1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

which is a better head to use?

Discussion in 'Engine Building' started by wannaberacer, Feb 25, 2004.

  1. wannaberacer

    wannaberacer Member

    Messages:
    89
    Likes Received:
    0
    Joined:
    Nov 16, 2002
    I'm buiding up a honda challenge car that currently has a gsr motor in it. I'm only allowed factory parts for the whole car except for heads/cams, which are completely free. so my question is this, I know that there are differences between the b16 head and gsr head, but which would be a better choice to send off to a head $hop to get built. Also, anyone know which intake manifold is better between the CTR and ITR (if there is a difference)? And anyone have experience with going too aggressive on factory throttle bodies and manifolds??? I really need to know flow numbers for these things, but some input would help. :-D
     
  2. JDMilan

    JDMilan Senior Member

    Messages:
    6,730
    Likes Received:
    0
    Joined:
    May 11, 2003
    Location:
    Boca Raton, FL
    gsr head flows a "tad" more low to midrange

    itr/pr3/b16 head flows a "tad" more up top
     
  3. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

    Messages:
    30,036
    Likes Received:
    3,970
    Joined:
    Sep 28, 2002
    Location:
    CT
    :concur:

    the difference is not enough to base a decision off of ... get whatever you can get
     
  4. Iquark

    Iquark Senior Member

    Messages:
    272
    Likes Received:
    0
    Joined:
    Dec 16, 2002
    Location:
    Mount Vernon, WA

    However, if he is looking to use a CTR or ITR intake mani, doesn't he have to go with the B16 head???
     
  5. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

    Messages:
    30,036
    Likes Received:
    3,970
    Joined:
    Sep 28, 2002
    Location:
    CT

    yes ... but you could just get the skunk2... its a copy of the ITR manifold
     
  6. 97CTR

    97CTR Senior Member

    Messages:
    745
    Likes Received:
    0
    Joined:
    Jul 10, 2003
    if you are sending out the head to get built, then just get the cheaper PR3 b16 head. The flow rate differences are minimal and unimportant if you are getting it built. By "built" I am assuming port and polish and valve job, cams, etc.
     
  7. wannaberacer

    wannaberacer Member

    Messages:
    89
    Likes Received:
    0
    Joined:
    Nov 16, 2002
    yea, the manifold thing is a problem. I need to use honda only parts, so that means either I sell my gsr head and pick up a b16 one, or I mod the intake manifold. So anyone know how hard it is to modify the intake manifolds on these things :p??
     
  8. ef9civicgen4

    ef9civicgen4 Senior Member

    Messages:
    603
    Likes Received:
    0
    Joined:
    Apr 15, 2003
    Location:
    Independence MO
    if you want a type r mani, go to optionsauto.com, they should have one. and if you want all honda parts, i suggest you make some friends at the dealership so they can cut you deals.
     
  9. wannaberacer

    wannaberacer Member

    Messages:
    89
    Likes Received:
    0
    Joined:
    Nov 16, 2002
    anyone know if I can modify an ITR manifold to go on a gsr head???
     
  10. wannaberacer

    wannaberacer Member

    Messages:
    89
    Likes Received:
    0
    Joined:
    Nov 16, 2002
    and also, does anyone know if ITR rods will be happy under racing conditions at around (and no more) than 10kRPM????
     
  11. 97CTR

    97CTR Senior Member

    Messages:
    745
    Likes Received:
    0
    Joined:
    Jul 10, 2003
    if you want to rev to 10k you should not be road racing, only super cams like toda D or JUN4 can even come close to making power around 10k. In other words, why rev to 10k when your power starts to drop at 8500. High revs is not always the answer, but it is fun.
     
  12. GSRCRXsi

    GSRCRXsi Super Moderator Moderator VIP

    Messages:
    9,623
    Likes Received:
    345
    Joined:
    Nov 13, 2002
    Location:
    MD

    i think its possible, but ALOT if modification, just get the b16 head to use the ITR manifold.

    get some CTR pistons too, will give you a good bit of compression :) .

    and i wouldnt trust the internals at 10k rpms.
     
  13. wannaberacer

    wannaberacer Member

    Messages:
    89
    Likes Received:
    0
    Joined:
    Nov 16, 2002
    <_< well that really upsets me that I have to sell the gsr head for a pr3 one, but such is life. And about the interals, the head is free, I can use whatever cams and trinkets I desire. Its just about the bottom end being of factory parts. I think what I might do is use .040 CTR pistons and have my head shop redo the combustion chamber for higher compression. Also, I was asking about the rods because I want an idea of what profiles to use for my motor.
     
Verification:
Draft saved Draft deleted

Share This Page