4 Point 0

Congrats. I can hear your smile. I did the TCU tune with Mitch at M-Engineering. Go some nice custom stuff as well. I even had my tuner raise where the valve auto open happens so that I can drive quietly on the street.
To me the car sounds perfect with valves closed, as I am catless now. But when you're under it, its next level. Which is great at the track, but I don't like to be obnoxious on the street. (Well most of the time anyway )

I love watching people learn and go further down the rabbit hole. Some start very small and slow, Then they get a taste and they want more. I love it. There is always something that can be improved to make the experience nicer.
The car can also grow with you, The car makes you better, then you make the car better, then it makes you better. I have always believed a modded car develops personality. I know, it's an illness. I thank god there is no cure,

blackcheetah

Just to remind people who dont have Efuel theres à Nice alternative and it work it's Meth! its cheap ,used when needed and awesome for track use im personaly @29psi all day safely (5sec 100-200)have tested it at 33-34psi but it's pushing it...i wish i had Efuel here i woulded have tested with meth and see how far i could go! For suspension im not a guru but i vote tractive coilovers over the cheaper b16 i think you pay for what you get...

4 Point 0

Agreed. I love that tractive grew with me. I kept getting faster and wanting more. Tractive kept delivering.

You can copy spring rates. That’s one thing, but to have an active suspension with unlimited adjustment designed to work with DSC is mint.

I run Manthey Racing Spec spring rates 120/170 and it is perfectly fine on the street. This is 100% due to the combination of Tractive and DSC.

I have had 110/180 on my M4 on KW-CS and i hated it on the street. It did not pass the wife test.

You can have it all, but you have to pay a little more to achieve it.

Some suspensions are great on the street, and dall over on the track. Some are great on the track, and make your fillings fall out on the street. The combination of Tractive and DSC is great everywhere in every situation.

nilaz

Can you please share with me in PM specific information about tractive suspension?
I am bit confused as I can see a company in Netherlands but not sure if this is the right product as there is no GTS listed in their website.

4 Point 0

If you’re in USA ? Tom from TPC Racing that sells the DSC Sport controllers, also sells Tractive.

TPC Racing

nilaz

I am in Europe. Bought my DCS controller from Tom few years ago but based on current exchange rate between Euro/USD I can purchase suspension only in EU.

4 Point 0

What spring rates are you thinking?

100/150
100/160
120/170 ?



170 MR Spec rear

MR Spec Tractive

nilaz

Either 70/140 or 100/160.
I am more close to 70/140.

Car is 70% road, 30% track.

4 Point 0

May I make a suggestion?

Having had 75/150 which is also 1:2 like your 70/140, don’t do it. Whilst it was very comfy on the street, the front end collapses on the track.

You need more in the front end. 90/140 would serve you way netter at the track, and still be very streetable with tractive and DSC. Or even 80/130.

The front end doesn't really come alive until 100. I ran 100/150 for the longest time because it was just so good everywhere. I only went to 120/170 because i wanted more at the track and i finally trusted tractive and DSC would keep it liveable daily.

Let me know where you settle.

nilaz

Following latest research and available solutions in my area I have below 2 options.
1) KW DDC with 45Nm front 110 Nm rear. Ability to setup axle settings for different profiles and modes from my mobile. A street oriented coilover with KW DNA.

2) KW V4 with 90 Nm front and 190 Nm rear. Adjustable aluminum top mounts which might give some noise in future based on road CONDITIONS. Track oriented coilover with KW and Manthey DNA.

DDC is similar to what I HAVE, more track oriented but not serious upgrade step.
KW V4 is serious upgrade but not sure is the ideal solution for 70% road and 30% track. Based on KW expert it gives so many adjustment settings that can be easily setup for road use.

Installation cost same for both options.
Cancelation kit same for both options.

Still debate which is the most appropriate solution.

thesaintusa

FWIW I absolutely loved my KW V2 on my Subaru STi. Along with swaybars, it was better than OEM ride, and incredibly 'settled'. It managed the small bumps and rises in the road better than my C63 and E63. In many ways I think it handles better than my stock 991.2 GTS which definitely can benefit from more support up front. Would have to look and see what spring rates it was set up with, but have only good things to say about the KW. Held up to 8+ Canadian winters with salt exposure all winter long with no issues at all. A quick rinse and they still looked great/new.

4 Point 0

In my opinion option 1 is a 100% street only setup.
45/110 is a joke at the track. The front end will collapse.

A stock GTS is 33/108 and the body roll at the track is horrendous. The dive you will experience under braking is awful.

Option 2 is 90/190. My car is hardcore track and I am running 120/170. I also have tractive and dsc to help with street comfort.

My recommendation for your 70% street and 30% track was 100/150.

You could take their 90 front as that is close enough to 100, but their rear is far too stiff, especially considering your 70% street. Its stiffer than my 80% track.

90/140
90/150
100/150
100/160

will all yield great results for you.

I originally ran 75/150. Great on street, no good on track. Front fell over with 75. The front needs more attention.

YMMV. But i have tried a lot of rates. 190 is not 70% street friendly, unless you have all silky smooth roads and even tracks.

spdracerut

I disagree, it is not an illness but in fact the cure! We are all unique. Why settle for a one-size-fits-all?

fsmich

I'm running the clubsport 3-ways with 90 front and 130 rear. About 1000mi/yr street., 1200mi track. it is a good compromise, but definitely biased towards track. The "Lexus" ride over rough pavement at speeds below 40 is gone. At 70 mph on the highway I find it quite comfortable. I run the dampers at KW's performance settings. The street settings are more comfortable, but I'm too lazy to switch back and forth.

4 Point 0

90/130 is really close together for spring rates that are on the softer side of track. The closer together mine are getting, the more I like it as well.

33/108
75/150
100/150
120/170 (I’ll stay here awhile). Our tracks aren’t smooth enough for any stiffer.