I have had a total misunderstanding of what I want my drag suspention setup Rate to be. From my understanding I want a stiff rear and Soft front.

Now, This probably doesn't apply, but, Im trying to figure out if the Spring rates I got was good for what I want to do.

I bought some Ground control (eibach) coilovers.

Im not sure how to tell the rates, but I was told they were 350 Rear 250 front

If anyone knows Ground control please feel free to help me find out what the actuall rates I have recived:

FRONT:
151502 GC150.64.52
Rear: 162868 GC180.64.35

 

If im doing the math right it looks like you have ~300/200 rates... your springs are labeled free length.diameter.rate in mm, mm and n/mm. to get a lb/in rate you would divide the last number by .175

like you said, most fwd drag setups tend to run really stiff rear spring, the omni drag coilovers for example are in the order of 1000lb/in

your springs right now look to be a comfy street ride but probably not particularly capable on a dragstrip

 

Well, that sucks. I was told they were rates for drag setup. I got screwed.

 

See, Im going TOTAL drag set up suspention. My car is making 352WHP right now, with some minor fuel issues so ill be doing close to 400 WHP very soon. Ill be running 23PSI and this is not a daily driver. So if you were looking for the right spring rates what would you buy???

 

Probably 300-400 for the front, and 800+ for the rear.

You'll need some STRONG shocks to handle the rear, though. Off-the-shelf Koni Sport shocks aren't good up past about 500-550 lb/in springs.