2013 Boss 302S Spring Rates

[DocB]

Maybe someone knows, and I hope this is the right place to ask:

What are the spring rates on the 2013 Boss 302S coil-overs?

TIA.

 

[nycarpenter]

spring rates - The Mustang Source - Ford Mustang Forums

 

[AZBOSS]

spring rates - The Mustang Source - Ford Mustang Forums

He's asking about the 302S, it's not listed there.

The FR500S was rumored to be 500F/300R, I've heard further rumors that the 302S rates are 550/350, but I, like the TS, would like someone to just tell me what the facts are!

 

[nycarpenter]

He's asking about the 302S, it's not listed there.

The FR500S was rumored to be 500F/300R, I've heard further rumors that the 302S rates are 550/350, but I, like the TS, would like someone to just tell me what the facts are!

I missed the S. Sorry OP

 

[DocB]

I can attest to that the FR500S rates are in fact 500/300.

Was hoping that someone know in fact what the new spring rates are.

If they are 550/350 then that is not really a big bump, and seems a little soft for the fronts.

 

[TimB]

The rates are 600 front, 350 rear

Tim

 

[DocB]

Tim, thanks. That sounds a little more along the lines my calculations come up with.
What do you think of that spring rate?
Do you think it is appropriate for this car for hard track use? More?
Have you driven on these springs?

 

[TimB]

Yes , have done 6 races on my 2012 S and some test days. Removed the rear bar and upped the rear rate to 400 , also running the Cortex watts link

 

[86Fbody]

A little different than the original question, however, where are the spring rates for FRPP springs found? I have been able to find the stock spring rates but not the P or K or Boss specific springs they just came out with.

 

[DocB]

Tim,

How did you like the rear with/without bar and 400?

And, how about 625 or 650 in the front?

 

[TimB]

I really like the no bar , 400 lbs spring setup , car gets the power down better and is easier to slide on exit , less nervous. I think 650 front springs are worth trying out as the car is not that stiff with 600's and the turn in is really good .

 

[isrboss]

Tim when running without the rear bar and 400lbs/in springs, what front bar are you running, and what do you estimate the bar lbs/in to be?

 

[DocB]

Tim,

Do you have the Sachs or the Dynamics?

 

[TimB]

Tim,

Do you have the Sachs or the Dynamics?

Dynamics

 

[DocB]

Thanks, Tim. You have been a big help.
I am in the process of tweeking my suspension and if you wish, I will let you know how it works out.
This is on a 500S.
You have me on the straightaways, so I'm going to have to pass you in the corners if we are going to cross the finish line side-by-side.