HPDE experiments, results and observations

[dparm]

Debris can still enter the car through the open windows. If you have an off or there's contact, things are definitely going to make their way into the cabin. You never know what the asshole in front of you is going to do. I had a car drop an exhaust hanger in front of me earlier this year -- it bounced off my fender and windshield, but could've easily found it's way through the windshield and into my face. I've had tire boogers get flung through the open window and strike my visor too.

Nevermind the risks of fire or other chemicals.

Personally I think it's foolish to not have a suit, shoes, gloves, and a full face helmet with visor closed...but it's your life.

[rhyary]

Originally Posted by dparm

Debris can still enter the car through the open windows. If you have an off or there's contact, things are definitely going to make their way into the cabin. You never know what the asshole in front of you is going to do. I had a car drop an exhaust hanger in front of me earlier this year -- it bounced off my fender and windshield, but could've easily found it's way through the windshield and into my face. I've had tire boogers get flung through the open window and strike my visor too.

Nevermind the risks of fire or other chemicals.

Personally I think it's foolish to not have a suit, shoes, gloves, and a full face helmet with visor closed...but it's your life.

I agree it is a risk, but at the moment I am foolishly ignoring.

At least I wear a mask in the paddock.

[tsk94]

Originally Posted by dparm

Debris can still enter the car through the open windows. If you have an off or there's contact, things are definitely going to make their way into the cabin. You never know what the asshole in front of you is going to do. I had a car drop an exhaust hanger in front of me earlier this year -- it bounced off my fender and windshield, but could've easily found it's way through the windshield and into my face. I've had tire boogers get flung through the open window and strike my visor too.

Nevermind the risks of fire or other chemicals.

Personally I think it's foolish to not have a suit, shoes, gloves, and a full face helmet with visor closed...but it's your life.

You don't need a full suit for HPDE.

If you're not wearing sunglasses or regular glasses with windows open, then yes having your visor down it a good idea.

[rhyary]

Originally Posted by dparm

Can you post a screenshot of the AIM data from when that happened? Show the speed, accelerator, brake, and steering angle channels. If you can also do yaw, that would help.

.

.
Here you go:

[rhyary]

Originally Posted by tsk94

You don't need a full suit for HPDE.

.
Ok, I'll return it.

[tsk94]

Originally Posted by rhyary

.
Ok, I'll return it.

Wasn't even referring to you directly, but you go ahead and do that.

[rhyary]

Originally Posted by tsk94

Wasn't even referring to you directly, but you go ahead and do that.

I misunderstood then.
My bad.

[dparm]

Originally Posted by tsk94

You don't need a full suit for HPDE.

I'll have to disagree. Most clubs don't require it, but it's not like HPDE is immune to incidents. Even a cheap race suit provides some protection beyond what a pair of jeans and long sleeve shirt give.

Safety items on track are a personal choice, of course.

Originally Posted by rhyary

.
Here you go:

Can you post a higher resolution picture?

[tsk94]

Originally Posted by dparm

I'll have to disagree. Most clubs don't require it, but it's not like HPDE is immune to incidents. Even a cheap race suit provides some protection beyond what a pair of jeans and long sleeve shirt give.

Safety items on track are a personal choice, of course.

While I agree that it certainly can't hurt having extra safety items, I'd much rather see the average individual invest in a neck restraint system, 5/6 point harness and roll bar before going to a race suit. I've seen a lot more rolled cars then cars that have caught on fire to a point that fire protective gear was warranted. I get what you're saying, but perhaps we just approach it from slightly different angles.

Like you said, it's personal choice. It certainly can't hurt!

[rhyary]

attached a PDF
I can't see the PDF on my iPhone, but I see it on the computer

[rhyary]

Some tires calculations I am facing:
I am running the front hight at 595mm
This clear the upper fender, barely using 265/35 or 285/30.

The stock ZCP is 613mm. that means I am lowered 18mm.

Reasonable priced R slick - the Proxes 235/35/19 is 20mm shorter than 265/35. So with 235/35 I can lower the car further by 10mm.

How fast would it be lowered by 10mm?

So rubber calculation.
Assume Proxes RR has 230mm rubber on the road (235 minis two grooves)

Width - rain grooves
The 285/30 GY Asym 3 has 221mm rubber on the road
The 285/30 Corsa has 231mm
The 265/36 Cup2 has 239

And the winner from the max performance is the 285/30/19 Ecsta PS91. due to 4 narrow groves it has 250mm rubber on the road. The PS91 was also the fastest road tires with best lap time at NYST.

The king is still the Hoosier 265/35 for most rubber on the road and I am sure the rubber compound.

Obviously there is a lot more to it, and I counted only the longitude grooves, not the latitude ones.

[DRLane]

Originally Posted by rhyary

Some tires calculations I am facing:
I am running the front hight at 595mm
This clear the upper fender, barely using 265/35 or 285/30.

The stock ZCP is 613mm. that means I am lowered 18mm.

Reasonable priced R slick - the Proxes 235/35/19 is 20mm shorter than 265/35. So with 235/35 I can lower the car further by 10mm.

How fast would it be lowered by 10mm?

