Jump to content
SAU Community

Suspension Soft & Bouncy After Motor Change

boostdef
 Share

Recommended Posts

boostdef Enthusiast

boostdef

Posted
Posted

Hi,

Can anyone tell me whats going on? I have just changed the motor in an R33 gtst which has khoni adjustables at the front, and the from suspension is extremely soft and bounces like a boat in waves as im driving along.

I did not touch the suspension at all, just a simple jack the car up, change the motor and put it back down?? wtf?

Any help would be greatly appreciated :blink:

nisskid Grand Master

nisskid

Posted
Posted

sway bars still connected properly? dont think u need to take them off to change the engine, but it does go near to the sump so its possible. also did u have a strut brace on before? not usually a noticeable "handling" difference, mostly a mid-corner grip thing.

also was it a straight engine swap? u didnt put a heavier engine in did u?

boostdef Enthusiast

boostdef

Posted
  • Author
Posted
sway bars still connected properly? dont think u need to take them off to change the engine, but it does go near to the sump so its possible. also did u have a strut brace on before? not usually a noticeable "handling" difference, mostly a mid-corner grip thing.

also was it a straight engine swap? u didnt put a heavier engine in did u?

Straight engine swap by replacing a S1 motor with a S2 motor.I dont recall at all undoing any sway bars. Was pretty much engine mounts, bellhousing bolts and the little things here and there and that was it.The shocks i think are khoni adjustables with a bolt at the top, and i think a something to adjust underneath.Its just like they are now ultra soft and i go over 1 bump and the front goes up and down constantly for about 10 seconds. Plus, it is bottoming out a lot more obviously due to the softness :(Can I simply adjust them at all? Is it the top bolt i adjust or underneath? (Sorry new to this)

boostdef Enthusiast

boostdef

Posted
  • Author
Posted
Didnt drop the engine in to hard and bust the seals in the shocks did you?

Naa it all seemed smooth as! Dropped it in extremely carefully. But I suppose thats a possibility I may have done something.Another thing I forgot to mention is they are Coilover types i think. Ones with the adjuster at the bottom of the spring and the bolt at the top. Can it simply be a case of stiffening the spring? (Not that it explains what the go is though :P)

nisskid Grand Master

nisskid

Posted
Posted
Straight engine swap by replacing a S1 motor with a S2 motor.I dont recall at all undoing any sway bars. Was pretty much engine mounts, bellhousing bolts and the little things here and there and that was it.The shocks i think are khoni adjustables with a bolt at the top, and i think a something to adjust underneath.Its just like they are now ultra soft and i go over 1 bump and the front goes up and down constantly for about 10 seconds. Plus, it is bottoming out a lot more obviously due to the softness :(Can I simply adjust them at all? Is it the top bolt i adjust or underneath? (Sorry new to this)

sounds like ur shocks are buggered for some reason, are they on full hard adjustment wise?

boostdef Enthusiast

boostdef

Posted
  • Author
Posted
sounds like ur shocks are buggered for some reason, are they on full hard adjustment wise?

The bottom coil adjustment is about half/half, and the top bolt is just on the thread (ie the shaft of the shocks are just above the top of the bolt.

Would having the wheels in the air for an extended time do this? Because thats the only thing I can think of really.

petern Enthusiast

petern

Posted
Posted (edited)

i think you just answered your own question in that last sentence......

having the the wheels in the air for an extended period would put pressure on the shocks - weight of the wheels and brakes.

I know when I disconnect the shocks on the rear on my 1600, i can push down on the back and bounces a fair bit.

I would say shocks are stuffed!

Edited by petern
nisskid Grand Master

nisskid

Posted
Posted

wheels in the air shouldnt bust ur shocks, as they are still in the static position, but will put a bit of pressure on the travel stops if it is infact the shocks which are suspending the wheel, often its the arms/rods or half shaft suspending the wheels up, and the shocks arent.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • -Jimmy-
      R32 gtst speedo out by 10kph

      By -Jimmy- · Posted

      Interesting, I haven't read about the issue with oil getting into the speedo in the cluster before. I'll have to take more notice with mine. The speedo on my R32's when I've run factory diff and tyre size have never been accurate as far as I can remember. The non Type-M GTS-t did come with 15" 5 stud wheels and smaller brakes, but that's less than 5% of them.
    • -Jimmy-
      My R32 Money Pit & The Headaches That Come With It

      By -Jimmy- · Posted

      Good to hear the condenser you picked up off my brother worked all good. Do you think there could be an issue with your AC compressor itself or the clutch on it then? I don't know a lot about them so I can't really help but keen to hear what it ends up being. Keep the build thread going man, it's nice to look back on over time.
    • Lithium
      Shoota's R33 GT-R RB30/26

      By Lithium · Posted

      This is a story of my life things, I learned eventually (thanks to someone calling me out) that my enthusiasm for discussing and sharing ideas that it came across as arrogance and I'm like... WTF?!    One thing I'm pretty sure I justifiably pride myself on is knowing that everyone will have things they can teach you, and you're always going to find out that something you think you know turns out wrong - you just don't know what it is until you get there.   Just the bursting enthusiasm that comes with ADHD when you hit something that gives you dopamine dumps can come across like you think everyone else is wrong or don't matter. But yeah, I'm a software engineer by trade and also do tuning in weekends and 100% have long had a reputation for  quickly making connections when resolving problems or forming solutions that I've sometimes had to take people form a long walk from start to end to explain how I ended up where I did when it's seemed "too simple" when I've stated my initial case, and had the "WTF" type reaction when they've realised how much was actually considered haha.   My reward is that I get all the curly problems thrown at me.
    • MBS206
      Shoota's R33 GT-R RB30/26

      By MBS206 · Posted

      Wives never seem to find things funny. Especially when they're trying to sleep, and you've found the new funniest thing ever. I've never seen someone be able to get try and be cranky with me, while they're holding back fits of laughter... 😛   Also, I tell mine it's payback anyway. She has BiPolar. So the household can get quite emotionally wild at times 😛
    • Butters
      WA PITS: Am I screwed?

      By Butters · Posted

      I'm not up to date on the latest, but for basic modifications like pod filter, lower springs etc you can get a modification permit at the time of inspection.  For more serious modifications you will need engineering.  Intercoolers used to fall into the mod permit rule but its been a long while since i looked it up.   Either way you will be able to get it registered, just a case of $300 vs $3k . 
×
×
  • Create New...