Alfa Romeo Owners Club of Australia Forum

Racing => Historic Group S Racing => Topic started by: Scott Farquharson on October 20, 2006, 10:08:36 AM

Title: Historic Group S - Approved Tyres for Group S
Post by: Scott Farquharson on October 20, 2006, 10:08:36 AM
An updated approved Production Tyre list applicable to both Group N and Group S has been published - most competitors are using the A032 Yokohama which has now been superceded by the A048.  I am also investigating some alternatives and will keep you posted.

http://www.cams.com.au/bulletins/B06-014%20Historic%20Group%20N%20-%20Approved%20Tyre%20List.pdf (http://www.cams.com.au/bulletins/B06-014%20Historic%20Group%20N%20-%20Approved%20Tyre%20List.pdf)

Tyres must be from the production car list which I have just posted in the group s news section and must be 60% profile.  Most Alfa competitors are running the Yoky A032 which has just been superceded by the A048 which has been just added to the production car list.  The AO48 is the control tyre for a number of classes (eg Aus Prodn Car Champ) and is short supply ATM but should free up by the time we are ready.  The size is 195 60 14.  The supplier has said that based on testing the A048 is faster than the AO32.  You can use other tyres if you want as long as they are from the list.  A048's are about $230 each.
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: Scott Farquharson on March 16, 2007, 01:28:09 PM
Updated Tyre list:

Note the Bridgstone RE 55 and the Dunlop D01 have now been added .  Some reports have the RE55 as being comperable to the Yoky A048.

Bridgestones available from Trackside Tyres (Craig) 03 9761 5557
Dunlops from Stuckeys (Russell or Michael) 03 9386-5331

http://www.camsmanual.com.au/pdf/0810_0701.pdf

Title: Re: Historic Group S - Approved Tyres for Group S
Post by: Fast Eddie on March 16, 2007, 04:41:58 PM
Great news... love my D01's
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: Scott Farquharson on August 16, 2007, 03:42:34 PM


 
      Re: Washing your car
ę Reply #14 on: Today at 03:39:49 PM Ľ     

--------------------------------------------------------------------------------
Quote from: Gary Pearce on Today at 11:07:54 AM
Now you guys are just skirting around the problem. You know I like clean a Alfa.
2500 litre rainwater tank from Bunnings $360.00, pump tank stand and fittings to down pipe $330.00, wash your cars when ever you like Priceless!!
On a more important matter for you racers. As you know I am building a 105 2000 Group S car and as I have my tax return I thought I would buy some shiny new wheels. I have screwed down a good deal on Performance Superlites 14 x 6", 4/108 stud patern and 26 P off-set. Is this off-set correct for our cars? or don't I have a choice. On the issue of tyres, I have downloaded the CAMS list and there is toooooo many to choose from. What is your recommendation for tyres?

Hi Gary,

I have the superlites on the Alfetta but not sure of the offset for the 105. 

It is true you can use 15's on the 105 however bigger OD means slightly taller gearing if you are running a 4.3 diff or taller stay with the 14's.  As for tyres you should probably stay with either the Bridgestone RE55 (Trackside Tyres - Craig 9761 5557) Yokohama AO48 (Traction Tyres 9764 2811) or Dunlop D01 (Stuckeys 9386-5331) in a 195 14 60.  I have used the Bridgestones and the Yokies and both were excellent.  I have used the D01's on other cars but not in this size and they are pretty good too.  Price will be the factor.  Bridgies and Yokies are about $950 to $1050 a set.
 
