Vee_Que Think weight transfer. When you accelerate, the weight moves backwards. The stiff springs instead of allowing that are pushing back. It's why so many people with coilovers who say how it handles flat, have a crap handling car on a rough road as it just pushes it left and right, or they will deny it or not go on windy roads after they scare themselves on a windy rougher road and almost go off the cliff going a few kms over the limit. All became they think no body roll is the way to have a car. Drag cars care for weight transfer, softer springs in the rear, even stock sports ones, allow the load to transfer and then take off with all the weight you can get on the rear allowing maximum traction. Instead of it hopping and jumping all over the place.
carnut1100 My GT has stiff cut springs when I got it. Swapping to DVS Kings gave me15kmh in the same corners because it now had real grip...
volvodriverman blondejay;108665 wroteWhat were the stiff cut coils? They were just stock 79 gt springs with a couple of coils off, I know, I did it!
carnut1100 The amount of chop made them quite stiff...was around 75mm lower than stock IIRC. cornered very flat on smooth roads but got quite unhappy on bumpy corners. DVS Kings rode softer and corners better on country roads.
deleted_user_160 I think that may be th is grey area I was talking about earlier. Leverage ratio of the trailing arms over the coil and damper is increased. It's also one of the other things I've brought up. Lowering your car can increase this. Even I've toyed with the idea of lowering my trailing arm pivots to avoid this issue in the future.
GingerNinja Both my 245s seem to do it and I think there are DVS Kings under the turbo one. It's pretty soft and comfy but it has average tyres and tends to blaze them in the wet before the axle hop really gets going. The wagon with 250lb springs also has wider and better tyres so the hop is much more noticeable. There are a lot of steep hills around here that get slippery in the wet. It usually happens on a low speed, first gear take off.