follow ft86club on our blog, twitter or facebook.
FT86CLUB
Ft86Club
Speed By Design
Register Garage Members List Calendar Search Today's Posts Mark Forums Read

Go Back   Scion FR-S Forum | Subaru BRZ Forum | Toyota 86 GT 86 Forum | AS1 Forum - FT86CLUB > Technical Topics > Tracking / Autocross / HPDE / Drifting

Tracking / Autocross / HPDE / Drifting What these cars were built for!


User Tag List

Reply
 
Thread Tools Search this Thread
Old 06-02-2016, 01:09 PM   #43
renfield90
The Stig's German cousin
 
Join Date: Mar 2013
Drives: 2013 FR-S
Location: Tempe, AZ
Posts: 1,036
Thanks: 133
Thanked 471 Times in 317 Posts
Mentioned: 8 Post(s)
Tagged: 2 Thread(s)
Quote:
Originally Posted by Pat View Post
When I started at 24 psi cold, it took two to three laps for them to come in, as expected. Then I would get maybe three laps of really good grip. But after that they would start to go away noticeably. They just seem to give up once they get hot. It's really a frustrating experience. Although not as frustrating when they are at 29 hot compared to 35 hot, that's for sure.
I think I'd be significantly happier with the R1. I just don't think the S version is well suited to extended lapping sessions. What do you guys think of that?
The S stands for Sprint. It's actually marketed specifically for time attack or time trial.
renfield90 is offline   Reply With Quote
The Following User Says Thank You to renfield90 For This Useful Post:
Pat (06-02-2016)
Old 06-02-2016, 01:13 PM   #44
e1_griego
Senior Member
 
e1_griego's Avatar
 
Join Date: Jul 2015
Drives: Many
Location: Independence, Ore.
Posts: 502
Thanks: 151
Thanked 273 Times in 157 Posts
Mentioned: 7 Post(s)
Tagged: 2 Thread(s)
It's the Hoosier A-compound competitor, or at least was when introduced. They fall off dual driving in autox for 10 runs -- can't imagine they're happy to do a 20min session on track.

Yes, you need a hoosier r7 or BFG R1.
e1_griego is offline   Reply With Quote
The Following User Says Thank You to e1_griego For This Useful Post:
Pat (06-02-2016)
Old 06-02-2016, 03:44 PM   #45
Pat
Senior Member
 
Pat's Avatar
 
Join Date: Feb 2014
Drives: 2014 BRZ
Location: Denver, CO
Posts: 1,226
Thanks: 932
Thanked 717 Times in 412 Posts
Mentioned: 28 Post(s)
Tagged: 2 Thread(s)
Garage
Quote:
Originally Posted by e1_griego View Post
It's the Hoosier A-compound competitor, or at least was when introduced. They fall off dual driving in autox for 10 runs -- can't imagine they're happy to do a 20min session on track.

Yes, you need a hoosier r7 or BFG R1.
Thanks. I am learning this. I've never had a tire in this class before so it's all new to me. It certainly isn't my first choice given how I use the car, but I got a set from a friend for cheap so figured it was worth a shot.
Pat is offline   Reply With Quote
Old 06-02-2016, 04:11 PM   #46
e1_griego
Senior Member
 
e1_griego's Avatar
 
Join Date: Jul 2015
Drives: Many
Location: Independence, Ore.
Posts: 502
Thanks: 151
Thanked 273 Times in 157 Posts
Mentioned: 7 Post(s)
Tagged: 2 Thread(s)
If you've got antoher cheap set I'm looking for take-offs

hahaha.
e1_griego is offline   Reply With Quote
Old 06-03-2016, 05:30 PM   #47
dradernh
Senior Member
 
Join Date: Feb 2014
Drives: Used to Drive:Grand-Am GS #54 E36M3
Location: So. OH
Posts: 561
Thanks: 77
Thanked 237 Times in 163 Posts
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Pat View Post
Thanks. I am learning this. I've never had a tire in this class before so it's all new to me. It certainly isn't my first choice given how I use the car, but I got a set from a friend for cheap so figured it was worth a shot.
Just came across this thread, and had the following thoughts:

0a) To determine the optimum tire pressures for your car and your driving, take tire temperatures with a probe pyrometer, and take them as instructed by the pyrometer manufacturer. Unless blessed with unusual talent, there is no shortcut.

