follow ft86club on our blog, twitter or facebook.
FT86CLUB
Ft86Club
Xero Limit
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 > Wheels | Tires | Spacers | Hub -- Sponsored by The Tire Rack

Wheels | Tires | Spacers | Hub -- Sponsored by The Tire Rack Specific topics relating to wheels and tires.


User Tag List

Reply
 
Thread Tools Search this Thread
Old 07-04-2012, 10:21 AM   #29
Matador
hashiryu
 
Join Date: Nov 2009
Drives: Mk4 Supra
Location: Probably mucking around in an engine bay
Posts: 2,567
Thanks: 18
Thanked 37 Times in 20 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
^^weights of said wheels (18")?
__________________
Welcome to FT86club.com
Quote:
Originally Posted by Dimman View Post
The 'FT' stands for 'forgot topic'.
Matador is offline   Reply With Quote
Old 07-05-2012, 03:43 AM   #30
Lasse
Senior Member
 
Join Date: Nov 2011
Drives: Avensis 2.2 diesel
Location: Finland
Posts: 182
Thanks: 54
Thanked 16 Times in 13 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by brianc View Post
It was a MazdaSpeed 3 wasn't it? 280lbs of tq go a long way.

There is actually a track review coming out of the new Genesis 2.0T R Spec vs the 2013 Scion FR-S. I was at the track when they filmed it. The Genesis consistently got faster lap times than the FR-S.
Hmmm, yeah. If you watch the video, you notice that Scion jumps from slowest to fastest just changing tires. This thing is "fast" with grippier tires. I don't know is it faster than genesis coupe, and i don't even care. But i know that tire cost of this vehicle are very reasonable! You can buy new set of tires with reasonable price and still be fast, you cant do that with r-spec GC
Lasse is offline   Reply With Quote
Old 07-05-2012, 10:26 AM   #31
brianc
OCD
 
brianc's Avatar
 
Join Date: Apr 2012
Drives: 2013 Scion FR-S
Location: Toronto, Canada
Posts: 293
Thanks: 0
Thanked 74 Times in 42 Posts
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Matador View Post
^^weights of said wheels (18")?
17x7.5 with star spec z1s vs 17x9.5 with star spec z1s. Same alignment front and rear. The wider tire got .5 of a second slower every lap in a 1 minute track. I was driving. The wider tire wouldn't allow the rear to turn over. The car was understeering. This was a fwd though.
__________________
OCD - obsessive car detailer!
brianc is offline   Reply With Quote
Old 07-05-2012, 11:46 AM   #32
rice_classic
Senior Member
 
rice_classic's Avatar
 
Join Date: Jun 2012
Drives: Nevermorange FRS
Location: Seattle, WA
Posts: 3,761
Thanks: 674
Thanked 3,471 Times in 1,547 Posts
Mentioned: 58 Post(s)
Tagged: 1 Thread(s)
Quote:
Originally Posted by brianc View Post

It's not surprising a wider tire would yield slower lap times. I've noticed this on the track myself for 200hp cars. There just isn't enough power to justify a wider tire. The tires need to give a little bit for proper steering.
There may have been other factors at play. More mechanical grip almost always improves lap times. If you're putting wider tires on your car (within reason), of the same brand/type and maintaining the same rolling diameter and getting slower lap times then something else needs to be addressed.
rice_classic is offline   Reply With Quote
Old 07-05-2012, 01:12 PM   #33
Matador
hashiryu
 
Join Date: Nov 2009
Drives: Mk4 Supra
Location: Probably mucking around in an engine bay
Posts: 2,567
Thanks: 18
Thanked 37 Times in 20 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by brianc View Post
17x7.5 with star spec z1s vs 17x9.5 with star spec z1s. Same alignment front and rear. The wider tire got .5 of a second slower every lap in a 1 minute track. I was driving. The wider tire wouldn't allow the rear to turn over. The car was understeering. This was a fwd though.
Sorry, was referring to the poster before you.
__________________
Welcome to FT86club.com
Quote:
Originally Posted by Dimman View Post
The 'FT' stands for 'forgot topic'.
Matador is offline   Reply With Quote
Old 07-05-2012, 02:27 PM   #34
sickmint79
Senior Member
 
Join Date: Feb 2012
Drives: bmw
Location: grayslake, il
Posts: 393
Thanks: 16
Thanked 142 Times in 84 Posts
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
i plan on enkei rpf1 17x7.5 with 225s. good footprint and stick and light weight. 18s are 2.4 lbs more apiece of rotational mass... plus extra weight for that 18" tire... is the 18 really going to be moar fastars? i'm speculating no.
sickmint79 is offline   Reply With Quote
Old 08-09-2012, 06:48 PM   #35
Bu-Tang
Senior Member
 
