Lowering the mach's nose.

[Mach1Run]

A while back I was considering lowering my car with either the eibach sports or HR super sports. Then I got to thinking about my what I really wanted out of the car as a whole and how I do not want to do any mods more than once if I can help it. Ultimately I think I will wind up going longtubes and procharged and forging the motor. What I want out of a drop is to bring the nose down a bit but still be high enough to get over speedbumps, and a spring that will help get the weight on the back wheels when I nail it. I want to feel it sit down and dig in not slid to the side. I dont really feel the weight go to the back on the stock springs. Now i have been doing some reading and I am thinking maybe going with the FRP C springs. Should leave the rear at the same height and bring the nose down 3/4 of an inch I think. Don't want to cut my stockers in case i decide I dont wanna go back for some reason. After I pick the springs then I'll worry about complementary shocks, arms, etc.

Heres the page I was using to compare rates and drop.

Coil Spring Tech

Am I thinking along the right line here?

 

[Thundermouse]

Some of your suspension goals that you described cannot be achieved with just a new set of springs. That being said, with the Ford C springs, you can expect the rear to drop as well as the front (although the front will drop more).

Also, with all the aftermarket springs that you list you will end up with a higher rear spring rate, thus reducing weight transfer in a launch.

 

[Mach1Run]

Then maybe I misunderstand how they work. The springs are just step one to getting there. I thought a higher rate in the front would help pick the weight off the front during launches and a lower or progressive rate in the back would make it easier to push the tail down at launch. I was thinking about just swapping the fronts out first an trying that for a while before swapping the rears in.

 

[Thundermouse]

Springs are sold in matched pairs because changing only one end of the car will affect the front to rear handling balance in several different ways. Now it's not the end of the world to only swap out the front springs to a higher rate, but in most cases the small straight line traction gain is not worth the tradeoff of hurting other ride balance charateristics.

If your long term goal for this car is to be a high powered drag racer that can actually make use of the power that it makes, you really should consider the rest of your suspension as you are picking out springs. Doing so will help you keep from having to change things more than once. For example - Are you ever going to move to a torque arm - you will need a relatively higher rear spring rate if you do. Also plan on matching your shocks and struts with your springs.

The point is that there are tons of options, and each choice affects other things you may want to do later. Plan out everything you want to do now, or else just be prepared to have to go back and change things.