0b) For road courses, the manufacturer's recommended pressure ranges virtually always apply. This assumes a conventional-style setup and driving, which you have. Anecdotal autocross data is not likely to be useful in this regard.

1) "[as of 2015] They are four years old..."

Throw 'em out and get something fresh(er). I say this as someone who has many hundreds of laps on these tires, in time trials and in extended time trial practice sessions.

These are 4-5 HC tires to start with, and with a noticeable change in response from HC to HC. They may be approaching hockey puck status by now. Use the fingernail test to verify current softness. You could use a durometer, but you'd need base data for comparison.

2) Above 80-degrees ambient, these get pretty iffy for road course work. I should have, but never checked track surface temps to correlate the two (i.e., track surface temp is the data point that governs).

3) Yes, that was OPR.

Have probe pyrometers been mentioned yet? Seriously, the probe pyrometer will speed your way through the minefield. I use this one because it will record a full set of twelve temps and four pressures in one pass around the car: http://www.longacreracing.com/produc...21&prodid=7339. It will pay for itself with a better set-up car.

You can find the pyrometer/pressure gauge for $100 off in Longacre's refurb catalog, which is where I've bought every piece of Longacre equipment that I own. It's on page 16: http://www.longacreracing.com/Userfi...BC_catalog.pdf. Grab it before someone else does!

Last edited by dradernh; 06-04-2016 at 02:11 AM.
dradernh is offline   Reply With Quote
Old 06-04-2016, 12:10 AM   #48
Pat
Senior Member
 
Pat's Avatar
 
Join Date: Feb 2014
Drives: 2014 BRZ
Location: Denver, CO
Posts: 1,226
Thanks: 932
Thanked 717 Times in 412 Posts
Mentioned: 28 Post(s)
Tagged: 2 Thread(s)
Garage
Quote:
Originally Posted by dradernh View Post
Just came across this thread, and had the following thoughts:

0a) To determine the optimum tire pressures for your car and your driving, take tire temperatures with a probe pyrometer, and take them as instructed by the pyrometer manufacturer. Unless blessed with unusual talent, there is no shortcut.

0b) For road courses, the manufacturer's recommended pressure ranges virtually always apply. This assumes a conventional-style setup and driving, which the you have. Anecdotal autocross data is not likely to be useful in this regard.

1) "[as of 2015] They are four years old..."


Throw 'em out and get something fresh(er). I say this as someone who has many hundreds of laps on these tires, in time trials and in extended time trial practice sessions.

These are 4-5 HC tires to start with, and with a noticeable change in response from HC to HC. They may be approaching hockey puck status by now. Use the fingernail test to verify current softness. You could use a durometer, but you'd need base data for comparison.

2) Above 80-degrees ambient, these get pretty iffy for road course work. I should have, but never checked track surface temps to correlate the two (i.e., track surface temp is the data point that governs).

3) Yes, that was OPR.

Have probe pyrometers been mentioned yet? Seriously, the probe pyrometer will speed your way through the minefield. I use this one because it will record a full set of twelve temps and four pressures in one pass around the car: http://www.longacreracing.com/produc...21&prodid=7339. It will pay for itself with a better set-up car.

