2015 BRZ Shakes during burnouts??

[SamtheKorean]

Hey guys, I find this forum very helpful with car maintenances, interior, and etc and rn im having some issues with my right rear suspension/ differential?
I own 2015 brz with rays gramlights, lowered spring with hankook ventus v12 evo 2 (265) and during trial of burnout wet/dry surface as soon as wheels start to turn, right rear wheel starts to skip/ vibrate up and down. does anyone know solutions to this problems? im hoping to get new coilovers so i dont have to rely on lowered springs. Also if you have any recommendations for good coilovers and suspension mods help yo brother out with good infos

[RJasonKlein]

Read this thread and come back to us with questions:

https://www.ft86club.com/forums/showthread.php?t=29020

Why do you want to do burnouts in your car in the first place?

[Subsonic]

My 2015 does it too, with factory suspension etc. In the old days we used to refer to it as axle tramp and it only happens at low road speeds when spinning the rear tyres. I get no such effect if drifting, ie. there is a sideways component to the slide, it just spins and slides. If I'm going fast enough, and can spin the tyres on say a wet greasy road in third there is no shake either.

[Ultramaroon]

Originally Posted by RJasonKlein

Why do you want to do burnouts in your car in the first place?

Because it's fun.

[churchx]

There are lot of compliant bushings for these cars in transmission & suspension for comfort and to reduce NVH. Some of technical design decisions are for safety. They all add up that when your wheels are spinning in burnouts, that several components rattle/shake up a lot.
You can change that, eg. install less compliant aftermarket mounts/bushings, eg. rear subframe, diff, gearbox bushing & mount, engine mounts, but not without increased NVH during DD. Some shaking may be attributed also to two piece drive shaft, which is designed this way to fold in case of frontal accidents, to allow engine move down instead up straight, possibly injuring legs and shaft breaking off and piercing cabin or digging into ground and breaking something else in unexpected fashion. Everything is compromise, so not sure if not that frequent use type warrants compromising other areas.

[humfrz]

Originally Posted by Ultramaroon

Because it's fun.

you're advocating bad habits to the young-ens, old man.


humfrz

[humfrz]

Originally Posted by SamtheKorean

Hey guys, I find this forum very helpful with car maintenances, interior, and etc and rn im having some issues with my right rear suspension/ differential?
I own 2015 brz with rays gramlights, lowered spring with hankook ventus v12 evo 2 (265) and during trial of burnout wet/dry surface as soon as wheels start to turn, right rear wheel starts to skip/ vibrate up and down. does anyone know solutions to this problems? im hoping to get new coilovers so i dont have to rely on lowered springs. Also if you have any recommendations for good coilovers and suspension mods help yo brother out with good infos

Hi ya, SamtheKorean, welcome to our gang -

First off, doing "burnouts" in this car isn't doing it any favors, it's hard on the whole driveline and suspension.

Second off, it doesn't have enough power to impress anyone with a chirp and a puff of smoke.

Third off, you bought the wrong car to do burnouts.


OK, it's old grandpa's med time -

[Somerandom18]

Get poly or solid bushings for rear subframe and diff mounts. This helped a lot for me. Now only the transmission is shaking like mad instead of the entire car.

Sent from my Pixel 2 XL using Tapatalk

[Summerwolf]

All the people saying not to do burnouts, or you bought the wrong car.... stfu. It's a rwd sports car.

My guess is you're not using enough initial rpm to get it going or your tires are too sticky without enough power. A 265 is a decent sized tire for sure. You're getting what's commonly known as "wheel hop."

Obviously changing bushings will help driveline vibrations, but my guess is not enough power for the tires / road surface.

If you continue to have issues only on one side you can try a different half shaft (available in the aftermarket) on that side.

Although that is a last ditch effort imo several manufacturers actually build different weights / diameters into their axle shafts to combat this very thing.

[bcj]

[ame]https://www.youtube.com/watch?v=7f526kO7IMw[/ame]

[TommyW]

Originally Posted by SamtheKorean

im having some issues with my right rear suspension/ differential?
and during trial of burnout wet/dry surface as soon as wheels start to turn, right rear wheel starts to skip/ vibrate up and down. does anyone know solutions to this problems?

Yes stop doing burnouts. I pity the person that buys cars from these guys. The abuse I read about on this forum is frightening.

[Summerwolf]

Originally Posted by TommyW

Yes stop doing burnouts. I pity the person that buys cars from these guys. The abuse I read about on this forum is frightening.

Isn't your avatar a picture of your car at a track????


These things are toys. Enthusiasts will use them enthusiastically.

[wparsons]

Originally Posted by Summerwolf

Isn't your avatar a picture of your car at a track????


These things are toys. Enthusiasts will use them enthusiastically.

Burnouts and drifting are significantly harder on a car than a track day...

[Summerwolf]

Originally Posted by wparsons

Burnouts and drifting are significantly harder on a car than a track day...

I feel like they're all using the car in a way that it was intended...... track days can be considered abuse by many anyways.

What's worse? A 30 second burnout or multiple track laps at 8/10's? Lots of factors at play.... everyone is going to enjoy the car how they want to.