The spring reads GC180.64.44. I assume this is a 180lb spring?

 

As far as I know that is correct.

 

no, its a number identifying the car the springs were made for, NOT the actual spring rates. call gc for the spring rates, usually if you ask them right they will tell you.

 

The GC180.64.44 is 180mm long, 64mm inside diameter, and 44 Newton-meter spring rate (about 250 lbs).

 

are you sure about that conversion? can you provide your conversion formula.

 

Eibach makes it so simple, why would ground control make it more complicated?

 

I agre...that is pretty idiotic!

 

are those legal for scca solo 1 street prepared class?

 

Yes. Your shocks/springs are free, provided the mount to the original mounting points (i.e. You cant change geometry)

 

those numbers identify the GC kit
if you order ERS springs they have the correct format

 

my gc's have the rate printed on the spring. guess urs don't

 

I'm sure about the length/height/rate part. I'm also sure that they are 44 N-m, but I'm not sure about the conversion off-hand. I took it from a site that listed the conversion factor as 5.7. I didn't double check to see if their conversion factor was correct


[Modified by travis, 6:29 PM 1/17/2003]

 

Well, that makes me feel a bit better, I ordered the Integra Ground Control kit for my 92 Civic w/ ITR shocks and always wondered why they had sent me some not-so-stiff springs. I'll have to grab the number off the fronts tomorrow and give Ground Control a call, I suppose. Or, does anyone know the rates GC sends out w/ their Integra kits?

FWIW, I plan on autocrossing this year and was going to step the rates up a bit (around 375 or so is the most ITR shocks can run, I've been told) and run the GC upper mounts for increased travel until the ITR shocks start to die, then get some Konis and stiffer springs.

 

I believe those are Newtons/mm.

Like some Japanese supension are listed 8k Front and 6k rear. What really means is 8kg/mm and 6kg/mm

if we want to convert that in to pound/in, than some conversion contant is needed .

1 kg=2.2pound
1in.=25.4mm

8kg would then equal
8kg/mm*2.2 pounds=17.6pounds/mm
17.6 pounds/mm*25.4mm=447 pounds/In.

Using the same concept then here are the contanst for newtons
1 Newton= .225 pounds
1in. = 25.4mm

then 44 newtons is equal

44/mm*0.225=9.9 pounds /mm

9.9 pounds/mm* 25.4mm= 251.46 pounds/in.

Or we can just multiply to 5.7 constant for ease of calculation

I think this measurement are pretty common in europe while the USA uses pounds.