NJ-GT

Get the shortest Swift (6") and add a 6" zero rate Hyperco Tender with Genesis Isolators.

That's the setup I'm running in the Fiat. I went from stock shocks, to stiffer springs on stock shocks, even stiffer springs with Moton 3-way, th some other springs with Moton, tested F430 Challenge srping/shocks, and ultimately went back to stock shocks on springs that are 300% stiffer than stock (rear Fiat springs at 1800#). From all the tested setups the one now is the nicest one (and cheap), works on streets, autoX, Sebring and the glass smooth tracks.

My current setup is lighter than the stock Titanium springs. Less unsprung weight.

Here are the parts you need:
http://store01.prostores.com/servlet...Detail?no=3277

http://store01.prostores.com/servlet...Detail?no=3270

Use 60mm ID, but if they are not made, you can use 2.5" instead with your stock struts and 60 ID main springs.

I use Swift springs as well, they are lighter and more consistent across the compression range. Really good stuff (and cheap)

drabe

Would the front spring for the GT2RS work?

Mvez

Porterfield keeps Swift springs in-stock. I already bought mine. Thought about the shorter spring stack, but I'll do that once I'm ready to tinker with the rear springs as well. Need to have a custom rear spring hat made for 60mm or 2.25 ID.

After a stiffer front spring upgrade, I'm questioning the need for a bigger front bar (you only need so much adjustability). Drop links and a bigger rear sway bar are what the car really needs.

Larry Cable

what do you think about the tarret monoball "ends" as an alternative to the RSS control arms, so you get to keep the Porsche arm just replacing the bolted end with the monoball?

http://www.tarett.com/items/996-997-...996-detail.htm

and ...

http://www.tarett.com/items/996-997-...a01-detail.htm

Larry Cable

interesting article in this months "Total 911" about the 9ff G-Track 480; they retained the PASM dampers and added custom H&R springs rated (f) 60kg and (r) 120kg with helpers ...

997gt3north

If this 60kg is = 6.0kgf/ mm = 60 N/mm,

Then,
60kg = 336#
120kg = 672#

Somewhat interesting, the B16 Damptronic I believe uses a very similar front #, and then 3.8 RS uses 115N/mm or just less than 650#s.

As a comparison, the KW clubsport suspension
Was - 350/950
Is now - 400/1000

I find it interesting that the German guys seem to consistently run softer front and more rear thus larger spread than the standard American Moton Specs is 500/700, 600/800, 700/900, etc.

AudiOn19s

I'm with you on this one. I had H&R RSS Clubsport coilovers on my old C2 and the published spring rates were 450/900. That car drove pretty nicely but I was suprised with how much rear bar (GT3 bars) I had to use in the car to get it to turn like I wanted.

My current GT3 has JRZ Triples on it with measly 600/750 springs, is probably 100lbs heavier than my old C2 and still drives better.

To this day I still try to understand why some use a huge split and others don't.

There are a few tuners out there running the same spring rate front and rear as well and they swear by it.

That Guy

... and don't look back. Nothing else quite like 'em, and the GT cars have the chassis rigidity to fully communicate every adjustment.

Turn-key kits are available for 997 GT3 applications, two-way adjustable (low speed comp & reb), upgradable to three-, four-, or five-way if you feel the need to really get in over your head (or run data acquisition)!

You lose the PASM but the TTX damper w/ inline reservoir allows easy access to adjuster *****, so reaching behind the wheels to switch between street and track settings is simple.

Pricing should be comparable w/ Moton, perhaps a bit more than a Damptronic kit. Worth looking into for those so inclined, IMO.

911SLOW

To confuse you even more, note that the same German tuner that promotes the wide gap in rates between F / R for the street cars, setups the cup cars (for the same track) with almost equal F and R springs, which matches what the factory does to begin with.

https://rennlist.com/forums/porsche-...re-set-up.html

Larry Cable

I believe that the damptronic is an "upgrade" for a 7.1 but I wonder if it so for a 7.2 ...

do "we" know what the Damptronic (what a name - where was marketing) spring rates (and matching valving) are?

Terry L

Yes - around 350/650.

Larry Cable

sorry ... I wasnt paying enough attention to the thread... I should have seen that in earlier post!

damptronic then might be a reasonable compromise for those of us that dont want to abandon PASM ...

mdrums

I'm looking also to see what others think. I have been told this is a great little upgrade and really helps with turn in.

Larry Cable

maya be cheaper/simpler than exchanging the entire control arm ala the RSS solution...

obsessedone

Terry, pleased to still be considered a friend. Look forward to dualing with you at the Glen the next few days. I cheated and went up to the Glen Monday and Tuesday open track with Kojote to practice. Great event, I ran six 45 minute sessions per day, killed some tires and wore myself out.