I want to lower my car, as most do.. However I do not want to hurt handling. I assume the BBRP springs are constant/linear, and everyone offers progressive springs, which do not have the same track abilities, wondering what everyones take is on this.
Does anyone have the spring rates of the new BBRP for 2013 ?
I'd like to stick to Ford Racing parts but can only find progressive spring rates...

 

Have you thought about the rear 55D springs that lower the rear 1/2 inch and even out the car yet keep the stock rates and handling?

 

I want to lower the front to... its a bit too high

 

you may limit yourself for choices if you are looking to lower the front and rear of the car to probably the suspension kit from Ford Racing -- that is if you are looking to keep all Blue Oval parts on the car. Or else think along the lines of redoing the suspension with BOSS components.

is there a reason you want a fixed rate spring on the car, rather than a progressive?

are you considering a 1" drop or lower? Only reason i ask is that the 55D rear springs drop the rear a little over a 1/2 inch and that settles the car somewhat. if you are looking to lower the front too, are you looking for an additional 1/2 inch or lower?

be mindful that if you do lower the car significantly it will affect how your struts and shocks respond also; as you lower the car the struts and shocks lose travel which quickens the dampening rates.

Suspension components work according to the "domino effect" -- its all in the geometry .. or so to speak

 

Steeda sport springs are pretty popular for an ~1" drop. I do believe they are linear. I've got the 55d springs in my car and am happy.