Waynetech, those are the Eibach 250 springs?

 

Wanted to see if anyone else had used the IS250 springs (Eibach) on their IS350 recently.

If so, post up some pics!

 

I talked to Eibach today. The rates are progressive and have starting and ending numbers. Here are the rates of the two kits as follows:


Pro Kit IS250 8288.140
Spring rates front 199-to-314 rear 217-to-354
Lowering front 1.4" rear 1.0"

Pro Kit IS350 8287.140
Spring rates front 228-to-314 rear 217-to-354
Lowering front 1.0" rear .8"

~30lbs difference on initial rate. I don't know what difference this will make on the IS350.

 

I wonder if I'd be able to custom order a set from Eibach with the 350's front springs and the 250's rears. then I can have an even drop all around lol

 

The fact of the matter is that the rear springs are the same for both kits. The lower rate and lower drop on the front of the IS250 affects the rear, and makes it 1".

 

I wonder if the the IS250 just gets a lighter rate in the front compared to the IS350 pro kit. Maybe the 250 is just higher from the factory...anyone know?

 

WHY,
1. If you are interested in handling, why would you judge the suspension height by the tyre distance to a fender. If that's all that matters, then fit larger diameter tyres on the back to reduce the fender gap.
2. Going lower than the Eibach's height can make keep wheel alignment difficult and the need for aftermarket suspension components to rectify the problem.
3. Fitting adjustable aftermarket components are a band aid fix, not a solution for over lowering the suspension.
4. Eibach's don't sag.
5. Going lower than the Eibach's height and it starts to bump steer in the rear.
6. The rear sits higher as heavy items in the boot over or behind the rear axle are allowed for, this is not applicable for the front, so it can be lowered more.