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

i tried searchin' but I can't find any help...

Discussion in 'Engine Building' started by ahedau, Jan 21, 2005.

  1. ahedau

    ahedau Senior Member

    Messages:
    647
    Likes Received:
    0
    Joined:
    Nov 24, 2002
    Location:
    Middle GA
    I have a bare B20b block (freebie)

    I'm buying a '95 LS motor/tranny swap for my '92 VX HB. I have been sticking to my SOHC Z6 to stay in a competetive class in auto-x. However, the SCCA has just put ITR's in my class & won't move the damned Fiat X 1/9 that OWN DSP but I digress...

    Is there any reason why I wouldn't want to frankenstien the LS head onto the B20 block until I can find/afford an ITR head/tranny?

    If so, I would put the phk pistons on the B20b rods AND bore it .040 over to 85mm with a 2-layer head gasket. I guess the P75 ECU (??). According to this that would give me almost exactly 10:1 cr. Should be a pretty damn torquey non-VTEC motor. Since I auto-x not drag, that should be fine for SM class until I can get the better flowing head and closer ratio tranny.

    What are the draw backs/advantages in ya'lls opinion? Any interference problems with those pistons and that head combo?
     
  2. brian11to1

    brian11to1 Senior Member

    Messages:
    9,203
    Likes Received:
    21
    Joined:
    Jan 9, 2003
    Its basically a direct replacement. There's really no gains or disadvantages other than the fact the 2000-2001 LS heads have bigger Intake Ports and better cams...

    Brian
     
  3. ahedau

    ahedau Senior Member

    Messages:
    647
    Likes Received:
    0
    Joined:
    Nov 24, 2002
    Location:
    Middle GA
    thanks....


    anyone else?
     
  4. brian11to1

    brian11to1 Senior Member

    Messages:
    9,203
    Likes Received:
    21
    Joined:
    Jan 9, 2003
  5. ahedau

    ahedau Senior Member

    Messages:
    647
    Likes Received:
    0
    Joined:
    Nov 24, 2002
    Location:
    Middle GA

    lol :lol: figures...
     
  6. xj0hnx

    xj0hnx I wanna be sedated VIP

    Messages:
    14,172
    Likes Received:
    48
    Joined:
    Nov 10, 2002
    Location:
    C.C.TX.
    What does figure is if this was in the right forum it might get more responses.
     
  7. ahedau

    ahedau Senior Member

    Messages:
    647
    Likes Received:
    0
    Joined:
    Nov 24, 2002
    Location:
    Middle GA
    thanks for the move. I assumed since SWAP RELATED QUESTIONS ONLY was in bold, this is where I should have posted it.
     
  8. xj0hnx

    xj0hnx I wanna be sedated VIP

    Messages:
    14,172
    Likes Received:
    48
    Joined:
    Nov 10, 2002
    Location:
    C.C.TX.
    Right, swap related goes where this was. You are asking about building an engine, hence it goes in the engine building forum, sweet huh?
     
  9. ahedau

    ahedau Senior Member

    Messages:
    647
    Likes Received:
    0
    Joined:
    Nov 24, 2002
    Location:
    Middle GA


    what would be sweet is if I could only find someone wise enough to answer the question.
     
  10. projectxspeed

    projectxspeed Senior Member

    Messages:
    1,380
    Likes Received:
    0
    Joined:
    Nov 5, 2003
    Location:
    New Hampshire
    Don't worry, I'll save you (aka) answer your questions instead of feeling better about myself for flaming you.

    - There is no reason you can't use an LS head on your b20 until you find a ITR head.
    - I would not bore the b20 since the cylinder walls are weak.
    - The only draw back is that you will spend money on a head that you are going to replace, so its kinda a waste. There will not be any interference problems with the pistons or head combo.
     
  11. ahedau

    ahedau Senior Member

    Messages:
    647
    Likes Received:
    0
    Joined:
    Nov 24, 2002
    Location:
    Middle GA


    However, I have been convinced that I need to build the motor once. I do not want to wait but my arm is being twisted really hard.
     
  12. xj0hnx

    xj0hnx I wanna be sedated VIP

    Messages:
    14,172
    Likes Received:
    48
    Joined:
    Nov 10, 2002
    Location:
    C.C.TX.
    But the question was pretty much answered.
     
  13. pissedoffsol

    pissedoffsol RETIRED

    Messages:
    49,693
    Likes Received:
    54
    Joined:
    Sep 28, 2002
    Location:
    Retirement Home
    ls and b20 heads are 99.8% identical. brian11to1 pretty much summed it up.

    b20b/z blocks are the weakest honda blocks made (recently anyway), due to their sleeve design.
     
  14. ahedau

    ahedau Senior Member

    Messages:
    647
    Likes Received:
    0
    Joined:
    Nov 24, 2002
    Location:
    Middle GA


    so I should "just say no" to boost? Fine for now. If I want to boost I'll build up he B18 block.
     
  15. projectxspeed

    projectxspeed Senior Member

    Messages:
    1,380
    Likes Received:
    0
    Joined:
    Nov 5, 2003
    Location:
    New Hampshire
    It depends on your power goals. The b20b will be fine if you stay low on the psi with a medium sized turbo. But more than anything make sure you have a REAL Engine management system. so you can properly tune your system.
     
  16. brian11to1

    brian11to1 Senior Member

    Messages:
    9,203
    Likes Received:
    21
    Joined:
    Jan 9, 2003


    You seem pretty much set on building once. Then if you want to run higher boost... sleeve the block. Benson, Dart, Darton, Golden Eagle... get it sleeved. If you have any more questions, shoot me a PM.

    Brian
     
Verification:
Draft saved Draft deleted

Share This Page