ORIGINAL: 944 man
Having watched the clip now, I recognise the circuit/corner, which is a common place for an off, I believe? The last clip I saw involved an E36 3 series which impacted hard on the inside barrier a little further on, destroying the car and leaving the camera somewhere in the scenery recording until a marshal found it.
Well spotted Sir! Give that man a Gold Star. Indeed this is exactly what was running through my mind as it started to get light and I started to lose traction. I realised that I was in for some trouble and all I could think of was not to let it snap back inside like that BMW. People have said I've over corrected and indeed perhaps I did, but there was an underlying reason for this which you've ably pointed out. What I'd like to know and didn't have in my arsenal, was should I have tried to rotate the car to curb a lot more off the speed? My trepidation is based on not knowing how much that would have risked flipping the car. So indeed I just rode it out knowing it wasn't going to be pleasant. Subsequent data pulled out of the car from the engineer suggests we might have had some suspension setup issues:
"Hi Patrick
I've been analysing some of the data in more detail and what I have discovered is the following.
We have been using 45mm of rear damper travel at the track. This probably equates to around 70mm of wheel travel.
Unfortunately the car needs to have more droop travel through some of the higher G force turns. The inside rear wheel is lifting off the ground, this is the jacking effect that Paul was talking about, at the time we thought it was being caused by too much rebound damping and we removed some.
Factory setup have the droop controlled by the bolts retaining the outer torsion bar bush, your application probably has the rear droop controlled by a spacer above the piston within the damper so some damper or rear suspension setup mods will be required before the next outing.
If you look at the data particularly suspension position [position each corner in a new graph on the page] you will see that the lr suspension pots flat lines during some corners at around -22.
At this time the rear wheel is starting to lift of the ground and the rear will start to become unstable.
Your video also confirms this as you have to correct your line on entry , you were travelling 16 klms quicker than the previous lap and the gpsmap shows you wider on entry before the apex which all added to the event.
The rear end appears to be rolling more that the front but a more accurate measurement of motion ratios would be required before you could call this a fact.
Everywhere that the lr suspension starts to bounce off the full droop point is where you were complaining about a lack of rear grip so we need to rectify this before next outing.
If there are no spacers within the damper then we may need to get extended rose joints, Im a bit surprised that this has occured given that you bought the dampers to suit this application.
Mark
Rsport Race Engineering"
]