Join Date: May 2012
Drives: 2013 Scion FR-S, Nissan Pathfinder
Location: Calgary AB, Canada
Posts: 404
Thanks: 189
Thanked 212 Times in 96 Posts
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
this has been reposted twice now
Bu-Tang is offline   Reply With Quote
Old 08-09-2012, 06:51 PM   #36
empower-auto
Kouki-Monster
 
empower-auto's Avatar
 
Join Date: May 2012
Drives: 2013 Scion FR-S
Location: Saskatoon, SK
Posts: 1,137
Thanks: 11
Thanked 562 Times in 261 Posts
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
So, to get past 1.0G .. tires and ______
__________________
Rich Anderson
EMPOWER AUTO
empower-auto is offline   Reply With Quote
The Following User Says Thank You to empower-auto For This Useful Post:
hankster (08-09-2012)
Old 08-09-2012, 06:52 PM   #37
vtmike
Senior Member
 
vtmike's Avatar
 
Join Date: Jun 2012
Drives: Scion FR-S
Location: Virginia
Posts: 477
Thanks: 80
Thanked 130 Times in 101 Posts
Mentioned: 13 Post(s)
Tagged: 1 Thread(s)
It's not the width but the diameter that slows it down. The wider tires were 18's. Interestingly the wider 18's had more grip but slower lap times. Would have been interesting to see the results of lighter wider 17" wheels with the 235 tires.

Sent from my Galaxy Nexus using Tapatalk 2
vtmike is offline   Reply With Quote
Old 08-09-2012, 11:03 PM   #38
MmmHamSandwich
You know you want it.
 
MmmHamSandwich's Avatar
 
Join Date: Mar 2012
Drives: '13 FR-S
Location: RVA
Posts: 705
Thanks: 160
Thanked 327 Times in 154 Posts
Mentioned: 9 Post(s)
Tagged: 2 Thread(s)
Quote:
Originally Posted by Lasse View Post
But i know that tire cost of this vehicle are very reasonable!
This. 215/45/17 is a great size for selection and price. Upsizing to 18 alone typically adds 25% right off the bat.
MmmHamSandwich is offline   Reply With Quote
Old 08-09-2012, 11:48 PM   #39
Sasquachulator
Senior Member
 
Join Date: Dec 2011
Drives: 2016 Scion iM, 2017 BMW X1
Location: Calgary
Posts: 1,155
Thanks: 0
Thanked 359 Times in 226 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
i thought the point of the OEM tires was so it was easy to throw the back end out for a drift.

So the 18's they used were not ideally sized to match the stock size?

Ideally you'd want to match the stock rolling diameter as close as possible...cuz you'd end up with either an incorrect speedometer or you'd have to recalibrate the speedometer to match the new tire size.
Sasquachulator is offline   Reply With Quote
Old 08-10-2012, 12:04 AM   #40
#87
I usually post drunk
 
#87's Avatar
 
Join Date: Oct 2009
Drives: BRZ
Location: NY
Posts: 1,487
Thanks: 15
Thanked 489 Times in 231 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Sasquachulator View Post
i thought the point of the OEM tires was so it was easy to throw the back end out for a drift.

So the 18's they used were not ideally sized to match the stock size?

Ideally you'd want to match the stock rolling diameter as close as possible...cuz you'd end up with either an incorrect speedometer or you'd have to recalibrate the speedometer to match the new tire size.
Yes the diameter is off but the major con is not the speedo, who really cares about that anyway? It's the slight alteration to the gearing.
#87 is offline   Reply With Quote
Old 08-10-2012, 12:27 AM   #41
demby123
Senior Member
 
Join Date: Apr 2011
Drives: 86' Toyota Corolla GTSR5, 15' FRS
Location: dallas
Posts: 134
Thanks: 9
Thanked 16 Times in 7 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Now if only we could see the results with lightweight 16s and the same tire
demby123 is offline   Reply With Quote
Old 08-10-2012, 01:53 AM   #42
Allch Chcar
Postal Specialist
 
Allch Chcar's Avatar
 
Join Date: Sep 2010
Drives: Tesla
Location: State of Jefferson
Posts: 3,380
Thanks: 2,205
Thanked 645 Times in 419 Posts
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by rice_classic View Post
There may have been other factors at play. More mechanical grip almost always improves lap times. If you're putting wider tires on your car (within reason), of the same brand/type and maintaining the same rolling diameter and getting slower lap times then something else needs to be addressed.
You can see that it slowed acceleration going to the wider tires. They use G-meters to monitor acceleration and grip.

I've seen this same phenomenom in Forza (they use a good tire physics system) so I'm not surprised.

Plus it just makes sense, unsprung rolling mass is multiplied compared to sprung mass. Plus bigger tires have more rolling resistance. On modest HP, it makes a significant difference.
__________________
-Allch Chcar

Quote:
Originally Posted by Dragonitti View Post
Daily Driver, occasional weekend drifter.
Allch Chcar 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
Road & Track: 5 minutes to a faster FRS (/BRZ) via Tires xjohnx Wheels | Tires | Spacers | Hub -- Sponsored by The Tire Rack 22 11-18-2013 06:31 PM
Road and track vid DIG1992 Photos, Videos, Wallpapers, Gallery Forum 6 11-29-2011 10:00 PM
Road & Track: Scion FR-S Preview FutureFT86 Scion FR-S / Toyota 86 GT86 General Forum 3 08-29-2011 09:54 PM
GT5 - fastest Suzuka (full track) times NESW20 Other Vehicles & General Automotive Discussions 11 04-03-2011 12:20 AM
Road & Track says 2013 Champion Scion FR-S / Toyota 86 GT86 General Forum 6 09-08-2010 11:33 AM


All times are GMT -4. The time now is 12:07 AM.


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