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: nerineandgary on August 23, 2007, 01:14:03 PM
Thanks Scott.
F.Y.I. I have purchased the Performance Superlites 14x6 with their maximum offset P12, which is 14mm outboard from normal. On my 105 2000 they appear to fit nicely inside the guards.
Michael from Stuckeys was very helpful, but my tyre of choice the Dunlop DO1J's are no longer available in 195/60-14.
Apparently the new Dunlop replacement is a directional tyre DZ03 which at present has not been approved for our use?
I still have a lot of work to do before wheels are turning, so I may hold off on tyres a little longer. What is your feeling on directional tyres?
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: Scott Farquharson on August 23, 2007, 01:19:00 PM
Yes, wait until the car is ready and see if the DZ03 are out.  As for directional tyres, as it is for all tyres, it is a matter of trial and error.  Give them a run and lets see how they go.  It is likely that they will be faster than the D01 they replace, so not much to lose.
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: alfagtv58 on August 23, 2007, 01:36:25 PM
There was a new Tyre List due for release by CAMS on 1 July 2007, but it has been delayed.  The old list is still current for the time being.  Watch this space.....
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: alfagtv58 on August 23, 2007, 01:53:55 PM
Having said the above it seems CAMS has just released a bulliten on Group N & S Tyre List!!  See below link.

http://www.cams.com.au/bulletins/B07-090%205th%20Category%20-%20Group%20N%20and%20S%20Tyres.pdf

Title: Re: Historic Group S - Approved Tyres for Group S
Post by: nerineandgary on August 23, 2007, 02:18:47 PM
You are a wiz Phil.
How you keep abreast of all these CAMS regs is beyond me. So.......I take it the all previous tyre lists are now superseded by this new tyre list?
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: Fast Eddie on August 24, 2007, 12:50:24 PM
Gary,
i had the new Dunlop DZ03's fitted to the red Alfetta and although i didnt get much time on them, i was impressed as i was a D01J fan before then.

Now they are listed, all you need is lotsa cash in order to test em all out for us

Good luck
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: nerineandgary on August 24, 2007, 05:22:59 PM
Thanks Ed, it could be a while before a) I get the car finished and b) before I am good enough to test my skills let alone the tyres. Maybe I will need you to fly over and do my testing?
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: Fast Eddie on August 24, 2007, 05:51:43 PM
Yeah, i'm sure i can mae myself available for you Gary ;D
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: Craig Sinclair on November 29, 2007, 06:01:50 PM
Does anyone know whether the Dunlop D93J is still allowed to be used in GroupS? (Scott, Phil?) I noticed that they were on the approved list, but now are not. Would that make them ineligible?  In any case, If anyone has used them before, how do they rate? Thanks!
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: Scott Farquharson on November 29, 2007, 11:34:48 PM
They are probably not on there because they have been discontinued so Stuckey would not have submitted them again.  I don't think you will have any problem running them if you still have a set or 2.
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: Paul Newby on November 30, 2007, 11:01:04 AM
I believe the Dunlop D93J is the famed Dunlop "wets." As such there are no longer allowed in Group S as they are too much of an advantage in wet conditions and in the interests of containing costs (i.e competitors requiring drys and wets) they have been banned.

I'm not sure whether competitors who still have them will be allowed to "use them up."
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: Scott Farquharson on November 30, 2007, 01:23:04 PM
Sorry, I just glanced and thought you said D98 not D93.  D98's would be ok but Paul is right, the D93 was the "wet" formula r tire and not allowed.  The D98 was the old squiggly line tire superceded by the D01.
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: Scott Farquharson on February 06, 2008, 11:51:17 AM
Updated Tyre List for 2008

http://www.camsmanual.com.au/pdf/historics/0810_Approved_Tyre_List_Q108.pdf
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: Gary Pearce on February 08, 2008, 01:12:45 PM
Thanks for the alert Scott. As I am ready to buy now do you think the new Dunlop D84J would be the most suitable 195/60-14 for my 105 Group S contender? I don't see the famed D98's or D93's or DZ03's on the list now. Before answering bear in mind my criteria, able to out brake and our handle Scott F, Colin B and Phil B.
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: alfagtv58 on February 08, 2008, 01:50:19 PM
Before answering bear in mind my criteria, able to out brake and our handle Scott F, Colin B and Phil B.

