Compression HELP.....

  1. Regular Poster Joined: Dec 2006 Ballymena, Northern Ireland Posts: 291 Saxo Vtr/S
    #1
    guys im currently doing a diy turbo setup, initially i wasnt going to forge the internals, however if i enjoy a turbo'd sax i would forge it at a later date!!

    Basically i was wondering if 2x 1.9mm headgaskets would lower the compression enough to run 0.6 bar of boost? or would i need it lowered more??
  2. Regular Poster Joined: Oct 2008 Nottinghamshire Posts: 334 Saxo VTR W-reg Escort RS turbo with about 160bhp
    #2
    if i was going to turbo a n/a car i would say you could run 0.3 of a bar quite easy on the standard engine/headgasket. how thick is the standard headgasket?
  3. Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi
    #3
    you can get copper decompression plates made up, forgetting the name of the place though.
  4. Regular Poster Joined: Dec 2006 Ballymena, Northern Ireland Posts: 291 Saxo Vtr/S
    #4
    yea dp engineering do decompression p[lates though they are like £250 and if i was going to buy one i wud just spend the extra muni and get pistons!! standard headgasket is like 1.4 mm or so.... i was gona run 2 x headgaskets and then possibly o.7 bar of boost... what do yuo guys think??
  5. Saxperience Post Whore Joined: Jan 2007 Shropshire Posts: 9994 Moonstone Blue 106 GTi
    #5
    If you want to run up t0 10/12psi on standard internals a single 1.9mm MLS HG will be enough to lower compression enough to run safely if mapping it spot on. If 8psi then a single 1.9mm hg be more than enouugh
  6. Regular Poster Joined: Dec 2006 Ballymena, Northern Ireland Posts: 291 Saxo Vtr/S
    #6
    cheers sophia, im going to controlthe fuelling with a dastek and it will be mapped by the supplier so i would hope the mapping will be ok...

    cheers