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xratedkarting
Joined: 02 Mar 2010 Posts: 74 Location: Worcester
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Posted: Thu Dec 15, 2011 8:46 pm Post subject: Aixro Club180 race series Tyres |
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For some time during 2011 I have been asked if we may be able to use a softer tyre over the Dunlop DCH ones allowing the Aixro to even better lap times, I have resisted due to wear rates and therefore costs.
However a NEW karting idea to echo that like Formula 1 has been put forward. If each driver was allowed to have 2 sets of new dry tyres for race day, ( one being the DCH and the other the much softer DDS) and both set would be marked and each driver MUST use both compounds during the racing day and must also use the same 2 sets of tyres for the next event, would this make the race series even more exciting and keep the costs the same? Please can i hear back if anyone has any other ideas that could be added to this rule.  |
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kai

Joined: 27 Sep 2006 Posts: 1273 Location: Southeast England
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Posted: Thu Dec 15, 2011 9:21 pm Post subject: |
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Shall we just call them 'options' and 'primes', then?
Seriously, though, I think it’s a great idea.
Apart from bringing the divergent preferences on tyre compound choices among the drivers together into the best possible way – in the spirit of the driver-led democracy that we enjoy – I agree this promises extra spice.
In the case of an all-wet race meeting the same two sets of dry tyres would obviously just be kept until the next meeting. What if, however, a race day is mixed dry/wet?
Anyway, would this be a world-first in karting, I wonder?
I gather our grids are looking very promising, too, so can't wait!
Meanwhile, let's work out the best way to run this. Let's please also hear from people racing or involved in other series. |
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alexp

Joined: 01 Mar 2008 Posts: 198 Location: london
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Posted: Thu Dec 15, 2011 9:30 pm Post subject: |
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I like the idea. I found the wear rate on the DDS to be similar to DCH. Are we allowed to use kers also?  |
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gd2go
Joined: 03 Feb 2011 Posts: 9 Location: Colchester
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Posted: Thu Dec 15, 2011 9:51 pm Post subject: tyres |
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Anything that makes the race day more interesting & has the backing of the majority of drivers sounds good. One downside is drivers considering "trying / testing" the series may be deterred by the need to buy 2 sets of tyres.
Certainly an idea worthy of serious consideration |
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John Savage
Joined: 27 Sep 2006 Posts: 897 Location: UK
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Posted: Fri Dec 16, 2011 12:35 am Post subject: |
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Kart racing is as a great man once said "the purest form of driving" tyre changes will distract from this especially if races are won and lost in the pits.
The fact that each driver would also need a pit crew will add considerably to the costs
If its not the case that changes are to be made during a race then why go for all the extra administration and the possibility of creating considerable discord amongst the drivers
The best idea would be to use a rock hard compound and have one set of tyres for the season, then we would see who is the best driver
If any of you are not finding driving an Aixro "interesting" then may I respectfully suggest that you are not pressing your right foot down hard enough  _________________
Dellorto, Mikuni and Keihin Jetting & Kart Setup Software
www.rotaxjetting.com |
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xratedkarting
Joined: 02 Mar 2010 Posts: 74 Location: Worcester
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Posted: Fri Dec 16, 2011 7:11 am Post subject: |
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I think that the suggestion is not to split races with "pit stops" but to use both compounds throughout the racing day, ie with 3 heats and a final drivers could opt to use the DCH twice and the DDS twice, timed practice and other practice on the day of the races would need to be sorted??
Keep coming up with ideas chaps as this is NEW to all of us, Like the prime and Option idea |
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kai

