Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster Racing Forum

Reply
 
LinkBack Thread Tools Display Modes
Old 08-14-2013, 04:53 AM   #1
Registered User
 
Join Date: Jun 2013
Location: canada
Posts: 289
hoosier r6 size for stock 17in wheels- help

Hi guys,

im looking to purchase hoosier r6 tires to put on my stock 17in wheels.

wheels size is 7x17 and 8.5x17

what would you recommend?

225/40/17 ------/225/45/17 in front?
255/45/17 in rear?

thanks for the help
Paseb is offline   Reply With Quote
Old 08-14-2013, 05:44 AM   #2
Track rat
 
Topless's Avatar
 
Join Date: Nov 2006
Location: Cucamonga CA
Posts: 3,644
Garage
986 or 987 model? It matters. And what type of event are you shoeing up for?
__________________
2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor

Last edited by Topless; 08-14-2013 at 06:42 AM.
Topless is offline   Reply With Quote
Old 08-14-2013, 06:58 AM   #3
Registered User
 
Join Date: Jun 2013
Location: canada
Posts: 289
its a 986 boxster S 2004.

build for DE and PCA race events

im building like a spec boxster, pretty much
Paseb is offline   Reply With Quote
Old 08-14-2013, 07:24 AM   #4
Track rat
 
Topless's Avatar
 
Join Date: Nov 2006
Location: Cucamonga CA
Posts: 3,644
Garage
Quote:
Originally Posted by Paseb View Post
its a 986 boxster S 2004.

build for DE and PCA race events

im building like a spec boxster, pretty much

225/45/17, 255/40/17 would be standard sizes for that car.

R6 needs about 3 degrees negative camber to get the most out of them and avoid shredding the outer shoulders. Expect to get about 2 days/8 heat cycles useful life from them before they go off and turn into hockey pucks. Then it's time to buy a new set $$$.
__________________
2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor
Topless is offline   Reply With Quote
Old 08-14-2013, 07:31 AM   #5
Registered User
 
Join Date: Jun 2013
Location: canada
Posts: 289
damn, that's not lot of life loll

thanks, i will order them
Paseb is offline   Reply With Quote
Old 08-14-2013, 07:59 AM   #6
Track rat
 
Topless's Avatar
 
Join Date: Nov 2006
Location: Cucamonga CA
Posts: 3,644
Garage
They are quite wonderful for a very short time. I personally would not run "the good stuff" in a DE where lap times are irrelevant. I save quality rubber for Time Trial competition because it doesn't make sense to spend $1400 on fresh rubber unless you are chasing a $10 trophy.

FYI:

R6 are good for 2 days (annual tire costs $14K)
R1 & V710 are good for 3-4 days
Z214 are good for 4-6 days (annual tire costs $5K)
RA-1s are good for 8-10 days
NT-01s are good for 8-10 days (annual tire costs $1500)

I have dabbled in the others but prefer to run mostly NT-01s.
__________________
2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor

Last edited by Topless; 08-14-2013 at 08:29 AM.
Topless is offline   Reply With Quote
Old 08-14-2013, 11:08 AM   #7
SPB racer
 
Join Date: Feb 2011
Location: San Antonio TX
Posts: 252
Garage
Since it sounds like you want to end up in SPB club racing why not run RA1s (the only tires allowed in the class)?. It will allow you to accustimize yourself as well as learn the setup for your car.

You'll get at least 2 or 3 times the cycles out of them if compared to Hoosiers. If I were DEing on them I would run them till they fall apart - probably 4 or 5 weekends. Racing I get a total of 6 days including 8 races out of a set.

Most of us run a square set up which means 8.5s with 255/40/17s on all corners (with 1/4" spacers on the front for most). Fast laps and wins seem to mostly occur on this setup so hard to argue with success.

SORRY PLEASE IGNORE EVERYTHING ABOVE I JUST REALIZED YOU ARE RUNNING A CAR INELIGABLE FOR SPEC RACING.

Last edited by Jittsl; 08-14-2013 at 11:10 AM.
Jittsl is offline   Reply With Quote
Old 08-14-2013, 07:05 PM   #8
Registered User
 
Join Date: Oct 2009
Location: atlanta
Posts: 57
Hoosier's last a lot longer if you heat cycle them first. Run them for a short session and then let them sit for a day. Not easy to do unless you have 2 sets for tires.
__________________
Blake Meredith

Flat 6 Innovations Engine Shop Foreman
bam914 is offline   Reply With Quote
Old 09-09-2013, 04:22 AM   #9
Registered User
 
Join Date: Nov 2009
Location: Virginia
Posts: 3
I have done a bunch of testing with Hoosiers on my SPB (when not racing in class) and grabbed a lap record for TTD at Summit Point doing it. and recorded times well under the standing lap record in TTD/PTD at Watkins Glen (High 2:10 low 2:11 range on used up R6s).

I would not use the R6 255/45/17 at all on a SPB. The gearing is horrible.

The R6 245/40 is what fits best on the 8.5 I have run that on all 4 corners with great results. The car has the same exact balance as with the RA1 255 all around but with higher grip levels and braking. If you are setup to run the RA1 in SPB trim this config is the easiest to switch back and forth to.

The 225/40 R6 is wider than you think but also has a significantly smaller diameter and is lighter to boot. You may find that it works extremely well when used on all four corners giving you a significant gearing advantage.

I would try the 225/40 R6 on all four corners with the 17x7 or with the 17x8.5. I preferred it stretched on the 8.5 as it is extremely crisp on turn in. Your car will sit over 10mm lower on the 225 mounted on the 17x7, even more if stretched on the 8.5.

Best of luck.

-Paul
paul996 is offline   Reply With Quote
Old 09-19-2013, 09:39 AM   #10
SBD
Registered User
 
Join Date: Dec 2005
Location: CAlifornia
Posts: 70
A bit late to the the party but what Paul says is right on! I have done similar testing with 245r6 and 225/40/17 r6 ( except mine is a base 987) and with your wheel size I would also recommend the 225/40. I get at average of 2.5-3 2 day events with the r6s running at a heavy 3050lbs with driver+hard driving. I usually run street tires for first session as warm up.

Another option is the hankook z214 (best price, good life and excellent grip-underrated tire) and bfg r1. Been seeing good results with the bfg in PTD and their 245 dia is a bit smaller than the 245r6. Tire Life is longer too. I have not run either as no contingency offered. For track and fastest performance I would probably run the bfg r1 or r1s, For most cost effective with close performance I would run the hankooks..
Lastly, with an S, Running a 275/35/17 on 9 square would drop considerable time.

Last edited by SBD; 09-19-2013 at 10:01 AM.
SBD is offline   Reply With Quote
Reply


Thread Tools
Display Modes

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 05:07 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page