Sounds like you had a great time, PIR is a fun track!

I wonder if you not having SPASM and the front lip is causing a bit of the light front end...?

 

yea I was running around 40s hot on my hoosier back on my last car, but wasn't sure about PSI on the 20s, should of check with the track pros on here first..haha

Nxt time will adjust to 40 hot for sure

 

lesson learn looking to pick up a set of 19s for next track event

 

Tks for the tip, I am picking up a set of 19s for track shorty

What 19s tire width are you running on your car and PSI cold?

cheers

 

Yea thats what I found out after turn 12, a slight delay and confuse with the PDK

 

yea PIR is pretty fun track, i think its due to the tire pressure

I think I seen your white 991s around Richmond and Van area? There isn't much 991s around Van so far, only seen a white one and a dark navy vert and one black coupe around.

 

One thing you didn’t mention that drove me nuts. The buffeting! Hold crap. It is like flying in an airplane with the door open. It doesn’t matter if you have the passenger’s window all the way down either. Next time I am going to try a piece of 3M and string it from the mirror to the front window. Hopefully that will disrupt the airflow enough.

Marc

 

haha yea, lucky I can keep the windows all roll up and use turn signals for pass bys If I have to lower the windows I can't concentrate as good with that buffeting noise

 

That should work, but you may lose the tape at high speed.
The best solution will be to order the GT3 mirrors when they'll become available...

 

Some thoughts from my experience tracking 991s.
1. Buffeting: I always address it with the chief flagger and tech chief prior to going on track and haven't had my solution rejected yet, which is to crack the roof open a touch (the middle button on console). If you describe it as a safety issue (having your car shake violently) they will play ball trust me - worked for me at limerock, the glen, NJMP etc.
2. I think the Pirellis work pretty well on the track. As others have noted, temps matter a lot. Of course track tires are even better (I just got my first pair - 888's and am loving them!). Your driving style will also determine how much you stress the Pirellis, as will whether or not you have PDCC.
3. With the 991 especially, extra pads on hand are a must - the car eats through them, especially in the rear.

 

I brought this point up when the 991 PDCC and PTV and other electronic aids was first announced. These systems have to be putting wear and tear on the pads, shocks, and tires more so that a car without.

its the price you pay for increased performance.

I would assume a 991without them would give longer life to brakes and consumables, but at the expense of longer lap times.

 

Great idea bout asking. I have before and they alwasy said no. Never thought to phrase it that way. Thanks

I beleive it eat the rear pads because stability is on and it uses them to control the yaw.

 

Once they asked me to take the chief instructor on a couple laps so he could see for himself. So that's another option if they seem hesitant at first. One guy said he's hesitant bc it's an issue if the belts catching the roof, but once I explained I'm running the stock belts, he agreed.

Re the rears, yes it's the PTV at work.

 

You are correct about the pads going faster bc of the tech aids. I don't min terribly since I've been changing my own pads trackside if need be and they are v easy on the rotors. Of course when the pagids come out soon it will be a Jon-issue.
The tires on the other hand last longer with PDCC. There is no longer risk of cording edges and the wear across the tread is even.
Shocks i don't know but I doubt the change is material.