How to destroy an engine

Discussion in 'Mechanic and Repair' started by Dirty Water, Dec 1, 2005.

  1. Dirty Water

    Dirty Water LawnSite Fanatic
    Posts: 6,794

    Step 1: Take a stock Mazda V6.

    Step 2: Add 25 psi of turbocharged fury.

    Step 3: Go lean.

    To be fair, it survived over 50 1/4 mile passes and 35 dyno pulls. (11.05 at 125 best time...not bad for a FWD).

    Carnage:

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    I'd say the oddest thing is the wristpin through the top of the piston.
     
  2. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,022

    That thing looks just like one of them high dollar self draining boat anchors ;)
    It's gotta be one of the worst implosions I've ever seen, Did it lite up when it went ?
     
  3. stumper1620

    stumper1620 LawnSite Bronze Member
    Posts: 1,889

    YUP! I'd say that pretty much took care of that.
     
  4. lawnmaniac883

    lawnmaniac883 LawnSite Silver Member
    Posts: 2,613

    What makes you think that engine is destroyed?
















































    LOL!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
     
  5. Dirty Water

    Dirty Water LawnSite Fanatic
    Posts: 6,794

    Rob, its not my engine, its another guy a online car club I belong too. I had one, but I stayed at a pretty moderate boost (15 psi).

    This engine dynoed just a hair over 500 whp. Damn impressive for 2.5 litres.

    Here is a video of the run he blew it on. Its from inside, but you can see the engine smoke come in the cab when it goes.

    http://s91196822.onlinehome.us/finaly.wmv

    Gotta love hearing that turbo whistle.
     
  6. TClawn

    TClawn LawnSite Silver Member
    Posts: 2,036

    wow.

    I've never seen an engine that shredded. what are those silver things? metal shavings?
     
  7. Dirty Water

    Dirty Water LawnSite Fanatic
    Posts: 6,794

    Those are pieces of piston #6.

    It was completely gone.

    Piston #5 had the wristpin tear out of the rod and go through the piston...very odd.

    You can see that here:

    [​IMG]
     
  8. TClawn

    TClawn LawnSite Silver Member
    Posts: 2,036

    ok, so how did the shavings get on top of the engine?

    what was the probable cause of failure? to high rpms with too much boost?
     
  9. Dirty Water

    Dirty Water LawnSite Fanatic
    Posts: 6,794

    They aren't, your looking at the block upside down. The oil pump, block stiffener and main caps have been removed in the rest of the pictures. The one with a ton of shavings was what he saw the moment he took the oil pan off.

    The heads are already off.

    Cause of failure was massive predetonation due to not enough fuel per amount of air entering.

    Basicly, the cylinders all fired out of order.
     
  10. Dirty Water

    Dirty Water LawnSite Fanatic
    Posts: 6,794

    I'm waiting for Uniscaper to come in and say you can't make any power out of small displacement engines :)
     

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