Carreralicious

Curious what folks who have the sport button or that shock absorber button if they prefer to use that feature when on the highway at higher speeds. I usually press the shock absorber button that firms up the suspension but doesn’t change the throttle response (I don’t like that feature actually) when on curvy mountain drives but have the car on the normal softer setting when on the highway but wondering if it makes sense to firm up the suspension when at higher speeds on the highway.

Does it make the car more stable at high speeds (I’m talking over 80mph) or no? Thoughts? What do you guys do? For some reason, when I tried it myself, it seemed that the car was more jittery with the firmed up suspension and I had to pay more attention.

Petza914

I usually press the sport PASM button when I'll be running 90 mph or higher for sustained periods. I have TPCs DSC module so it's really for a more planted feel when running straight with low G forces as the suspension stiffens itself for turns.

Carreralicious

Ah, ok thanks. I don’t have the DSC module but will try it again in sport as I recently changed tires to the Michelin PS4S which seem much better riding than the Bridgestone N1 tires I had on previously.

jamesinger

I like the sport button throttle map at highway speeds. I do not like it when shifting or starting from a stop as much. The stock PASM has A LOT of overlap, so when you press the button, it starts stiffer and is in a stiffer range BUT I would bet $5 that once you are ripping in normal mode, your PASM is very close, if not identical, to the sport mode depending on telemetry. I really like when I am in a tighter canyon at lower speeds and I can feel the PASM working. I noticed my rear will skip a bit in sport whereas in normal, it will suck more roots and other bumps up a bit more. On dirt and gravel, I am always in normal.

Bruce In Philly

2009 C2S 192K miles

I can't find the mappings for the life of me, but I remember what it looked like... sports was the same stiffness curve just shifted to the right (more stiff). Do whatever is more comfortable for you. Honestly, highway driving is really just a straight-line affair.. not sure why you would want it super stiff.

I started putting mine into sport on the turnpike (before I installed the DSC module) because the car was rocking on undulations.... here I discovered the rear shocks were leaking and therefore were becoming soft.

Peace
Bruce in Philly (now Atlanta)

Liste-Renn

So many variables to consider...

I use my PASM button (with DSC controller) all the time to A/B sample the ride depending on the road surface condition/curviness, speed, and X-winds.
And if I am passing cars with linked lane changes (resulting in a double chassis upset) that might not occur in harmony with the road layout.
Those lane changes, such as when skirting/slaloming between overtaken traffic, can demand enhanced roll control even on a straight line interstate.

That is the beauty of having a switch controlling the active suspension system. (Same with the PSE.)
Simply select whatever mode works optimally at the time. Stiff/soft (or quiet/loud).
The DSC box has allowed me to run in the PASM SPORT (stiff shock button setting) far more often than I did with the OEM controller. It is PFM on a 997.2.

I also prefer the SPORT mode revised throttle mapping for my most agressive canyon driving. Heel and toe becomes a surgical move rather than a stomp roll when matching revs on downshifts.

(I also turn OFF the PSM when negotiating slow hairpins and switchbacks to allow some throttle tail pointing. Not drifting, but rather rotating the car with induced yaw rather than large steering inputs. The PSE remains armed, but only intervenes when sensing BOTH front wheel ABS activation. Otherwise, you are free to drive nanny-free... like you stole it!)

swish77

I don't have PASM, but I use that "Sport" button almost all of the time in my '05 base MT after the car gets warmed up. It's a night and day difference, especially on twistys and backroads. A lot more giddy-up. On highway trips with sustained speeds sometimes I turn it off, but very reluctantly. I specifically wanted a base with the chrono package just for that little button.

I'm jealous. Where in the U.S. can you go 90 mph and above for sustained periods without getting in trouble?

Petza914

In SC - land of the free of course - no vehicle inspections, zero deductible glass replacement, no salt to eat our cars, open carry, and plenty of mostly open roads to misbehave on, but lots of places actually.

My 997 hits triple digits just about every time it leaves the garage - the other cars not quite as much.

Daylight, Waze, and Escort detector is a fairly powerful combo...for example:

Good news is I've high-speed tested any parts or mods I discuss on here.

swish77

​​​​​​
Wow. I'm moving. I hear Charleston is nice. CT ain't nearly as free, although I can still open up the 911 if I'm careful when and where.

THE Z MAN

what escort unit do you have?

Petza914

Max or Max 2 (don't remember which) but it's the one with the directional arrows. Have that one in 3 of my cars actually and it's so much better than the V1 I have in another of them.

Liste-Renn

I have driven Interstate 15 between LA and Vegas about a dozen round trips.
At night, like after midnight, I have NEVER seen an LEO.

Waze occasionally alerts, and I slowed down at first.
Not anymore.
I can cover 210 miles in less than 2 hours, easy.
Best was 1+45.
Do the math.

Only the semis overtaking one another on a long uphill grade (the stretch includes a pass) create a bottleneck. The resulting backed up cars jockey a bit for the lead after the Moving Road Block ends. Sometimes there is a serious exhibition of speed sorting our who will lead the resulting "peloton". I've seen 155 (briefly) before settling down to 115 as a comfy cruise speed.

My 997 GTS is loafing at that velocity and actually gets decent gas mileage.
It's the acceleration up to speed that sucks petrol, not steady autobahn speeds.

@Petza914, good on ya for finding a way to uncage your beast.
55-75 on an interstate is a joke in a 997.