2014 86CUP Challenge to NorCal with NCRC

[ddeflyer]

Originally Posted by themajesticone

Hey guys - here are a couple laps from my last session this past weekend. First track day ever. Any criticisms? Unfortunately I didn't have that app to measure my speeds but hopefully you can still get an idea if my pace was decent. thanks!

So your issues look like the common ones:

1. You are turning in early alot. This can be very dangerous; late apexes will keep you safe until you build more skills.
2. Don't steer to the apex. The mid corner corrections will upset the car as you go faster and can cause you to spin. It is better to loose some time by being off the apex than to be muscling the car onto it.
3. Smooth your steering inputs. Several times I get the feeling that you are doing quick steering inputs.
4. You paid to use the whole track so use it (ie. you are pinching turns/not tracking out)

[ddeflyer]

Originally Posted by sw20kosh

Get an instructor to ride with you when ever you can. I still do and I've been at this for a few years. Always learn many new/better behaviors/lines from a good vocal instructor like Bill from NCRC.

I agree 10,000%

Get the event's instructors when you can and have people ride with you and also be a passenger when you can. You will pick up alot of great information that way.

[acx23]

Just putting it out there - I'm more than willing to give rides to anyone to wants it. I'm in Open Group so you can still ride passenger without missing your own session. I'm not a good passenger, but I'm also willing to ride with you for about 3-4 laps before I get dizzy.

Not stating that I'm better or anything... just trying to help.

[mkivsoopra]

Originally Posted by ddeflyer

You could post the log file and session/lap to look at, then we can look at the data and the video! That said I notice that the front of your car is doing a very strange motion before the rear came out (looks bouncy right to left. I don't remember who it was that said they had weird suspension issues but if that was you then maybe that could be part of it? or maybe it was TC). Seeing that with the data logs could be very, very informative.

Yes, that was me! And very sharp eye for noticing that in the video. Something is up with my suspension. The car dances around in high speed corners. It's scary. I'm hunting down my stock parts to go back to stock suspension for now.

What format should I use for the datalog export?

[ddeflyer]

Originally Posted by acx23

I've only successfully got the pedal dance to work for me once. The car has to be warmed up or it will not work. I've ran all year (~10 track days) with just turning the traction control off by holding it down for 5 secs. I've read arguments that it doesn't turn off the traction completely but I don't think it's true. I had zero interference just by turning it off complete.

Both the e-diff and the EBD remain on with traction control turned off. The e-diff is really not very intrusive and the EBD is really good unless you really know what you are doing as a rear biased car is much trickier to handle (I played with the pedal dance at an autocross and yeah, be ready for the rear end to move alot under trail braking).

[ddeflyer]

Originally Posted by mkivsoopra

Yes, that was me! And very sharp eye for noticing that in the video. Something is up with my suspension. The car dances around in high speed corners. It's scary. I'm hunting down my stock parts to go back to stock suspension for now.

What format should I use for the datalog export?

For me the best is the native format so I can load it into the aim software. I don't know about others.

Also that bouncing could be what caused your issue...

[acx23]

I was looking for a way to turn it off via a button or something, but no bueno I might look into again when I have a chance.

Originally Posted by ddeflyer

Both the e-diff and the EBD remain on with traction control turned off. The e-diff is really not very intrusive and the EBD is really good unless you really know what you are doing as a rear biased car is much trickier to handle (I played with the pedal dance at an autocross and yeah, be ready for the rear end to move alot under trail braking).

[ddeflyer]

Originally Posted by acx23

Just putting it out there - I'm more than willing to give rides to anyone to wants it. I'm in Open Group so you can still ride passenger without missing your own session. I'm not a good passenger, but I'm also willing to ride with you for about 3-4 laps before I get dizzy.

Not stating that I'm better or anything... just trying to help.

I gladly give rides and am happy to be an passenger for anyone that wants one. I'm in point-by right now but I don't know how long that will last...