Joined: 27 Sep 2006 Posts: 1273 Location: Southeast England
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Posted: Fri Dec 16, 2011 9:11 am Post subject: |
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OK,
I think ‘gd2go’ makes a good point about people ‘giving it a try’. However, that may only concern the occasional hire/driver as I presume any owner/driver keen on racing will do so more than once a season. Besides, a one-race-only owner would still have practice use of both sets of tyres. Hire/drivers might only be charged for one set anyway as that is effectively what they would use in one race.
The difficulty would be coordinating with the cycle of brand-new vs. part-worn tyres used in a given meeting.
| John Savage wrote: |
If any of you are not finding driving an Aixro "interesting" then may I respectfully suggest that you are not pressing your right foot down hard enough  |
Ouch; must mean me at the back of the grid!
However, for the record, I am among those who have consistently voted for keeping the hard tyres. I’m not the least bit interested in how our lap times compare with other classes, only in how far I’m behind our own front-runners.
On the other hand, a) I would favour a compromise if a good one like this (maybe) can be found and b), having both raced the Vega Blue in Holland and tested DDS here, I must acknowledge they are ‘very nice to drive’, especially the DDS. I seriously doubt the equal longevity, though, Alex!
Extra administration, confusion and therefore discord among drivers certainly would be a serious potential problem.
Incidentally, I tried Dunlop Hard and Soft (DDH & DDS) back-to-back this past autumn and found nearly 2 secs difference.
As for ‘karting purity’, John: well, if everyone had wanted that to prevail we would all still be driving DD, air-cooled, no front brakes, no nothing. I guess we’re more at the give-us-all-the-gizmos end of the market. So rock on KERS etc…
Alternatively, we could just go to DDM, or DEM, as they will presumably be called next year: nothing like being a fence-sitter, is there? |
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lupetto
Joined: 17 Feb 2009 Posts: 21 Location: Krefeld, Germany
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Posted: Fri Dec 16, 2011 2:22 pm Post subject: |
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Hi guys,
I could ask a lot of questions on how this should be implemented, but I'll rather bring up my opinion as part of the discussion.
I think it’s an interesting idea especially when a race can otherwise be boring. That’s why they change tyres in 2-hour F1 races. And with unlimited resources it could be fun to have different tyres between heats on a karting race weekend as well.
But there is enough tactics in the tyres anyway, especially if they are soft enough. With the setup, air pressure, etc. the driver can decide if he wants full grip instantly, or if he wants to pick up speed towards the end of the race. Also he needs to think about his driving during a race, so he has some grip left when he needs it.
Therefore I'd rather go for a medium tyre and put that right foot down  |
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lupetto
Joined: 17 Feb 2009 Posts: 21 Location: Krefeld, Germany
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Posted: Fri Dec 16, 2011 2:33 pm Post subject: |
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| Quote: | As for ‘karting purity’, John: well, if everyone had wanted that to prevail we would all still be driving DD, air-cooled, no front brakes, no nothing. I guess we’re more at the give-us-all-the-gizmos end of the market. So rock on KERS etc…
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BTW, I don't fully agree here. If I were to pick a second kart besides my SH/aixro, I’d go for a 100cc (or 135cc) air cooled, rotary valve, direct drive, no batteries and wires, no bumpers, no nothing - but 'pure' fun  |
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kai

Joined: 27 Sep 2006 Posts: 1273 Location: Southeast England
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Posted: Sat Dec 17, 2011 1:35 pm Post subject: |
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Pah, I’m still waiting for a nice diesel kart engine to come along, with a big turbocharger of course.
Any more suggestions on tyre rules?
Doesn’t KZ run DDM/DEM now? What is their experience with those, I wonder? |
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Latestarter
Joined: 29 Dec 2006 Posts: 44 Location: Herefordshire
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Posted: Sat Dec 17, 2011 6:02 pm Post subject: |
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What sort of lap time difference would you expect between the different tyres?
Tim |
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Latestarter
Joined: 29 Dec 2006 Posts: 44 Location: Herefordshire
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Posted: Sat Dec 17, 2011 8:02 pm Post subject: |
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Sorry,just noticed Kai's 2 secs difference in an earlier post and I agree that anything that may cause confusion in the ranks is best avoided as the good spirit in the paddock is a huge plus. As a compromise, put Jurgen and Bjorn on hard tyres and let every one else run soft.
Tim |
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Antoine

Joined: 07 Jun 2009 Posts: 268 Location: Eastleigh
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Posted: Sun Dec 18, 2011 12:18 am Post subject: |
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A. We could have 4 sets of soft and 4 sets of hard for the season, to be used as we want
Or
B. Same as above but for a race meeting: 2 heats on hard, 1 heat on soft - driver to choose which heat he want to use the soft. Final on soft.
For each meeting we use a new set anyway so introducing the soft tyres with a limitation of 1 new tyres per meeting would not increase the cost.
I am personnaly interesting by soft tyres, not necessarily because of laptimes but because of the driving experience. |
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alexp

Joined: 01 Mar 2008 Posts: 198 Location: london
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Posted: Sun Dec 18, 2011 10:34 am Post subject: |
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| kai wrote: | I seriously doubt the equal longevity, though, Alex!
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Ok, I'm mistaken, they were D*M I tried, not D*S
I would like to try the softer/more grip compound, but does that mean we'd need to adjust other elements of the set-up to get the full benefit from tyre to tyre? |
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Antoine

Joined: 07 Jun 2009 Posts: 268 Location: Eastleigh
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Posted: Sun Dec 18, 2011 11:44 am Post subject: |
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Indeed you need to change the set up - I think you want harder chassis with soft tyres and vise versa. However it is hard to give general rules of karting set up as they are so much variables (driver style, chassis make, etc...).
I think the most important thing with soft tyres is: get the pressure right or you are going to destroy them in no time. (9psi cold is good starting point). |
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