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

What Is A Valve Job?

Discussion in 'Engine Building' started by SpyOneUSN, Mar 19, 2003.

  1. SpyOneUSN

    SpyOneUSN Senior Member

    Messages:
    108
    Likes Received:
    0
    Joined:
    Mar 13, 2003
    can someone explain to me what exactly a 4 or 5 angle valve job is and what benefits it does? im guessin it has to do wit air and fuel flow. is it worth the money if your building top end? how much do they run if it is?
     
  2. the angle job is the angle the valve seats on the cylinder head chamber. it's usually modified to produce good air/fuel flow efficiency.
     
  3. SpyOneUSN

    SpyOneUSN Senior Member

    Messages:
    108
    Likes Received:
    0
    Joined:
    Mar 13, 2003
    so is 4 better than 3? im guessin more angles equals better shit
     
  4. what they mean by 4 and 3 is the "DEGREE" they want to shave off the valve seating to modify air/fuel flow.
    from what i know but not sure, most b series sit on a 44* angle, and the valve face angle measures out of a 45* angle, a one degree difference. by shaving "4 or 3" degrees off, means shaving the valve seat "4 to 3" degrees out. So the stock angle of 44* would change out to 47 or 48 degrees depending on what you have shaved off. but the valve face angle has to be shaved out to be 1 degree higher than the valve seat. (be sure you have enough valve margin)
     
  5. saturn_boy96

    saturn_boy96 88 C1V1C 53D4N DR1V3R

    Messages:
    1,507
    Likes Received:
    1
    Joined:
    Dec 13, 2002
    Location:
    Sheridan, WY
    hey this is what i was told by my machinist. a three anlge valve job takes the usual one andgle on the valve and vale seat and cuts in two new ones- "3 angles". the purpose is to allow smoother air flow.

    i drew a pic, i know its retarded.
     
  6. saturn_boy96

    saturn_boy96 88 C1V1C 53D4N DR1V3R

    Messages:
    1,507
    Likes Received:
    1
    Joined:
    Dec 13, 2002
    Location:
    Sheridan, WY
    [​IMG]

    by the way i heard that almost all hondas already have a mild 3 angle job from the factory.
     
  7. ekPhred

    ekPhred Senior Member

    Messages:
    437
    Likes Received:
    0
    Joined:
    Nov 11, 2002
    yes, i also heard that from the factory they put a 3 angle job on it as well.
     
  8. machine

    machine Banned

    Messages:
    341
    Likes Received:
    0
    Joined:
    Jan 18, 2003
    Location:
    houston tx

    i do believe hes got it!
     
  9. EF9

    EF9 Junior Member

    Messages:
    9
    Likes Received:
    0
    Joined:
    Feb 15, 2003
    Does the valves need to machine to match the v.job??
     
  10. saturn_boy96

    saturn_boy96 88 C1V1C 53D4N DR1V3R

    Messages:
    1,507
    Likes Received:
    1
    Joined:
    Dec 13, 2002
    Location:
    Sheridan, WY
    usually the valves have the same angles cut into them and then they are "lapped" to the valve seat. lapping allows a total seal in the combustion chamber.
     
  11. SpyOneUSN

    SpyOneUSN Senior Member

    Messages:
    108
    Likes Received:
    0
    Joined:
    Mar 13, 2003
    nice arrows on the picture!
     
  12. saturn_boy96

    saturn_boy96 88 C1V1C 53D4N DR1V3R

    Messages:
    1,507
    Likes Received:
    1
    Joined:
    Dec 13, 2002
    Location:
    Sheridan, WY
    my question is, did it do the job?
     
  13. 93tegh22

    93tegh22 Junior Member

    Messages:
    28
    Likes Received:
    0
    Joined:
    Mar 24, 2003
    how dus it help you when u get a v.job
     
  14. SATURN BOY----> it is not lapped to the same degree, the seat is 44 degrees while the valve is 45 degrees, it has a 1 degree difference.
     
  15. saturn_boy96

    saturn_boy96 88 C1V1C 53D4N DR1V3R

    Messages:
    1,507
    Likes Received:
    1
    Joined:
    Dec 13, 2002
    Location:
    Sheridan, WY
    who told you that, i just want to know for my own knowledge. have you lapped vales before? i don't think the difference could be measured.
     
Verification:
Draft saved Draft deleted

Share This Page