Page 1 of 3 1 2 3 LastLast
Results 1 to 10 of 25

Thread: Toyota 86 + Forced induction = BOOOOOOOOOOM!

  1. #1
    Noooob
    Join Date
    Jun 2010
    Name
    Matt
    State
    NSW
    Location
    Campbelltown
    Country
    Australia
    Posts
    5,246

    Default Toyota 86 + Forced induction = BOOOOOOOOOOM!

    The guys at NRG Automotive have released pictures of the Turbo charged GT86 that had 3500kms on the clock before it let go.



    The pictures tell allot of this build, but by the sounds of it the rod snapped sending the piston into the valves bending them and punching a hole in the block.












    The valves sitting up here..



    What is left of the piston



    Busted Rod






    Please show your appreciation for the pics and like the NRG facebook page

    Ae86 Drivingclub - Toyota AE86 Car Club where AE86 | KE70 | Toyota 86 / GT86 | Subaru BRZ | Scion FRS owners

  2. #2
    Senior Member AIROCOBRA's Avatar
    Join Date
    Apr 2009
    Name
    Bob
    State
    ACT
    Location
    Weston
    Country
    Australia
    Posts
    343

    Default

    Here is the thing ---- maybe these engine are not designed to be boosted , well no as much as this one , whatever it was. Sort of looks like someone got something really wrong , that is one hell of a failure !!!!!!!!!!!!!!!!!
    ONLY THE GOOD DIE YOUNG ------ I MUST BE VERY VERY VERY BAD

    AE86 4AGE 16V N/A TRACK CAR ( RED )
    AE86 ROLLING SHELL --- IN CASE i F-CK UP !!!!!! (PRIMER )
    AE86 ADM UNDER CONSTRUCTION ( STREET CAR) 4AGE 16V , (RED )
    AE86 Trueno ( RESTORE TO PERIOD GOODNESS ) White
    AE86 4AGZE Wreck ( to be rebuilt into Khannacross fun car )
    KE 15 x 2 -- SPRINTER ( RESTORE TO PERIOD GOODNESS ) RED
    TE72 (T18) X 2 BIT OF PAINT , BIT OF MECHANICAL way we go RED
    Soarer 1995 1JZ Factory 5speed (R154 )

  3. #3
    Moderator Frak's Avatar
    Join Date
    Dec 2008
    Name
    Jamie
    State
    SA
    Location
    Adelaide
    Country
    Australia
    Posts
    1,324

    Default

    Just on this, I have dynoed an 86 and was shocked at the mid range dip in the torque curve BUT whilst at manufacturers training on this engine, noticed that the oil pump has a variable pressure delivery and in the area where the torque is lower, the pressure from the pump is also quite low, about 25psi from memory and then as the rpm rises it increases to 60/70psi( the pressure was also higher below the torque dip as well), I showed the trainer the power/torque curve, overlaid it over the pump pressure delivery curve and then started wondering what will happen when torque is increased in this range and oil pressure is not, what will happen????? I imagine bearing problems! It will be interesting to see if up graded pumps come out that do not have the variable pressure delivery from aftermarket tuners, or if we see a run of modified 86'ers running bearings or throwing rods!
    Hachiroku since 1994

    Quote Originally Posted by LittleRedSpirit View Post
    When i grow up I wanna be just like Uncle Frak Frak.

  4. #4
    Veteran Konakid's Avatar
    Join Date
    Dec 2008
    Name
    Henry
    State
    SA
    Location
    Eastern
    Country
    Australia
    Posts
    4,752

    Default

    Frak why would they run a variable pressure pump in the first place?

    With a big turbo the motor could come on boost hard right where the oil pressure is low.
    RT142 Estate.

    AJPS.

  5. #5
    Senior Member hachirusto's Avatar
    Join Date
    Dec 2008
    Name
    Jay
    State
    VIC
    Location
    Melbourne
    Country
    Australia
    Posts
    695

    Default

    What sort of boost was the engine seeing in this instance?
    Rust is a way of life

  6. #6
    Junior Member
    Join Date
    Aug 2013
    Name
    brett
    State
    NSW
    Location
    Sydney
    Country
    Oz
    Posts
    2

    Default

    I think the above question will help us all here.
    BOOST?
    Who tuned it?
    With what?
    We have done many turbo and supercharged kits now and yes we are aware of faults and failures.
    Thankfully none by us.
    BUT yes there is a risk with ANY mod on ANY car

  7. #7
    Noooob
    Join Date
    Jun 2010
    Name
    Matt
    State
    NSW
    Location
    Campbelltown
    Country
    Australia
    Posts
    5,246

    Default

    I'd love to see the top of that piston, that would tell us much more about what was wrong with the tune if anything. But given compression ring was sitting in the sump when it was pulled of it is safe to assume some form of detonation was present.

    Find it interesting that "This is what failed causing the problem other end was still connected to the crank and big end bearings still servicable" quoted from their facebook page when referring to the snapped rod.
    Ae86 Drivingclub - Toyota AE86 Car Club where AE86 | KE70 | Toyota 86 / GT86 | Subaru BRZ | Scion FRS owners

  8. #8
    Veteran Jimmee1990's Avatar
    Join Date
    Mar 2011
    Name
    James
    State
    VIC
    Location
    Mt Dandenong
    Country
    Australia
    Posts
    1,132

    Default

    Possibly boost causing the rod to fail under compression perhaps? On another note, I'm very interested as to why they would run a variable pressure oil pump? A small fuel economy benefit perhaps from less drag?

  9. #9
    Veteran
    Join Date
    Dec 2008
    Name
    John
    State
    TAS
    Location
    Hobart
    Country
    Australia
    Posts
    2,200

    Default

    Pretty certain I've seen the oil pump problem mentioned elsewhere that Frak touched on...I do also recall seeing a "modified" oil pump for them in my interwebz trawling...

  10. #10
    Moderator Frak's Avatar
    Join Date
    Dec 2008
    Name
    Jamie
    State
    SA
    Location
    Adelaide
    Country
    Australia
    Posts
    1,324

    Default

    This was my first thought.
    Hachiroku since 1994

    Quote Originally Posted by LittleRedSpirit View Post
    When i grow up I wanna be just like Uncle Frak Frak.

Page 1 of 3 1 2 3 LastLast

Similar Threads

  1. Toyota 86 Forced Induction issues... Turbo Charging vs Supercharging My GT86
    By pizzaeater in forum GT86 / BRZ Technical Questions / Modifications
    Replies: 30
    Last Post: 3rd November 2014, 03:44 PM
  2. MRT review Toyota 86 vs Scion FRS vs Toyota 86
    By Matt in forum Info / Pics & Discussion
    Replies: 1
    Last Post: 2nd December 2012, 08:19 PM
  3. CROWER 4AGE Forced induction cam specs
    By kerola in forum Technical - Questions
    Replies: 14
    Last Post: 15th September 2010, 10:51 AM
  4. What head is best for forced induction (supercharger)
    By PRIMRK in forum Technical - Questions
    Replies: 8
    Last Post: 15th July 2010, 11:12 PM

Posting Permissions

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