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Compression ratio 2 choices

Discussion in 'Turbo Tech Questions' started by Scamaro, Jul 22, 2014.

  1. Scamaro

    Joined:
    Apr 9, 2014
    Ok so i had everything bought and had to get another block. Well the machine shop took off .010 from the deck. So now im either looking at 9.8 or buy thicker head gaskets and go 9.2. Its a s480 turbo iron eagle platinum headed 355 pump gas street build
     
    Scamaro, Jul 22, 2014
    #1

  2. Mnlx

    Joined:
    Sep 20, 2009
    Cam, and intercooling could make a difference, but with iron heads, and pump.... i'd still go 9.2.
     
    Mnlx, Jul 22, 2014
    #2

  3. leeperryracing

    Joined:
    Oct 16, 2009
    ^^^x2
     
    leeperryracing, Jul 22, 2014
    #3

  4. ashford

    Joined:
    Nov 24, 2008
    probably something more important is piston to head distance. ideally you'd want .040-.055. .060- .080 is more detonation prone.
     
    ashford, Jul 23, 2014
    #4

  5. NOSLO86

    Joined:
    Aug 29, 2011
    What heads are you using?
     
    NOSLO86, Jul 23, 2014
    #5

  6. Mnlx

    Joined:
    Sep 20, 2009
    On something n/a for sure, but forced induction doesn't seem to as sensitive to quench for detonation control.
     
    Mnlx, Jul 23, 2014
    #6

  7. Scamaro

    Joined:
    Apr 9, 2014
    Dart iron eagle platinum 200cc intake 64cc chamber
     
    Scamaro, Jul 23, 2014
    #7

  8. Scamaro

    Joined:
    Apr 9, 2014
    It just sucks having to drop another 250 on head gaskets when the .040 ones would have been perfect for the other block
     
    Scamaro, Jul 23, 2014
    #8

  9. NOSLO86

    Joined:
    Aug 29, 2011
    If the heads are new and have never been installed -- maybe you could exchange them for some larger chambered one?
     
    NOSLO86, Jul 23, 2014
    #9

  10. Scamaro

    Joined:
    Apr 9, 2014
    They have about 1000 miles on them.. Im probably gonna run it at 9.8 and if i have issues ill pull the heads and change the gaskets. Im hoping with my intercooler and meth injection it will be ok
     
    Scamaro, Jul 23, 2014
    #10

  11. xr8tt

    Joined:
    Feb 14, 2003
    Can some unshrouding around valves lower compression ???
    Is there any meat there to machine ?
     
    xr8tt, Jul 25, 2014
    #11

  12. Scamaro

    Joined:
    Apr 9, 2014
    Being a dart head im sure theres some area there i could play with... Planned on finishing up the long block tomorrow. So ill def look into that before i bolt them down
     
    Scamaro, Jul 25, 2014
    #12
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