the pro's and con's with 2.25" and 2.5"
6. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

   #6 28th November 2009, 12:14

   IMO I can't see there being much difference between 2.25" and 2.5" unless your looking to run high boost etc. and pushing bhp amounts.
   
   If you going for low pressure and WON'T want more boost in future then makes sense to go for a small tube to reduce lag - BUT people always tend to want to up the boost pressure in the future . . . . . . .
7. Rob-C Established Member Joined: Nov 2007 Maidstone Posts: 1223 Citroen Saxo VTR MK2

   #7 28th November 2009, 12:19

   yeah well i was going to go for 2" boost pipes but i MAY upgrade to a vts in future
   
   would 2" boost pipe be good for say 10psi on a vts or would it be to restrictive?
8. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

   #8 28th November 2009, 12:21

   Quote:

   Originally Posted by Rob-C yeah well i was going to go for 2" boost pipes but i MAY upgrade to a vts in future would 2" boost pipe be good for say 10psi on a vts or would it be to restrictive?

   I haven't tried a turbo conversion with different bore boost pipes or anything so I'm just using common sense here.
   
   I'm pretty sure 2" won't be restrictive @ 10psi on a vtr turbo if running a normal size turbo (ie not massive, looking for peak bhp figures)
9. Rob-C Established Member Joined: Nov 2007 Maidstone Posts: 1223 Citroen Saxo VTR MK2

   #9 28th November 2009, 12:22

   i was asking if 2" would be restrictive at 10psi on a vts mate not vtr lol
   
   will be using a gt17... if its possible to run that at 10psi that is
10. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

    #10 28th November 2009, 12:35

    Quote:

    Originally Posted by Rob-C i was asking if 2" would be restrictive at 10psi on a vts mate not vtr lol will be using a gt17... if its possible to run that at 10psi that is

    Sorry, I got confused what engine you were turbo'ing
    
    I don't know what psi it'll run, but gt17 would be a bit small for a vts I would have thought - I'm no expert on turbo sizes though.
    
    Common sense would tell me it's too small from looking at the hp from the cars listed here (they all seem to be diesel):
    
    http://www.dieselevante.it/turbochargers.asp?idfam=GT17
    
    Surely you want over 200bhp from the vts engine?
11. Rob-C Established Member Joined: Nov 2007 Maidstone Posts: 1223 Citroen Saxo VTR MK2

    #11 28th November 2009, 12:37

    yeah true... im turboing a vtr but thinking of maybe upgrading to an S in future... will have a browse thanks for the link mate thats handy!
12. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

    #12 28th November 2009, 12:45

    Quote:

    Originally Posted by Rob-C yeah true... im turboing a vtr but thinking of maybe upgrading to an S in future... will have a browse thanks for the link mate thats handy!

    Well I suppose either way you'll need a new manifold going from vtr to vts, so may as well upgrade the turbo for more power on the vts - if you fit a vts engine.
    
    So maybe stick with the GT17 and 2" boost pipes with the vtr turbo for minimum lag and reasonable power - they can re-think things if you get an 's' engine?
13. Rob-C Established Member Joined: Nov 2007 Maidstone Posts: 1223 Citroen Saxo VTR MK2

    #13 28th November 2009, 12:52

    yeah true mate
    
    cheers for the info