Spyerx

So you get the springs right
you get the rear bar right
you get the monorails right
You still have to get to the damper right - has TPC been able to replicate the 4.0 damping with software?

Ohlins still feel better, I'll say that, even though my seat time in a 4.0 is about 30 mins of street driving... it's GOOD. But Ohlins are better.

F1CrazyDriver

gt2-josh

I haven't driven a DSC equipped car. I'd like to check one out but as far as 997s go I think Spyrex is my favorite. I love his car. It's what I would have done to my RS had I kept it. I'm attempting to replicate it now using a narrow body which I prefer. However if Spyrex ever sells his 997 I hope I'm the buyer. JBO

Spyerx

F1CrazyDriver

josh and chris, you lads are missing out.
Thill at one of mooty's day a few years back. Installed oem unit. Did 2 hot laps w/ aim solo. Came in 2 hot laps with TPC DSC. ~avg was 1.5+ seconds difference. Street driving is much better with TPC DSC as well. 1:57 vs. 159, over the top.

p.s. i have not done a track day since - june of last year (last mooty day) -_- fml

Spyerx

Yeah good shocks make such a difference.
I had similar improvement moving from Ohlin DFV to TTX at Buttonwillow, actually more than that. No other changes... just new shocks and same alignment.

we def. have to swap rides once you get it sorted out!

I drive my oil burners on the street, slow car fast is more fun in the canyons :-)

isv

I genuinely don't get how people think the 4.0 handles so differently from the 3.8. It feels a bit different I admit at the rear but not hugely so (and this was very recently having been in a 3.8 again when previously I thought they were practically identical after a back to back drive)

Also per jcastle's picture the helper spring is fully compressed so isn't actually doing anything and that I assume is already with the car jacked up??

gt2-josh

I don't think anybody claimed the handling of the 3.8 and 4.0 are so different. However they are different. And since i'm slow as a slug and my memory isn't so great I can't explain it. However a couple of friends I have no reason to doubt said it is a change and one that makes a meaningful difference. It wasn't as much that the change was sooooooo different then why didn't Porsche implement this change across the GT board earlier. Josh

F1CrazyDriver

i txt mooty (peter is second) as he has the most mileage (on track and street) in gt3rs then anyone i know, asking if i'm recalling incorrectly in big difference between 3.8rs to 4.0rs. He responded, yes totally different car. /end that debate

isv

F1CrazyDriver

two opinions actually. maybe they're different maybe not.
regardless the thread is on the rear springs across all 997 gt models and visually looking at the springs they look vastly different and in my mind, which can be palpable / figment of imagination means different characteristics.

gt2-josh

Maybe the not different crowd can produce a voice from a driver and/or owner who has multiple Daytona Sebring Le Mans starts / wins and explain why it's not different. And since I know that won't happen at least in this case I'll continue to maintain that there is a difference. On one hand we have Mooty, Editor of leading Porsche Magazine and Professional Race Car driver and on the other hand we have all of the ROW. I frankly don't care if it's different or not but I'm glad it is. I don't understand why a few cranky posters want to prove there no difference. JBO

Mr. Adair

Sorry to hi-jack the thread but what I really want to know is, how much better damped is a TTX setup or a DSC setup over stock on the street? I certainly know how well high end suspension components work in snow machines and motorbikes. I do not mind stiff cars as long as they do a good job on high frequency/sharp bumps. I have a feeling they are better than a stock 3.8? Any thoughts?

gt2-josh

I'll take a quick crack before the wife wakes up. First depends what is the primary use of the car. No need for overkill. Second did you graduate first in you class at MIT or do you crew for Joest? A four way adjustable custom Penske setup is....overkill. I don't believe it's possible to answer your question without further info. JBO

isv

Ok now perhaps I have no clue how to drive and all the other people I know who do track their cars regularly also have no clue but personal experience of my own 4.0 and 2 other 3.8RS is in no way similar to what has been claimed in the thread nor has those I know who have driven both. Namely - ""The 4.0 drives hands down leaps better then .1,RS and .2,RS"" and "" totally different car. ""

Maybe it's cranky to observe my own experience is very different. Fair enough.