I had noticeable twist in my 180 when delivering pizzas; if I was on an angle, the hatch wouldnt latch shut (it was moved a few mm across).
Putting in a rear strut brace fixed that though
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| chassis twist? https://silviansw.com/forum/viewtopic.php?f=4&t=28658 |
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| Author: | blue180 [ Thu Oct 04, 2007 11:39 pm ] |
| Post subject: | chassis twist? |
hey guys, does anyone here experience their car twisting and creeking when going up a driveway sideways? ive got a set of JIC coilovers, hks strut bars, b-pillar floor brace and fulcrum nolathane bushes all round and when i go up my driveway sideways, the interior starts to creek. it sound like its coming from the sunroof and rear hatch. is this normal or is my chassis stuffed? |
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| Author: | chris86 [ Thu Oct 04, 2007 11:44 pm ] |
| Post subject: | |
cars are made of mild steel. The idea behind that is that when they crash into something they will twist and crumple to absorb the energy in the hope of saving a few lives. The chassis of your car is made of mild steel I think so its normal for it to flex a little bit although you shouldn't be able to hear it. Does it sound like metal twisting or more like plastic or rubber rubbing? |
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| Author: | Arkhaeon [ Thu Oct 04, 2007 11:50 pm ] |
| Post subject: | |
I had noticeable twist in my 180 when delivering pizzas; if I was on an angle, the hatch wouldnt latch shut (it was moved a few mm across). Putting in a rear strut brace fixed that though
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| Author: | blue180 [ Thu Oct 04, 2007 11:58 pm ] |
| Post subject: | |
its more of the interior trims and i think the seal around the hatch. but definately the interior trim. |
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| Author: | MAXBOOST [ Fri Oct 05, 2007 12:49 am ] |
| Post subject: | |
Never tried opening your doors when one end of the cars jacked up? Cars bend. -Mitch |
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| Author: | Nebuchernezzer [ Fri Oct 05, 2007 1:05 am ] |
| Post subject: | |
Yes they bend and creak. Strut braces suprisingly stop alot of it (I was suprised!). My new 180sx has every bolt on brace known to man (7 point cage, strut braces, castor rod bracket brace, trans tunnel brace and rear chassis rail brace), it's not to bad stiffness wise... |
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| Author: | Serial Killa [ Fri Oct 05, 2007 9:26 am ] |
| Post subject: | |
MAXBOOST wrote: Never tried opening your doors when one end of the cars jacked up?
Cars bend. -Mitch Even my 15 bends when up on jacks, doors open funny.. |
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| Author: | fergo308 [ Fri Oct 05, 2007 10:52 am ] |
| Post subject: | |
my wagon has VERY bad chassis flex. jack up one corner and you can barely open the doors. that's to be expected though,given the very open body design and lack of cross bracing... vans are even worse. I still can't believe the number of complaints we used to get when I was working at toyota for creaks and rattles in taragos. they had sliding doors on both sides,and two normal front doors,plus the huge tailgate....hello!!! not much body there to resist flexing!!! if flex really bothers you,you could always go for a weld-in full cage. you won't have much after that's installed... 
Justin... |
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| Author: | Zac [ Fri Oct 05, 2007 1:58 pm ] |
| Post subject: | |
Yes a cage does the trick. I never realised how much the 180 flexed, but now with a cage in it and a heap of other bracing, its rock solid and super rigid. So rigid that its stuffs all your suspension settings up |
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| Author: | andy's-s13 [ Fri Oct 05, 2007 2:08 pm ] |
| Post subject: | |
i agree aswell (all above) strut braces help i dont have the squeeks and twists like before |
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| Author: | fergo308 [ Fri Oct 05, 2007 3:35 pm ] |
| Post subject: | |
it'd be more like it now allows the suspension to work properly,so your previous settings that were attempting to compensate for the flexing are now incorrect. Justin... boosted_n13 wrote: Yes a cage does the trick. I never realised how much the 180 flexed, but now with a cage in it and a heap of other bracing, its rock solid and super rigid. So rigid that its stuffs all your suspension settings up
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| Author: | blue180 [ Sat Oct 06, 2007 12:45 am ] |
| Post subject: | |
phew! i thought my car was falling apart! lol. is there much of a stiffness difference bewteen a bolt-in cage and a weld-in? |
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| Author: | fergo308 [ Sat Oct 06, 2007 1:01 am ] |
| Post subject: | |
is there a difference between tieing up your shoelaces,or just slipping your shoes on? it's not quite as pronounced as that,but yeah,welded in is stronger. bolted in is held by the mounting plates on the floor only and is primarily for safety. welded in is attached to the floor AND the pillars directly and increases occupant safety as well as improving the overall rigidity of the shell as a whole significantly more than a bolt in cage can as it has more support and connection points to the shell. the downside to welded in is the difficulty of removal should that need arise later. one other plus of welded in is that you can design the cage to your exact needs,whereas a bolt in is generally an off-the-shelf item,of someone else's design,which may or may not suit you perfectly. my project AE86 has a welded in half cage,with extras. dollar for dollar,there's no way I'd go for a bolt in. my cage is exactly what I specified,with several extra little additions to the shell,and cost me $1200. for that I got a 6point half cage (main hoop,two rear points,diagonal cross bar and harness bar),with an extra bar and plating reinforcement between the shock towers,the front strut tops stitched up,and additional bracing plates welded in at the base of the firewall where it meets the rails. the only reason I opted for a half cage over a full design as I wouldn't fit into the car with the front bars in place. a full cage is superior,but is more costly,and you may have the same problem I do - adequate occupant clearance. if you're at the point with a car that you're considering caging it,you may as well go the whole hog and do it the best way the first time. Justin... |
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| Author: | JayS14 [ Sat Oct 06, 2007 1:02 am ] |
| Post subject: | |
Nebuchernezzer wrote: My new 180sx has every bolt on brace known to man (7 point cage, strut braces, castor rod bracket brace, trans tunnel brace and rear chassis rail brace), it's not to bad stiffness wise... Do you have a pic of your rear chassis rail brace, ive been thinking of makeing one for some time.
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| Author: | Nebuchernezzer [ Sat Oct 06, 2007 3:44 am ] |
| Post subject: | |
Only these pics, I can take a better one if you like. 
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