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

Rod/Sroke Ratio damage

Discussion in 'Engine Building' started by uberdog, Feb 18, 2005.

  1. uberdog

    uberdog Junior Member

    Messages:
    22
    Likes Received:
    0
    Joined:
    Dec 27, 2004
    Lots of criticisim of building Frank motors and how the rod ratio of the b18 isn't suited to the high output but does anyone have a tear down report after some miles have been put on one of these builds. What was noticed about wear and tear or is the whole gripe just a mathmatical/hypothetical argument based on common knowledge about ideal ratios?
    Another words, anyone have any proof of poor endurance/wear characteristics of the crv ls vtec build?
     
  2. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

    Messages:
    28,465
    Likes Received:
    228
    Joined:
    Sep 30, 2002
    Location:
    Dallas / Fort Worth, TX
    Total bullshit.... the rod/stroke of an LS/VTEC is 1.539, and the GSR has a ratio of 1.581. After 45k miles, the piston skirts and walls in my B20/VTEC were in very good shape. Build it properly and it'll last a LONG time.
     
  3. AllMotorMonster

    AllMotorMonster Senior Member

    Messages:
    542
    Likes Received:
    0
    Joined:
    Oct 13, 2002
    Location:
    Inland Empire foo!



    Although many people believe it's not ideal to rev a B18/20 to high rpm because it causes damage, there are many factors that are involved before making such an arguement.

    As Calesta mentioned, no problems with the skirts, this is very true. However, there is more.

    If you keep the factory rod bolts, and take your LS-CR/VTEC over 8,000 RPM on a regular basis, you'll be replacing your engine shortly. The rod bolts have a nasty habit of stretching and then breaking past 8k.

    The factory rods in the LS/CRV are very weak. Stronger than say a D16, but not as strong as factory GSR/ITR rods. These can also break under high heat and heavy loads.

    So if you're going to do it right, spend some time researching the facts and get the right parts so you can enjoy your engine for a long time to come.
     
  4. uberdog

    uberdog Junior Member

    Messages:
    22
    Likes Received:
    0
    Joined:
    Dec 27, 2004
    Thanks guys
    Calista, just out of curiosity, why did you tear into your crv/vtec after 45,000 miles?
     
  5. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

    Messages:
    28,465
    Likes Received:
    228
    Joined:
    Sep 30, 2002
    Location:
    Dallas / Fort Worth, TX


    Calista = super skinny actress that got jiggy with Harrison Ford
    Calesta = evil demon type character that feeds on people's suffering = my account name

    :eek: :)

    I got bored.

    No.

    I overrevved on a downshift and broke my ring lands loose on a piston. It was 100% my fault, not the engine's.
     
Verification:
Draft saved Draft deleted

Share This Page