Maybe its a set of cross-ply tyres that you are after Gary....that should help the cause.
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: Scott Farquharson on February 08, 2008, 03:02:55 PM
Not sure the D84J would be the quickest.  The DZ03's are on the list and they would be the pick of the Dunlops.  Wouldn't be much between the Dunlop's, Bridgestones and Yokies.  Is this the start of a tyre war?
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: Simon Bidese on February 08, 2008, 03:08:27 PM
just to add my 2 cents in guys...we have heard recent reports about the Yokie's....aparantly towards the second hald of the tyre life/tread depth the yokies have recently lost a lot of grip...something to do with the recent batches of rubber quality, etc.  We recently switched and are running Brigestone for the first time and are very happy.  Just something to be weary about with current yokie's.

Cheers

Simon
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: Gary Pearce on February 08, 2008, 04:32:23 PM
No tyre war, just speed war.
Spoke to Russell Stuckey who was helpful as usual and has steered me away from Dunlop 84J's saying they are the new 'wet' tyre. (I thought wets were to be outlawed in Group S?) So I think I will go with the DZ03G which I believe is the new replacement for D01J.
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: Colin Byrne on February 08, 2008, 04:56:58 PM
just to confuse things a little more, Iíve just gone through my first set of bridgestones and thought they where a pretty good tyre.  The wear rate vs grip level was really good, Iíve got 16x7 wheels so there is a little more rubber there than the group s guys but they lasted me targa, the six hour and 5 club sprints and kept a consistent grip level al the way down.  I've only driven on yokie's to compare it to so i can't comment on dunlops
(nice tire choice criteria to gary  ;D)
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: alfagtv58 on September 05, 2008, 02:59:24 PM
Updated List

http://www.camsmanual.com.au/pdf/historics/0810_Approved_Tyre_List_Q308_1.pdf
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: alfagtv58 on August 02, 2011, 12:14:09 PM
Updated List

http://www.cams.com.au/en/Sport/~/media/Files/Sport/Bulletins/2011/B11-076%205th%20Catergory%20-%20Group%20S%20Approved%20Tyres.ashx (http://www.cams.com.au/en/Sport/~/media/Files/Sport/Bulletins/2011/B11-076%205th%20Catergory%20-%20Group%20S%20Approved%20Tyres.ashx)

This is quite a shift away from the previous system, approved tyres (without sizes) and a list of acceptable wheel dimensions for specific cars.  There may be an impact on 105 cars, from memory they could run 15" wheels, seems that 14" only is allowed now???

Stay tuned for more info on windows in open cars (your Spider Nick!) and electronic ignition (yay!)
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: alfagtv58 on August 17, 2011, 10:10:13 AM
email just recieved from Group S Racing Assoc President and all around nice bloke!

Quote
Members may be aware that CAMS Tech Bulletin B11/076 of 29 July 2011 (Group N & S Approved Tyres) had several inadvertent omissions relating to the listing of approved tyres.
 
This bulletin has now been re-issued as CAMS Tech Bulletin B11/079 of 3 August 2011 (Group N & S Approved Tyres) with the correct listing of approved tyres. The bulletin can be downloaded from the CAMS website.
 
http://www.cams.com.au/Sport/~/media/Files/Sport/Bulletins/2011/B11-079%205th%20Catergory%20-%20Group%20N%20and%20S%20Approved%20Tyres.ashx
 
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: hmd on February 29, 2012, 01:04:06 PM
Yokohama A050 added to list.

http://www.cams.com.au/Sport/~/media/Files/Sport/Bulletins/2012/B12017%205th%20Category%20%20363%20Approved%20Tyre%20List%20N%20%20S.ashx (http://www.cams.com.au/Sport/~/media/Files/Sport/Bulletins/2012/B12017%205th%20Category%20%20363%20Approved%20Tyre%20List%20N%20%20S.ashx)
Title: Re: Historic Group S - Approved Tyres for Group S
Post by: Neil Choi on September 13, 2013, 07:25:13 PM
Updated tyre regulations.

http://docs.cams.com.au/Regulations/Bulletins/B13-085%205th%20Category%20-%203.6.3%20Approved%20Tyre%20List%20N%20and%20S.pdf (http://docs.cams.com.au/Regulations/Bulletins/B13-085%205th%20Category%20-%203.6.3%20Approved%20Tyre%20List%20N%20and%20S.pdf)