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FX35 Motordyne Spacer Qizztionnnn!

Discussion in 'FX (03-08) - Engine & Drivetrain' started by sgvxcheese, Dec 22, 2007.

  1. sgvxcheese

    sgvxcheese Member

    1,123
    0
    Southern California
    infiniti fx 35
    Alrite, well i was looking at the motordyne site for the 1/2 spacer. However they offer several sizes and types of thermals. My question is what is the difference between sizes and the Basic Vs. Iso thermal spacers? Also, after installing the 1/2 spacer i have to leave out my engine cover if i put on my strut bar? correct me if im wrong.
     

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  2. Psiclne

    Psiclne Guest

    The size difference is just that. Since the FX can fit the 1/2" thats what I did. A lot of the G/Z guys use the 5/16 (I believe) cuz of clearance issues under the hood. You can still use the cover after you install the spacer.

    [​IMG]
     
  3. brown_fv

    brown_fv Premium Member Premium

    With the 1/2" spacer you can still fit the engine cover and strut bar (like shown above)

    the ISO thermal version will help prevent heat soak (robs you of HP). this would be helpful at the track with your car waiting in line because the heat under the hood will build up causing your intake to breathe in hotter air until your car gets moving. if you live in a hot place like cali its good to have but its not 100% necessary.
     
  4. Frankiago

    Frankiago Evo Troll Premium

    2,563
    0
    IL
    IMHO the iso thermal does not do what it's supposed to. My plenum still gets super-hot, and I even had the all-out copper iso-thermal kit and when I actually had the copper part on, same results.

    I got the 1/2" as well and the engine cover does fit just fine over it. The reason Z/G guys go 5/16 is because of it being able to still work with the factory strut bar, not hood clearance. The Z/G guys I believe can fit APS Tall Boy plenums with factory hood and that thing is a monster (atleast 1/4" bigger than stock plenum + 1/2" spacer I believe).
     
  5. HumbertoCALI

    HumbertoCALI Premium Member Premium

    3,868
    0
    South Gate, CA
    2003 FX45 AWD
    Garages:
    1
    That engine bay looks horrible... I think this one looks way better..:p:LOL:

    [​IMG]

    :6wink:
    :4tongue:
    :xd:
    :boxing:
     
  6. Psiclne

    Psiclne Guest

    Ok - you got me there, thats why you got 1st place and I got 2nd place @ the Toys for Tots thing....:frown: Technically 3rd cuz Doc got BOS FX. Kick me while I'm down why dont cha.
     
  7. HumbertoCALI

    HumbertoCALI Premium Member Premium

    3,868
    0
    South Gate, CA
    2003 FX45 AWD
    Garages:
    1
    C'mon.. you know you the man out there......
     
  8. Dr.2K

    Dr.2K iS Doctor on Duty iS VIP

    11,683
    9
    Santa Clarita, CA
    2005 FX45
    Garages:
    1
    Play nice you two =) Both need some cleaning!!! :LOL::p:LOL::rofl:
     
  9. FXchris305

    FXchris305 Member

    608
    0
    miami
    2005 Honda S2000
    Garages:
    1
    whats the difference between the 5/16 and the 1/2 spacer ?
     
  10. cambo

    cambo Member

    96
    0
    Chantilly, VA
    2005 Fx35 awd
    3/16" of spacer material....

    :rofl:
     
  11. Rubare

    Rubare Premium Member Premium

    2,705
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    NYC
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    If I can remember correctly the 1/2 give you more power at low RPM and the 5/16 give you power at higher RPM..

    I think that's the difference.. I know for a fact other members know for sure, so correct me if I'm wrong..:p
     
  12. drew855

    drew855 Premium Member Premium

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    I'm pretty sure it is the opposite of that
     
  13. Rubare

    Rubare Premium Member Premium

    2,705
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    I wasn't sure lol.. Thanks for clarifying it!
     
  14. FXchris305

    FXchris305 Member

    608
    0
    miami
    2005 Honda S2000
    Garages:
    1
    so the 5/16 give you more power on lower rpms . and the 1/2 give you more power on higher rpms?
     
  15. drew855

    drew855 Premium Member Premium

    1,128
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    NJ
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    Yea, pretty sure
     
  16. jbaker1121

    jbaker1121 Im in touch with humanity iS VIP

    8,929
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    Westchester, New York
    09 FX50
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    5/16 is more lower RPM, and the 1/2 is higher rpm. I got the 5/16th because I lost low end from my exhaust and stuff
     
  17. jumbosrule

    jumbosrule Premium Member Premium

    2,834
    57
    Redondo Beach, CA
    2003 FX35T
    Brad
    Garages:
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    Yes - 5/16 is better for low end.

    The difference between the two sizes is difficult to feel so you'll be happy with either one.

    You can still use your engine cover AND the Strut tower brace with either spacer.
     
  18. bleedingsujit

    bleedingsujit Premium Member Premium

    i have tried the iso thermal spacer and was thinking more about the copper version but frank's comments about them not very useful has got me thinking twice...:confused:
     
  19. sirtrojan

    sirtrojan Member

    424
    0
    Poland, Warsaw
    2006 FX35 AWD
    Garages:
    1
    I've just get the parcel with a 5/16 Plenum Spacer and gona install it within next few days (will share my opinion on IS :)
     
  20. jumbosrule

    jumbosrule Premium Member Premium

    2,834
    57
    Redondo Beach, CA
    2003 FX35T
    Brad
    Garages:
    2

    Yeah - I agree with Frank. Iso-thermal doesn't provide much benefit for the money. If money is not an issue, then it can't hurt. Just doesn't help very much.