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a70 rear subframe strengthening


#1 User is offline   jzma70 

  • L Plater
  • Group: Members
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  • Joined: 13-September 08
  • Car:1988 1jz ma70
  • Induction:twin turbo
  • Color:red
  • Power (rwkw):about 180

Posted 10 January 2012 - 06:06 PM

hey guys, ive been on forums a while, but i dont say much on here.

you obviously know mk3s have very weak rear subframes, ive broken 3 and onto my fourth, now im gettinng one reinfrorced by an experienced engineer at my work. i will post pictures up to show you what he is doing.

he is grinding the fins off my diff and making a bracket under the subframe that will bolt in place, he will cut out the bolt holes where the diff mounts upwards at the pinion and weld threaded rods through the length of the subframe for better support.

he will also strengthen the other 4 mounting spots with 4 mm plate or better. considering the frame only weighs 30 ish kg its pretty light and structually weak.

now i dont know how much he wants for the strengthening but im sure it will be reasonable, i can get one pre done so then i can recieve your old frame and start again let me know.

dan


#2 User is offline   ma61turbo 

  • Technical Moderator
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  • Location:Adelaide
  • Car:1998 JZA80 RZ
  • Induction:Turbo
  • Color:Black!
  • Power (rwkw):233

Posted 10 January 2012 - 06:52 PM

Hrmm, there used to be a big thread about this over on the national forums. Strengthening of the subframe has been done by a few over there and possibly HKS_TRD(not sure if he uses the forums here much anymore) may have done it also. Might want to check over there to see what results have been had.


#3 User is offline   Gordo 

  • BPU Supra
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  • Posts: 388
  • Joined: 22-February 10
  • Car:89 GA70 Supra
  • Induction:Twin Turbo
  • Color:White

Posted 16 January 2012 - 09:49 PM

got the photo's yet dan. i want to see :)


#4 User is offline   Gordo 

  • BPU Supra
  • Group: Financial Member
  • Posts: 388
  • Joined: 22-February 10
  • Car:89 GA70 Supra
  • Induction:Twin Turbo
  • Color:White

Posted 17 January 2012 - 09:56 PM

just to help people out, here's a photo of the finished product

http://www.facebook....&type=1

has the new front lower brace and mounting point heavily beefed. then all the rear points have extra thickened metal added

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