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#1
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bang under hard braking and launching
hi all
my car has done this for ever, and i remember seeing a thread about it previously. From time to time, not every time if i launch my car or jump on the brakes really hard - i.e. abs going off i get a really solid bang from under the car. now I'm pretty sure it is either the engine or transmission hitting the underside of the car, but i am just wondering what does it and what the solution is - i.e. stiffer engine/trans mounts or is it the dog bone mount that isn't stiff enough any ideas and no there are no broken mounts etc, and it is not a suspension or brake noise but more a super solid bang when the car is jumping around. cheers Tom
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Version 6 STI |
#2
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Rear subframe bushes look ok?
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[CENTER][SIGPIC][/SIGPIC][/CENTER] [CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER] |
#3
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Rear subframe has no bushes, locked solid to the chassis, but the bang is defiantly from the front, like under the drivers feet towards the centre. I have never been able to see any marks etc under the car but i read somewhere on pwrx about this before.
You have to either have serious hopping in the front when launching or be under super hard abs braking, where the car jumps around, so not under normal driving..
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Version 6 STI |
#4
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checked your lower control arm rear bushes?
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#5
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You are rather...umm ...agressive on your car Mr Trembarth!!
It could be the intercooler hitting something (eg strut brace?) ...my '06 STI used to do that before we put Group N engine mounts in...it's also worth while putting the Group N gearbox mount in...
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No Subarus currently owned |
#6
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Quote:
Where did you get the group n mounts from?
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Version 6 STI |
#7
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Quote:
using the Perth-WRX mobile app
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Slow is smooth and smooth is fast. |
#8
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Could be weak transmount i have never changed it although its not broken. Feels more to the front of the car though, feels more firewall, could be the intercooler
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Version 6 STI |
#9
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Seems I now have the same issue......I'm thinking either G/box mount or Pitch stopper in my case.
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[CENTER][SIGPIC][/SIGPIC][/CENTER] [CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER] |
#10
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Had this before, turns out its the bolt holding control arm coming loose a bit (it needs quite a bit effort to tighten it to spec). If u have h brace, u might wanna check it. Other wise, maybe swaybar links?
using the Perth-WRX mobile app
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MY08 STI 422whp at 1.5bar on E85, built by Diversion Garage, assembled and tuned by EvoR Update from new owner: 375whp at 1.4bar on 98, at Tokyo Motorsport Last edited by s20525xxx; 01-04-2014 at 11:34 PM. |
Tags |
bang, braking, hard, launching |
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