997.1 GT3RS stability @ high speed
#1
997.1 GT3RS stability @ high speed
My car is new to me, or should I say I'm new to my car? I have had my car up in the 150's w/no issues (but not making any turns or lane changing) I'm used to being at speed as I've had other fast cars and live in a rural area and know many of the cops.
Ok, this time I ran the car up the the gears (mainly just to hear the sweet sounding exhaust) then, well I had an experience I did not expect. I was on a downhill section of a two-lane rural highway and came up on a slower moving car (really?) and had to go around the car (obviously) and my car felt very unstable and twitchy at around 135...
It felt as I almost drifted into the car I was passing. Were my steering inputs to drastic for this car or does it tend to be a sensitive car at high speeds? I'm the second owner w 5k on the clock and it does seem to be lower than stock and may have a race spec alignment, but I don't think so... I'm gonna slow down till I get this bear on the track and see whats up... J
Ok, this time I ran the car up the the gears (mainly just to hear the sweet sounding exhaust) then, well I had an experience I did not expect. I was on a downhill section of a two-lane rural highway and came up on a slower moving car (really?) and had to go around the car (obviously) and my car felt very unstable and twitchy at around 135...
It felt as I almost drifted into the car I was passing. Were my steering inputs to drastic for this car or does it tend to be a sensitive car at high speeds? I'm the second owner w 5k on the clock and it does seem to be lower than stock and may have a race spec alignment, but I don't think so... I'm gonna slow down till I get this bear on the track and see whats up... J
#2
This car is very stable at speed (130mph+) when there is no dramatic input changes, on the track. It tends to affect by high cross wind more than some of the lower profile cars. The steering is sensitive to alignment, and off alignment makes the car drives funny. The NSX can have higher tolerance on mis alignment and the car still turn in nice and stable.
#3
The only thing I can add is that if you are driving at, around or above 135 on rural roads - especially with other traffic - you're a frickin menace. Sorry but you need to grow up before you hurt or kill some unsuspecting normal driver.
#6
Jaxxon,
from what youre describing, i'de bet your alignment is off.
my car does the same thing when my camber in the rear is off on one or both sides.
also, make sure tire pressure is the same left to right..
also, make sure you STAY ON THROTTLE when turning, or swerving.
from what youre describing, i'de bet your alignment is off.
my car does the same thing when my camber in the rear is off on one or both sides.
also, make sure tire pressure is the same left to right..
also, make sure you STAY ON THROTTLE when turning, or swerving.
#7
In order, quick check of:
- tire pressures
- how old are tires, are they matched and do they have sufficient tread (yes, i've seen mismatched tires on GT3's before)
- alignment
- nut behind the wheel (both steering inputs and speed on public roads)
To join the line of finger waggers 135 on public roads, regardless of who you know, is nuts. Aside from the unwilling participants in your speed adventures (other drivers), I have to imagine there are critters given you live in a rural area. Ever seen what happens to a car when it hits a deer or raccoon at 60, let alone 135? Find a track in your area and drive "flat out"
- tire pressures
- how old are tires, are they matched and do they have sufficient tread (yes, i've seen mismatched tires on GT3's before)
- alignment
- nut behind the wheel (both steering inputs and speed on public roads)
To join the line of finger waggers 135 on public roads, regardless of who you know, is nuts. Aside from the unwilling participants in your speed adventures (other drivers), I have to imagine there are critters given you live in a rural area. Ever seen what happens to a car when it hits a deer or raccoon at 60, let alone 135? Find a track in your area and drive "flat out"
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#9
It was a one or two time [run it up through the gears, just got the car dealio] So Mr. Sunshine on my Shoulders, you waited to get on the gas until you got to the track? If so, you have a lot more restraint than 90% of us on this site. These cars run up to 135 before you know it...
So yes it's the last time I'll get on it on the street BUT I will never grow up.
Now back to the twitchiness, thanks Steve K ny's for your alignment hypothesis - The GT3RS is getting an RSS adjustable rear link and rear tow kit, a 2-peice lower control arm kit and with that obviously a track spec alignment... so that stuff should iron the alignment theory out.
Last edited by jaxxonR8; 08-02-2012 at 03:36 PM.
#10
Said the guy that always drives the speed limit.
#12
I think you handled the lashing pretty well...it was all meant in the right way (I think)...as someone else said...who here hasn't taken a car through the gears in an excessive way..it's all about when and where, using good judgement. I too have opened my car up to 150 mph..but on the almost totally deserted wide open highways here in AZ...because yes, you can blow a front tire at 75 mph and roll your car...much less at 100 mph. Hope the RRS rear links and tow kit eliminate the issue for you, they are my short list as well.
#13
Don't post things to see your own print. There's no comparison to driving over the speed limit and slowing down to overtake at 135 on a public roadway.
Last edited by denversteve; 08-02-2012 at 08:15 PM.
#14
I was on a smooth road in BFE, accelerating my newly acquired STB track dedicated GT3RS to a maximum speed of 135 (the 150 was a different day) Came up over a slight hill transitioning to a downhill and 996 cab appeared out of nowhere (driving quite slow) so instead of hammering on my lifeless PCCB's, I stayed on it so the driver of the 996 Cab wouldn't see my plates and call for backup.
#15
I DO drive near speed limit at 10 mph over. but that's just me
no one caravan with metro trk anymore lol
jaxon, I think unless ur steering input was too quick (unlikely since u used to ride superbikes and still alive to tell about it: u know what abrupt will do) ur alignment is off. chk rear toe. also did u lift at all? with that speed and any steering input add some road imperfection ur nose would get light. then u subconsciously lift causing rear to move. just guessing
but rs is very stable.
no one caravan with metro trk anymore lol
jaxon, I think unless ur steering input was too quick (unlikely since u used to ride superbikes and still alive to tell about it: u know what abrupt will do) ur alignment is off. chk rear toe. also did u lift at all? with that speed and any steering input add some road imperfection ur nose would get light. then u subconsciously lift causing rear to move. just guessing
but rs is very stable.