Civic EG

ok ok i got a topic in suspension but no one looks in there!!! And i need to order these tonight! my car is bottoming out and putting gouges in my brand new tires! ok guys is a spring rate of 450 in front and 250 in rear decent for a DD/ weekend track car??? please help me i need to order these tonight?

This is from a different forum, credits go to Vankuen from www.evolutionm.net

I was looking through the spring rate chart for various vendors, and thought this might be useful.

1lb = 0.45359237kg
1in = 25.4mm

.45359237 / 25.4 = .017857967322834645669291338582677

So now we know that 1lb/in = .017857967322834645669291338582677.

So if we want a spring that's roughly 560lbs; we'd multiply both sides by 560, and come up with roughly a 10k spring rate. Alternatively if you already know the kg/mm rate and want to find out what the lbs/in is, just divide the spring rate by that reaaally long factoral above (the .0178...).

But just in case you all didn't want to go through all that, here's a chart:

kg/mm to lbs/in
-----------------------------
16 = 896
15 = 840
14 = 784
13 = 728
12 = 672
11 = 616
10 = 560
9.0 = 504
8.5 = 476
8.0 = 448
7.5 = 420
7.0 = 392
6.5 = 364
6.0 = 336
5.5 = 308
5.0 = 280
4.5 = 252
4.0 = 224
3.0 = 168
2.0 = 112

The spring rates you mentioned seems perfect for a DD, but a little too soft for track, just my opinion, 100 pounds is a big difference. I Auto-X and have 10k 5k rates.[/b]

I would go closer to 350 in the rear, this would give you an 8k/6k set up, better question is what is on your car now and what kind of shocks.

If the shocks are shot then that could be the cause of it bottoming out.

I have 10k/8k on mine I don't drive mine on the street its harsh The rear is what determines whether you can drive it daily or not less in the rear rides more comfortable.


And JohnRM great post seen this before should be added to a sticky.

Well the previous owner told me it was skunk 2 and after taking is lowsy "paint" job off em they are kyb gr-2 struts (fully blown) and 3" drop springs from ebay....I know this is the problem of my horrible ride and current situation but I bought kyb agx adjustables and wanna know a good spring for em....and what I wanna do I don't need conversions just opinions ya know there is already a conversion sticky in the suspension forum....I don't want a slammed drop due to unpleasant road ways.... just a 1.75" drop would be perfect

Eibach or skunk2 springs will be the best for ride comfort.

which eibach? I found some springs called DNA springs with a rate of 450 in front and 250 rear but on another site they are 280 front and 230 rear or something like that???..... but what bout eibach pro's?

Any Eibach would be better than off brand stuff. Eibach has been making aftermarket suspension stuff for a long time and are known for quality and service. Any kit from them will work just look at how much it will drop your car.

ok so i am going skunk2 now but can you put sleeves on any spring? or do you have to buy a combo set???

Go with the combo from skunk2 if anything don't try to put different springs on other sleeves. and get aftermarket shocks to handle the drop as well so you have the right travel length on the shock.

JohnRM wrote:This is from a different forum, credits go to Vankuen from www.evolutionm.net

I was looking through the spring rate chart for various vendors, and thought this might be useful.

1lb = 0.45359237kg
1in = 25.4mm

.45359237 / 25.4 = .017857967322834645669291338582677

So now we know that 1lb/in = .017857967322834645669291338582677.

So if we want a spring that's roughly 560lbs; we'd multiply both sides by 560, and come up with roughly a 10k spring rate. Alternatively if you already know the kg/mm rate and want to find out what the lbs/in is, just divide the spring rate by that reaaally long factoral above (the .0178...).

But just in case you all didn't want to go through all that, here's a chart:

kg/mm to lbs/in
-----------------------------
16 = 896
15 = 840
14 = 784
13 = 728
12 = 672
11 = 616
10 = 560
9.0 = 504
8.5 = 476
8.0 = 448
7.5 = 420
7.0 = 392
6.5 = 364
6.0 = 336
5.5 = 308
5.0 = 280
4.5 = 252
4.0 = 224
3.0 = 168
2.0 = 112

The spring rates you mentioned seems perfect for a DD, but a little too soft for track, just my opinion, 100 pounds is a big difference. I Auto-X and have 10k 5k rates.[/b]

Awesome!

$153 and some change shipped to my door sound right? lol

For a dedicated track car (94 EX Coupe), I run 700# front and 1000# rear. Way too stiff for street, but just right for the track.

I'm interested to hear more about folks running higher front rates (than rear) - That is opposite of everything I've ever heard for a Civic...

I have 11f and 8r on mine and I love it and I daily my hatch.