996toomey

Did anyone read the article on the new C4S in the new Excellence magazine? They talked about the feel of body movement on the soft bushings. Called it a little unsettling, they said only applied to PASM cars and not cars with sport suspension. I think I read a post on that from someone here. Any 997S owners feeling that sensation like the body is shifting on the bushings at speed?

Thanks.

rss997

I could not get passed all the freaking ads...first 50 pages were all ads and little content.......

996toomey

rs997:

You don't have the pasm on your car do you? I've read your posts and seems you enjoy a spirited drive and would have noticed the movement.

FredGarvin

I posted my thoughs on this about five months ago and everyone thought I was crazy: "Learn how to drive" was the most common response. Well, hate to say I told you so. Here is a paragraph from the Excellence review:

"We noticed one minor handling woe in two PASM-equipped test cars. Turning into sweeping bends, the seat of our pants gave both Editor Stout and I the feeling that the tires were gripping well but that the body was moving laterally on its rear bushings. It didn’t threaten to do anything untoward, but it was the kind of subtle, unsettling glitch that shakes your confidence a bit. Subsequent time with 997s — both in the U.S. and Europe — has confirmed our initial concern. Worse yet, several friends of the magazine with 996s, GT2s, and GT3s have noticed it in 997s, too."

God it's hard to be humble....

Ray G

I have felt that too. I posted about it way back too: click here

It's kind of scary the first time you feel it.

krC2S

Wow thought it was just me but didn't you feel this in earlier cars( this is my first p-car) ?

isnt it just the weight distribution from a rear engine?

996toomey

Thank you Fred Garvin, Ray G, krC2s:

I knew I had read this here in the past. Have you done anything to correct this. Is it a mild shift or a major concern? I never felt that kind of thing in my 02 996 and am a little concerned with my 06 997S order.

Thanks.

titleist1

I had this happen to me when car was new but have not had it happen lately, car now has @ 4K miles, it may still occur but just have not felt it of late.I agree it is not fun when it does occur.

OCBen

I haven't felt this yet, but then I really haven't driven it that hard in turns either to notice it. For those of you who have, is it like a slip from excessive play that stops when the limit of travel is reached? I'm trying to picture this, and I'm imagining for the sake of simplicity that the rear axle is a straight shaft connecting the rear wheels and the body is mounted onto the axle via bushings that have excessive clearance on either end - kinda like the simple plastic toy cars we used to have as kids. Remember those? A straight shaft connecting the wheels and the plastic body able to float side to side due to the excessive play.

Okay, so if I hear you guys correctly, when you take a hard left turn the rear end feels like it slips to the right on this imaginary straight axle until it hits the stop on the right wheel? And when you take a hard right, it slips to the stop on the left wheel? And when taking quick successive lefts and rights without hitting either stop the rear end feels like it's floating side to side a bit?

texas911

I've had it but thought it was PSM kicking in! Hmmm, will have to take it to the next DE to see what it's really all about.

996toomey

OcBen:

That explanation sounds about right the way I read the article. They said the bushings are soft and until they are fully compressed you get the movement. Also said in the article that the -20MM sport suspension cars did not have the same movement. I had never felt anything like that in my 02 996 and had it to speeds in turns where I would have if it was there.

OCBen

Hmmm, I'm sure the Porsche suspension engineers are aware of it by now. I wonder if there will be a recall issued to replace the faulty components? Stay tuned.

OCBen

I'm also wondering now if instead of a sliding slip, if it's not more a springy, squishy, "marshmallowey" feel to it, as though coil springs are in place on the axle to take up the excessive play in my example above.

Paul523

June build 2006 S coupe, fwiw last night did some cornering close to grip limits--including a few slightly negative-camber bends, don't know how to describe it but can't say I felt anything other than rock solid progressive, predictable lateral force.

Maybe the lateral heave others have experienced is PSM application in initial stage?-- if the brakes were PSM-applied to one or two wheels for an instant, could it create momentary perception of the back end pushing out/ sensation of-- but not actual-- oversteer... gotta try another run.

OCBen

Stan, have you posted pics of your Slate Grey S? Would love to see some, as I'm sure many others here too. That's an awesome color. I had it on my order at first but later changed it.