User Tag List

Page 3 of 13 FirstFirst 12345 ... LastLast
Results 41 to 60 of 259

Thread: Blown engine theory

  1. #41

    Default

    Cheers...

  2. #42

    Default

    i dont think the 'engine of the year' had much more room to move is all.


  3. #43

    Default

    Your a sh|t stirrer...... You'll get our type in trouble again.....

  4. #44

    Default

    Quote Originally Posted by ChaMPS View Post
    Your a sh|t stirrer...... You'll get our type in trouble again.....
    just voicing an opinion

    havent heard of too many 300+HP xr5s blowing up now have we? hehe >
    <img src=http://i493.photobucket.com/albums/rr300/maniac747/tunedbytunehouse.jpg border=0 alt= />

    Peak Power output is for talking, torque is for winning.

    How's my posting? If you have a complaint Call: 1 800 555 BLWME

  5. #45

    Default

    Can't say we have.....

  6. #46

    Default

    ..but the gearboxes fall out?

    j.k

  7. #47

    Default

    Ha ha ha.... Nice.....

    Only if you use a Northern Canberra repair joint.....

  8. #48
    Join Date
    Nov 2008
    Location
    Craigieburn
    Age
    50
    Posts
    1,642
    Blog Entries
    1

    Default

    Currently looking into getting permission to re-post the content from MS forums. In the interest of keeping the thread from blowing out, if we could restrain ourselves to discussion relating to the symptoms, with minimum of banter would be appreciated, thanks.

    It's hard to get real statistics on issues such as this. How many modded cars go pop? Who'd know, really. Sometimes just being popular choice of vehicle could make it seem like there's more than there really is...

  9. #49

    Default

    I'd also like to see a definitive answer to whether the BSD has any effect on the probability of popping an engine. The discussions are spread far and wide and I don't think a clear picture has emerged yet. Some say BSD reduces the likelihood of failure, but there are BSD engines that have failed. If anyone has seen a clear trend let us know.

  10. Default

    Bsd???

  11. Default

    Balance shaft delete

  12. #52
    Join Date
    Jan 2009
    Location
    Coomera, Gold Coast
    Age
    41
    Posts
    3,565
    Blog Entries
    1

    Default

    I would have thought getting rid of the balance shaft would cause MORE problems...it is there to make sure the engine is balanced right...correct?

  13. #53

    Default

    Interesting question tric, and it opens up whole new can of worms. Some engines rely on a balance shaft to control fourth order harmonics so the engine stays together, but BSD proponents believe that Mazda only put it there for NVH reasons and it is otherwise detrimental to the engine for reasons such as interfering with oil distribution, placing a huge amount of drag on the crank (it's very heavy) and a few other reasons I can't remember.

    Not saying I agree, but that's the rationale.

    A while back some of the guys who have done this mod believed they were less likely to pop. But there's been a few failures of BSD engines since then and I'd be curious to know if it's affecting the probability.

    Gone to Volvo


  14. #54
    Join Date
    Jan 2009
    Location
    Coomera, Gold Coast
    Age
    41
    Posts
    3,565
    Blog Entries
    1

    Default

    Thats what I have read about it too, it frees up some weight. But that alone could cause issues, I have tried light weight flywheels on motorbikes and small 2 cylinder motors and have found cases where it actually spins too fast due to the lack of weight but a 4 cylinder car crank should be different...there is that magic word should

    I think at the end of the day the Mazda motor seems to be very temperamental, be it NA or Turbo.
    Not Gone...just "busy"
    Quote Originally Posted by Street Road Laino
    It's not blue screen of death Kent, it's Auora Blue screen of death

  15. #55
    Join Date
    Dec 2008
    Location
    Sydney
    Age
    49
    Posts
    1,834

    Default

    Quote Originally Posted by MaN|aC View Post
    just voicing an opinion

    havent heard of too many 300+HP xr5s blowing up now have we? hehe >
    Havent heard of too many XR5's putting down 300+ hp AT THE WHEELS either.

  16. #56

    Default

    I was gonna say that but I'm in enough trouble already.....

  17. #57
    Join Date
    Jan 2009
    Location
    Coomera, Gold Coast
    Age
    41
    Posts
    3,565
    Blog Entries
    1

    Default

    @ kmh001

    This is actually a good thread once you get rid of the b!tching and its great to know that we have some good minds on here till fill in gaps with information and what not

  18. #58

    Default

    The balance shaft also places an angular load on the crank due to the angle of the gears that are cut.


    Thats theory one.


    But its a lot less force than pushing the clutch pedal down to shift, not many people think of that though...

    Maybe its a sh!tty thrust bearing clearance issue.. i just don't buy this oil hydro lock idea.. If that were the case we would be seeing a lot of blue smoke at random vacuum ranges..

    The other idea is that the crank tends to walk a little due to the thrust bearing, and at a certain point will lock up the BS. Boom boom

    But this shouldn't cause bent rods..

    SO im lost

    Ahh i just don't know

    Doc
    Last edited by Doc; 06-05-2009 at 02:59 PM. Reason: typo

  19. Default

    What happened to the rat in the hat Doc? And what is that dog shooting up?

  20. #60
    Join Date
    Nov 2008
    Location
    northside
    Age
    34
    Posts
    7,812

    Default

    Quote Originally Posted by Cosmic3MPS View Post
    What happened to the rat in the hat Doc? And what is that dog shooting up?
    Same rat...just been injecting way too many hormones..and with a head like that who needs a helmet??


    My bad...sorry Nexus...off topic banter

Page 3 of 13 FirstFirst 12345 ... LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •