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RX8 jumping around

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Old Nov 14, 2008 | 12:15 PM
  #1  
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RX8 jumping around

My lovely rx8 has just been for a 3 year service at mazda, sparks, diff oil, I was very impressed with there level of service and the car feels great. well I thought it did until I went to any empty car park to do some tricks. Basically if I want to spin up the back wheels the whole car jumps around really badly. It had never done this before the service.

Any ideas???
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Old Nov 14, 2008 | 12:32 PM
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When you mean by tricks. do you mean like making your car do a 360 flip to k grind. and also when you mean by jump. like as in a ollie?


btw never heard of these type of issues. but hopefully someone will be able to answer your problem.
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Old Nov 14, 2008 | 01:06 PM
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ok. so if i set the revs high, dumped the clutch then the rear wheels dont spin up like they did...smoothly spinning up to cause tyre smoke. I know it sounds strange when your in the car it feel like the car is juming up and down and you have to stop, unlike before when it was smoking up big time.
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Old Nov 14, 2008 | 01:11 PM
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Originally Posted by bomber
ok. so if i set the revs high, dumped the clutch then the rear wheels dont spin up like they did...smoothly spinning up to cause tyre smoke. I know it sounds strange when your in the car it feel like the car is juming up and down and you have to stop, unlike before when it was smoking up big time.
turn off traction control
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Old Nov 14, 2008 | 01:15 PM
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haha. sorry i hadn't made it clear that i have turned everything off, as always!!
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Old Nov 14, 2008 | 01:28 PM
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Have a fat kid sit in your trunk.
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Old Nov 14, 2008 | 01:47 PM
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unfortunately we dont encourage child obesity where i live. I would like some good feed back on the problem i have
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Old Nov 14, 2008 | 01:56 PM
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Sell your car, get a new one.
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Old Nov 14, 2008 | 01:58 PM
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What else changed? Temps, tires, any suspension bits? Sounds like wheel hop is what your describing. Check in the rear under your car. See if the endlinks are connected and not broken. Aside from that I am not sure off the top of my noggin.
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Old Nov 14, 2008 | 02:03 PM
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Okay, time to get serious about playing...

You said you turned off traction control (full hold down button for 8 secs until you see 2 lights up on your dash) - at this point you can turn on DSC only after stopping and restarting the car.

The jumping around you are getting is actually called tire hop, and yes it is horrible in our cars, especially when our tires are cold and when you have things going on at low revs.

By parking lot tricks I usually mean donuts and powerslides.

When doing a donut, you have to dump the clutch at a high rpm to get the wheels to move beyond hopping to actually sliding. While performing the donut you also need to be reving high.

On a wet surface popping your clutch at 4000rpm is usually enough to get you through the hops. On a dry surface I dump at 6000 to get things going. While I'm spinning around I'm in between 4000rpm to 9000rpm and always in first gear.

The key to getting past the wheel hop is to keep the car well up in it's power band. Because we lack torque, it's the only way to do things. Rolling burnouts are really hard to do for this reason, but can be done with sensitive left foot braking and a heavy right foot.

No matter what I do I always get a bit of hopping at the beginning..

* sorry just reread the first post, I think I'm off the mark here...
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Old Nov 14, 2008 | 02:09 PM
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search for the term wheel hop.

beers
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Old Nov 14, 2008 | 02:13 PM
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You have a case of wheel hop, put a bunch of JL **** in your trunk like I did and itll go away.
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Old Nov 14, 2008 | 03:18 PM
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Originally Posted by bose
What else changed? Temps, tires, any suspension bits? Sounds like wheel hop is what your describing. Check in the rear under your car. See if the endlinks are connected and not broken. Aside from that I am not sure off the top of my noggin.
temp has changed got real cold roound here just lately. bought the car in the summer.
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Old Nov 14, 2008 | 03:22 PM
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Originally Posted by 416to212
Okay, time to get serious about playing...

You said you turned off traction control (full hold down button for 8 secs until you see 2 lights up on your dash) - at this point you can turn on DSC only after stopping and restarting the car.

The jumping around you are getting is actually called tire hop, and yes it is horrible in our cars, especially when our tires are cold and when you have things going on at low revs.

By parking lot tricks I usually mean donuts and powerslides.

When doing a donut, you have to dump the clutch at a high rpm to get the wheels to move beyond hopping to actually sliding. While performing the donut you also need to be reving high.

On a wet surface popping your clutch at 4000rpm is usually enough to get you through the hops. On a dry surface I dump at 6000 to get things going. While I'm spinning around I'm in between 4000rpm to 9000rpm and always in first gear.

The key to getting past the wheel hop is to keep the car well up in it's power band. Because we lack torque, it's the only way to do things. Rolling burnouts are really hard to do for this reason, but can be done with sensitive left foot braking and a heavy right foot.

No matter what I do I always get a bit of hopping at the beginning..

* sorry just reread the first post, I think I'm off the mark here...
yes i mean some donuts and drifting. Ok, some more power then? get pass the wheel hop. when you get to the hop you just feel like stopping!!
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Old Nov 14, 2008 | 03:24 PM
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Originally Posted by bomber
yes i mean some donuts and drifting. Ok, some more power then? get pass the wheel hop. when you get to the hop you just feel like stopping!!
Feather the clutch out at 5-6K instead of dumping the clutch.
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Old Nov 14, 2008 | 03:25 PM
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Your tires are cold = less grippy? By fat kid, I meant some weight. Wheel hop is very, very common with this car.
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Old Nov 14, 2008 | 03:39 PM
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Originally Posted by j8635621
Your tires are cold = less grippy? By fat kid, I meant some weight. Wheel hop is very, very common with this car.
maybe a bag of sand would help?
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Old Nov 14, 2008 | 03:41 PM
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Originally Posted by Renesis07
Feather the clutch out at 5-6K instead of dumping the clutch.
ok will try
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Old Nov 14, 2008 | 03:42 PM
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I just wouldnt try doing donuts in your car.
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Old Nov 14, 2008 | 03:55 PM
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Thanks for everybodys input. I will do some testing next week when i finish work.
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Old Nov 14, 2008 | 04:49 PM
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Originally Posted by quazmosis
I just wouldnt try doing donuts in your car.
My particular car, our the rx8 in general? Why?
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Old Nov 17, 2008 | 03:41 PM
  #22  
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I just don't see the point. Nothing against you personally or anyone.
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Old Nov 17, 2008 | 04:05 PM
  #23  
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I believe he is looking to bring it back to the dealer as soon as possible to complain about a broken diff...
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