Back End Light? Options

[o0black0o]

Wondering If it just me or not. Anyway, Lets say have to stop really quick and turn at the same time. I think my back jumps up in the air then falls back down, at least it feels like it? I got my spare back there so...

[GT4WRC]

Which comic book did you get all that info from?

It's all down to weight transfer. This is why the rear end of a car can get 'light' and unstable, especially when braking really hard. Brake bias puts most of the braking force to the front where most of the work is done. But front and rear braking happens at the same time. The front does not start braking first followed by the rear
You will always get weight transfer when braking - it's a simple rule of physics. The degree to which it happens is dependent on speed. This is why rear engined cars can easily 'swap ends' when braking heavily as most of the weight is at the rear. Brake bias is also set up so that most of the braking can be at the rear where the weight is.
Other factors need rto be taken into account - especially the road surface. If the surface is uneven when braking hard, it can easily unsettle the rear end of the car even more, causing it to lift up more than it usually would.
Answer is twofold. Get your suspension sorted (shocks AND bushes) and don't drive like a tw@t where you get intoi a situation on a public road where you're likely to get the rear end light.

Gary

[Kwanza26]

Which comic book did you get all that info from? 

It's all down to weight transfer. This is why the rear end of a car can get 'light' and unstable, especially when braking really hard. Brake bias puts most of the braking force to the front where most of the work is done. But front and rear braking happens at the same time. The front does not start braking first followed by the rear 
You will always get weight transfer when braking - it's a simple rule of physics. The degree to which it happens is dependent on speed. This is why rear engined cars can easily 'swap ends' when braking heavily as most of the weight is at the rear. Brake bias is also set up so that most of the braking can be at the rear where the weight is.
Other factors need rto be taken into account - especially the road surface. If the surface is uneven when braking hard, it can easily unsettle the rear end of the car even more, causing it to lift up more than it usually would.
Answer is twofold. Get your suspension sorted (shocks AND bushes) and don't drive like a tw@t where you get intoi a situation on a public road where you're likely to get the rear end light. 

Gary
[right][snapback]335699[/snapback][/right]

Don't even think I'm, some sort of Initial D fan boy.

So what exactly did I say that was "wrong"? Heh... FWD cars don't get "light" in the rear under any circumstances beyond what I describe (if they did so often... why do they understeer so much huh?)... and it's EXACTLY as you say... unless it's under heavy weight shift (in this case... only during very hard braking)... and if that's happening in a FWD car... you're simply going too fast. You're saying exactly what I'm saying... except I'm thinking about this from a practical standpoint... assuming people are driving on normal roads. Also... what I describe about braking is correct. The front do approximately 80% of the braking, and the front WILL start locking before the rear... and all things considered, the rear applies very little pressure anyway. Now think about it... if the front is doing 80% of the braking, the rears do 20%... the front will be able to lock up before the rear at a given speed. This has NOTHING to do with when the brakes start applying... but only the end result. Yes... the front and rear do start applying at the same time... but because the fronts can do more than 3 times the work of the rears... the fronts can technically lock up sooner... think about it before you try to act "smart". This is done for a reason... and even in Rear/Mid engine cars... the front brakes will be stronger. You're silly to think the rears will brake stronger on a rear/mid engine car. The rears may brake harder in a rear/mid engine car than a FF car or FR car... but it still doesn't mean the rears brake harder than the fronts. That's just dangerous... If rears were to brake harder than fronts, plus that heavy rear (MR or RR)... the car will simply be unpredicatably unstable during hard braking (think pulling e-brake).

*shakes head*... you tend to jump to conclusions before understanding a post. Last time around... it was about a brake rotor dust/stone covers... which you adamently said it was a "stone" guard... NOT a dust cover. Turns out... Toyota calls em dust covers also... Kinda lame to try to pick apart someone's post by saying the exact same thing... no?