You can find the pyrometer/pressure gauge for $100 off in Longacre's refurb catalog, which is where I've bought every piece of Longacre equipment that I own. It's on page 16: http://www.longacreracing.com/Userfi...BC_catalog.pdf. Grab it before someone else does!
Very informative, thank you.
Pat is offline   Reply With Quote
Old 06-04-2016, 02:37 AM   #49
zdr93523
Senior Member
 
zdr93523's Avatar
 
Join Date: Apr 2013
Drives: 2013 BRZ Limited
Location: Utah
Posts: 631
Thanks: 447
Thanked 343 Times in 166 Posts
Mentioned: 5 Post(s)
Tagged: 2 Thread(s)
Garage
Quote:
Originally Posted by e1_griego View Post
If you've got antoher cheap set I'm looking for take-offs

hahaha.
I actually have a full set of R1 S take offs available. They're 235/40R17 (I'll double check the size to be sure).
__________________
Instagram: @zdr_93523
Youtube: https://www.youtube.com/user/zdr93523
Pink Ribbon Racing 2013 BRZ Limited NASA ST2 and TT2 race car
www.makesmodels.com
www.camautomag.com
zdr93523 is offline   Reply With Quote
Old 04-30-2019, 06:14 PM   #50
rice_classic
Senior Member
 
rice_classic's Avatar
 
Join Date: Jun 2012
Drives: Nevermorange FRS
Location: Seattle, WA
Posts: 3,749
Thanks: 671
Thanked 3,457 Times in 1,541 Posts
Mentioned: 57 Post(s)
Tagged: 1 Thread(s)
Quote:
Originally Posted by Pat View Post
Thanks. I am learning this. I've never had a tire in this class before so it's all new to me. It certainly isn't my first choice given how I use the car, but I got a set from a friend for cheap so figured it was worth a shot.
Bringing this back from the dead to see if you experimented with these tires more. Any new info or did you give up on them?

I ran a season of road racing in my previous race car (ITA prepped CRX) with BFG R1S and Hoosier R7. That was a 225 on a 7" wheel and what I learned was that the R1S needed to be driven with more slip angle compared the R7 and at about 2-3 fewer PSI when hot. My R7 was fastest on that car at 38ish and the R1S like 34-36 (27ish cold).

As for their durability as a track or road race tire - the T4 national runoffs champion (Oscar) was on R1S's. I like them about as much as I liked the R7, it just took me some time to adjust the slightly greater slip angle necessary to reach their peak G.

Now that I have a heavy car (FRS) and I'm squeezing 245's onto a 7" wheel (because rules) I've need to relearn the tire and how to maximize that width on that rim. I have 3* of camber all around and ran the tires at 37-40 hot and wasn't happy. I think I may add another half degree up front (3.5*) and pull 3-5 psi out of them on my next go around and see how that goes.
__________________
SCCA T4 - FRS
rice_classic is offline   Reply With Quote
Old 04-30-2019, 07:08 PM   #51
Pat
Senior Member
 
Pat's Avatar
 
Join Date: Feb 2014
Drives: 2014 BRZ
Location: Denver, CO
Posts: 1,226
Thanks: 932
Thanked 717 Times in 412 Posts
Mentioned: 28 Post(s)
Tagged: 2 Thread(s)
Garage
Unfortunately I don't have any more experience with them.
__________________
Pat is offline   Reply With Quote
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Tire Degradation & Data GSpeed Tracking / Autocross / HPDE / Drifting 40 08-25-2015 10:55 AM
Stock In-Tank Fuel Filter Degradation sw20kosh Engine, Exhaust, Transmission 96 07-28-2014 03:36 AM
Brake line degradation so26 Issues | Warranty | Recalls / TSB 8 05-14-2013 08:47 PM
Interesting graphics on a 86 ESBjiujitsu Photos, Videos, Wallpapers, Gallery Forum 13 05-11-2012 11:16 PM
Why ft-86 is interesting? NewCarInQ42011 Scion FR-S / Toyota 86 GT86 General Forum 69 11-26-2010 05:05 PM


All times are GMT -4. The time now is 04:51 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Garage vBulletin Plugins by Drive Thru Online, Inc.