Also, yeah, I am just another person on the track and while I have ideas/suggestions, everything I (or anyone else) says should be carefully considered before application. I'm not an instructor, I'm just someone who tries to be helpful. I might give good ideas/advice, or what I say might be crap.

[mkivsoopra]

Originally Posted by ddeflyer

For me the best is the native format so I can load it into the aim software. I don't know about others.

Also that bouncing could be what caused your issue...

Ok, hope this works... still trying to figure out all the AiM software stuff. It's lap 5/1 in the set. Thanks!

[ddeflyer]

Originally Posted by mkivsoopra

Ok, hope this works... still trying to figure out all the AiM software stuff. It's lap 5/1 in the set. Thanks!

For some reason the GPS data isn't included so I am really guessing on some of the data. That said I see some vertical movement going on I think around turn 7. I have some matching but smaller amplitude movements on my data. A bit after this I see signs of the traction control coming on (small increase in brake system pressure).

My very poor guess is that your suspension issues upset the car enough to cause the traction control to come on which then behaved in a bad way to the TC's confused attempts to help the car. That said I'm not even certain exactly where the bits of the graph fall on the course because of the lack of GPS data.

[Chopstick]

[ame="https://www.youtube.com/watch?v=GM7jneocw-k&list=UUanSo7bDb7OXb2QC07Swe9Q"]https://www.youtube.com/watch?v=GM7jneocw-k&list=UUanSo7bDb7OXb2QC07Swe9Q[/ame]

This was one of my cleaner laps this weekend at Thill. Any ideas on how I can pick up some time? I i couldn't improve on my PB, but I feel like my lines are a lot cleaner than before. I think need to dial in some more front camber because the car understeers A LOT.

Thanks in advance for any input!

[ddeflyer]

Originally Posted by Chopstick

This was one of my cleaner laps this weekend at Thill. Any ideas on how I can pick up some time? I i couldn't improve on my PB, but I feel like my lines are a lot cleaner than before. I think need to dial in some more front camber because the car understeers A LOT.

Thanks in advance for any input!

Was that a 2:17 lap on the bypass? If so, not bad.

Some small things:

For 9, try staying in fourth and let the car track left before coming back right.

You are pinching turn 12a or whatever it is called (exit of the esses). Let the car track right so you don't scrub as much speed.


You are also adding steering in some turns in an odd way. This is decreasing your traction and slowing you down some. There are some places where this can be a valid technique to trigger oversteer for thrust angle, but I think you are doing it in places you don't want to be (turn 1 for example).

[sw20kosh]

Originally Posted by ddeflyer

Was that a 2:17 lap on the bypass? If so, not bad.

Some small things:

For 9, try staying in fourth and let the car track left before coming back right.

You are pinching turn 12a or whatever it is called (exit of the esses). Let the car track right so you don't scrub as much speed.


You are also adding steering in some turns in an odd way. This is decreasing your traction and slowing you down some. There are some places where this can be a valid technique to trigger oversteer for thrust angle, but I think you are doing it in places you don't want to be (turn 1 for example).

I would not stay in 4th for 9 which is uphill. Especially if NA. You need acceleration up that hill. Use gravity to gain grip in this turn (you can take it a lot faster than you think kinda like turn 1).

[acx23]

Your car looks pretty set up. Here's what I saw -

T1 - get closer to the left apex and track out more on the right.
T2 - you started hugging left about a second too early. that's why your exit was messed up.
T6 - turned in about 1/2 - 1 second too early. again, that messed up your exit.
T11 - no need to get into 2nd gear, just stay in 3rd. unless you're in traffic or something.
T14 - i feel you can wait another split second before turning it, going into the run off that much to the left kills your time too.

Hope this helps.

Originally Posted by Chopstick

This was one of my cleaner laps this weekend at Thill. Any ideas on how I can pick up some time? I i couldn't improve on my PB, but I feel like my lines are a lot cleaner than before. I think need to dial in some more front camber because the car understeers A LOT.

Thanks in advance for any input!