BD Race Springs - Rear Rate

[PLDRIVE]

Race springs were (2008) around 450 front and 950 rear.

[cbreez]

Originally Posted by PLDRIVE

Race springs were (2008) around 450 front and 950 rear.

That just doesn't sound right for the rear...seems way to stiff for a 2400 lb car...
Why don't you remove them and find a local racer with a spring checker to actually check them? Have you ever really checked your shock travel first...to see what they are doing?

[pjmoore2003]

I have the race springs, car corners flat and rides nice over bumps... But my seats are much more padded

[PLDRIVE]

I had the springs tested . The rear springs were way toooooooooo stiff for my liking. I would not recommend them if they are still 950.

FYI Coilovers are roughly 60 to 65 % of an e36 rear spring rate ( u may have already known this.)

I run MCS double adjustable coilovers (Moton) on all corners.

[wrogers55]

Do a search here under "Spring Help" in 2009. I was the original poster. Tony Martin replied as well as some other good info.

I have chassis 318 on 315/17 Nitto NT01s which grip enough to break things if you are not a bit careful, and I run it really, really low. To keep it off the ground, I run the race springs on the rear and standard BDR springs on the front. Probably not your perfect track setup, but works on street extremely well. The soft front compared to the rear really turns in well, but you will need some good experience to get comfortable and stay out of trouble with that kind of setup. It's a rough ride on an empty tank and driver only. Fill up the tank and put a passenger in it and you would love it.

Biggest benefit is no bottoming on the street, loaded, even with a super low ride height.

Good luck.

[Kobura]

I "measured" my stock spring rates by first jacking up the right front wheel and then the right rear wheel to unload them of the car weight and measuring the drops in the height of the fender lips when the car was lowered. The front dropped 2-1/2 inches and the rear 2 inches. Assuming that the car weighs 2400 lbs and each corner supports 600 lbs, the spring rates would be 240 lbs/in for the front coils, and 300 lbs/in for the rear springs. The springs are located between the tires and the pivots for the suspension arms, so the actual rates are much higher, maybe up to twice(?). I know, totally ballpark numbers, but at least it gave me something to work from toward softening the ride.

[lovehamr]

I ran the race springs on my last BDR and they handled great on smooth surfaces but it didn't seem like the shocks were up to the task of controlling them. I also don't know of any performance replacement shocks to go with them.
Don't have the race springs on BDR1311.

Because of the shock question I'd really like to see PLDRIVE's setup and cost!

Originally Posted by PLDRIVE

I had the springs tested . The rear springs were way toooooooooo stiff for my liking. I would not recommend them if they are still 950.

FYI Coilovers are roughly 60 to 65 % of an e36 rear spring rate ( u may have already known this.)

I run MCS double adjustable coilovers (Moton) on all corners.

[PLDRIVE]

Lovehamr here u go. As for the cost.

Kevin,,,,,,,,,, i still have the wheels u agreed to buy, but refused to answer the phone or return email. Yes i still remember