djharmonix

Hey guys,
I recently bought a set of OHLINS shocks, they are made for 996 C2 and fit my car but came without the springs.

I use my car as a daily driver but also track the car at rennsport regional events in Mont Tremblant every month and sometimes St-Eustache lapping as well.

So i am looking to find a balance for this hybrid use and know nothing about spring rate and such suspension specifications...

From what I read, I need 8'' & 12'', 2.250'', still debating on getting helper spring or not.

If anybody can give me a little help it would be appreciated!

Thanks!!

The DareDevil

Can't help with the spring rates, but the Ohlins will transform your car (especially if you're coming from a stock setup).

djharmonix

Yes!! Or so I was told!

Along with all the suspension linkage that I need (and cost more than the shocks!) hahaha

The DareDevil

I upgraded my suspension incrementally. Apart from it being easier on the wallet, it was nice to feel how much each individual component contributed to the improved handling of my car.

alpine003

I would hit up the GT3 and Cup Car forums to get some kind of baseline, not to mention maybe getting a deal on second hand springs those guys no longer need. I know the guys with the expensive setups like triple adjustable Motons and such tend to never be satisfied and always upgrading their springs.

As for Mont Tremblant, I would just be cautious and make sure you're not over-sprung on that track as I know it has a couple bumps that have been known to upset a lot of cars mid-corner that are stiffly sprung.

~550F and ~700R seems to be a good street/track combo.

If more serious and doing quite a few track events then 700/900.

Most hardcore will be closer to 800/1000.

This is just a general reference from recent trends.

djharmonix

Thanks for your input ^^

Since I am driving the car almost everyday on our DISASTROUS roads, I don't think i can go very stiff unfortunately... So the cup setup will definitely be too much for my use. 550F is what I read and the rear varies 700-850.. Hmm

Yes that is a good point, although some parts are necessary for the install, like top plates/camber plates and drop links that didnt come with my shocks.

jj1

What type and size of tires are you using?

The DareDevil

In contrast, stock 996 GT3 spring rates are 228 lb/in (40N/mm) front, 543 lb/in (95N/mm) rear (which I find brutal in and around Montreal).

djharmonix

Right now I have Conti extreme contact DW. About 2-3 events left in them.

Will use PSS after this set is done.

295/18 rear and 235F

m3driver

Contact ohlins, tell them what you have, what you want and they will tell you which spring rate to use. I ran ohlins extensively on my road race bikes and the were always a help

djharmonix

That is a good idea! I will write them and see what they say!

captain pabst

996.1 spec stock springs are 600 rear 300 front.

vandersmith

This is what I was able to find for C4S/TT. Should be somewhat relevant for C2/C4 applications:




Spring Rates for all C4S/TT Options