SamUK

iTrader: (1)

Hi,

When i put my foot down, why does my car lift up from the front?

I would have thought if its a 4 wheel drive it would'nt do that...

Sam

prana

4wd has nothing to do with front lifting during throttle on, all has to do with weight transfer to the rear causing less compression in the front. Inertia wants to stay where it was.
If you want to prevent this, the silly way would be to increase spring rate in the rear, and increase rebound damping in the front ... that was a joke, but you get the picture. It'd work but you get a very dangerous car then

N1 SPAN

I think the anti lift kit was designed to combat this. Think it's less than £100 too. Check out the scooby shop, sure someone will sell it on there. Think it's by Whiteline.

ScoobySport (SdB)

As said above.. the lifting of the front is purely the laws of physics.

Imagine the car has a level sticking out the top of the roof.. if you push back on it, the car will tip back.. this is exactly what is happening to the centre of gravity when you accelerate.

Don't despare though, this is not necessarily a bad thing. The weight transfer from the front tyres to the rear will happen anyway.. what the pitching of the body means is that the front suspension is pushing the tyres into the ground, so you're still getting grip from the front tyres.

Anti-lift kits definitely have their uses, but from a weight transfer point of view, they CAN (if set-up wrongly) create more power-on understeer due to effectively increasing (momentarily) the weight transfer.

All the best

Simon

DuncanG

The Anti-Lift Kit is a misnomer. It actually removes what there is of the standard Subaru anti-lift geometry. The intention being to keep the front end supple and consistent when powering out of a corner and so increase grip and reduce understeer at the expense of increasing (compared to a standard car) front lift.

You can think of anti-lift geometry as a dynamic change of spring rate, so that when braking and accelerating the front-end spring rate is effectively increased somewhat, so reducing lift on acceleration and dip on braking.

By removing the anti-lift geometry (with the ALK) the effective spring rate stays fixed, is more consistent and somewhat softer under acceleration and braking, giving more grip.

G_Sleigh_STi

Why does a plane take off?

Same principle on a more powerfull scale is it not?

ru'

This is one of the main reasons that front wheel drive is such a dumb idea!!

mark6

true,but its also to do with lack of skill in making a proper car and cost,i suppose it's like making a plane with the engines at the front.

pappasmurf

Mine used to feel it was taking off....until i replaced the standard Sti IV rear spoiler with an Sti V one...never had the problem again.

Trickie

I am having the same problem at the moment

Was just gonna fit a ALK

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