So rubber calculation.
Assume Proxes RR has 230mm rubber on the road (235 minis two grooves)

Width - rain grooves
The 285/30 GY Asym 3 has 221mm rubber on the road
The 285/30 Corsa has 231mm
The 265/36 Cup2 has 239

And the winner from the max performance is the 285/30/19 Ecsta PS91. due to 4 narrow groves it has 250mm rubber on the road. The PS91 was also the fastest road tires with best lap time at NYST.

The king is still the Hoosier 265/35 for most rubber on the road and I am sure the rubber compound.

Obviously there is a lot more to it, and I counted only the longitude grooves, not the latitude ones.

I'm confused. You're suggesting max rubber contact patch (less rain grooves) = greatest tire? And what does lowering the car an additional 10mm do?

[rhyary]

Originally Posted by DRLane

I'm confused. You're suggesting max rubber contract patch (less rain grooves) = greatest tire? And what fires lowering the car an additional 10mm do?

I honestly don't have answers. I am just reporting my observations and wonder out loud.

More rubber on the road in the dry seems to correlate to speed.

[DRLane]

Originally Posted by rhyary

I honestly don't have answers. I am just reporting my observations and wonder out loud.

More rubber on the road in the dry seems to correlate to speed.

Fair but compound seems to be equally important.

What about the lowering?

[rhyary]

Originally Posted by DRLane

Fair but compound seems to be equally important.

What about the lowering?

Brett from Strom opinionated that 235 is too small and 10mm won't buy me much.

I love talking to Brett, he has 4 E92 M3 on various mod level and he speaks from such deep hands on knowledge. He also say a lot "i don't know" and "I have not tested that" which I like.

I am going to focus on 285/30/19 for quantity track time on max performance such as the PS91 and 265/35/19 A7 or R7 to go fast.

The PS91 285/30/19 @ normal price of $189 on tire rack meets my performance and price objectives .

[admranger]

Originally Posted by rhyary

Brett from Strom opinionated that 235 is too small and 10mm won't buy me much.

I love talking to Brett, he has 4 E92 M3 on various mod level and he speaks from such deep hands on knowledge. He also say a lot "i don't know" and "I have not tested that" which I like.

I am going to focus on 285/30/19 for quantity track time on max performance such as the PS91 and 265/35/19 A7 or R7 to go fast.

The PS91 285/30/19 @ normal price of $189 on tire rack meets my performance and price objectives .

Brett is very fast and very knowledgeable. If you talk to him again, tell him Kirk from Vegas says “hi”.

[rhyary]

I found this on About the RR on the Toyo site.
Might as well put it here:


Toyo Tires recommends the following general setup guidelines for the Proxes RR:

Operating Temperature: 160°F to 220°F
Hot Inflation Pressures: High 30s to Low 40s (psi)
Camber: -2.5° to -5.0°
Caster: As much positive as possible
For recommended mounting and rotation instructions, please click here.

For recommendations on proper use, handling and storage of this tire in colder climates, please click here.

[rhyary]

Stats
Date: Aug 24 2020
Organization: SCDA
Track: Palmer Motorsport Park (PMP)
Weather: Dry
Track Time: 8 x 30min

Tires Front: RE-050A 2019
265/35/19 day 2

Tires Rear: 2013 Yoko V105
2013 day 2

Time: 1:59:00

Comments:
First time at Palmer. Signed up for both Intermediate 1 and Intermediate 2 to get as much time on a new track.

I was oversteering on the slowest turns before adding any significant throttle. Car felt good on the fast sweepers.

Perhaps I should have been more aggressive on the throttle at the slow turns to out wight on the back

Lots of hesitations due to new track and not sure about my rear end.

[dparm]

There's a couple places in that video I would've short-shifted to the next gear and gotten back on the gas. It will keep the car steadier. If you're holding the car at 6 grand with partial throttle, it will be very easy to upset it and you'll lose a lot of modulation.

[rhyary]

Originally Posted by dparm

There's a couple places in that video I would've short-shifted to the next gear and gotten back on the gas. It will keep the car steadier. If you're holding the car at 6 grand with partial throttle, it will be very easy to upset it and you'll lose a lot of modulation.

In general yes, I need to be on the throttle in many places. I am cruising in too many places. And doing it on a higher gear would help.

In fact my best lap, flat 1:59 I was in 4 where in this video I was in third. I did few laps on 4th and 5th and higher gears, but not for the reason you observed.

Back to your point, yes I need to be positive on the throttle instead of neutral and a higher gears allow me to do that and also develop the habit of positive throttle vs. cruising

I am not sure I will be back to Palmer this year, but it is close enough distance to put it on the list for next year calendar.

[dparm]

Use Race Studio to do a simple histogram of the accelerator pedal. You don't want to be wasting time at 30-70% throttle. Either use no throttle (braking or very limited coasting), ~20% for maintenance, ~80% for very minor corrections, or 100%.

[rhyary]

Cool!
Oil Pressure is added to my EVO5 GS display
Alarm set to "less then" 30psi
Still troubleshooting the alarm not going off.

But I could not wait to share

Many thanks for Autocouture for adding this feature. I can't wait to add DCT temperature when I can find the DCT Boss part.

Car is running cold in the picture, not sure what it will be hot.

The goal is to trace oil pressure as I go through corners