OK, we have our numbers for the Nats, and have accommodated everyone on the waiting list. So, at this time -- given the possibility unforseen events may cause a few entrants to cancel -- if you are now keen and wish to be added to a waiting list on a no-guarantees basis, send me an email to timbo_rx8@mac.com.

You snooze, you lose

 

Morning all,

I have offered my more flu ridden lucid moments to sort out any accommodation concerns or challenges for those attending the Nationals at Wakefield.

Highest priority is to hear from anyone who has paid their money AND submitted their forms to Timbo, but has not yet secured accomodation at Wakefield or the nearby town of Goulburn.

You can either respond by posting at https://www.rx8club.com.au/forum/viewtopic.php?t=475 or sending me a PM at either forum.

I have to go to bed now, but I will check the .au forum and my PMs at least three times a day.

 

just sent u a PM : ))

 

Timbo,

I have a question regarding the scrutineering. One of the checks is that the tires are in acceptable condition and the speed rating. Do you know what speed rating is required?

My tires are H rated (210km/h) not W rated (270km/h) like the stock Potenza's. Could this bite me on the **** on the day?

 

Have emailed you

 

With regard to my question above about tyre speed ratings, I did some more investigating, given that I was concerned for a while there that my tyres might actually be illegal. I'm glad to report that they are not.

This is an excerpt from the RTA guidelines for alternative wheels and tyres:

"If the speed rating of the tyres specified for your vehicle is higher than 140km/h, you may fit tyres with a lower speed rating but not lower than 140km/h."

It goes without saying that driving at speeds in excess of the speed rating is not recommended. Not a problem at Wakefield park.

Just FYI for everyone out there....

 

I'm going to fit truck tyres as I'll be lucky to break the 100kph barrier at Wakefield.............

 

Take out the baby seat Tim! :p :D

 

As long as none of us hit the barrier !!!

Cheers,
Hymee.

 

I would not think so Wildcard,

210kmh rated tyre has been tested on 210kmh in the long duration of period.

I think you should nurse the tyre at Wakefield and have a look at them now and then for wear but I don't think it will fail.

It is only up to 160kmh... not a lot of fun like Sandown when you are close to 200kmh

 

I've already flogged the **** out of my tyres on numerous spirited drives, so I am not concerned about them being up to the job. I was just concerned about the legalities of it all. Thanks for your concern though.

My basic understanding is that the speed rating is based on the maximum speed that abrupt lateral loads can be placed on the tyre. ie swerving rapidly to miss a kangaroo or hard cornering on a track. It's not so much about maximum speed in a straight line. Perhaps I will google and see if I can find come more info.

 

Update... (sorry about the hijack here, but I'm almost done now)

Couldn't find anything on google to verify my above statement, however I did learn that the speed rating and load rating are related.

The speed rating is the max speed the tyre should be under continuous load AT THE MAXIMUM LOAD RATING specificed for the tyre. For example, the stock Potenza's are 91W tyres, which means they are rated to 270km/h with a 615kg load on each tyre. My Nankangs are 93H, which means 210km/h with a 650kg load on each tyre.

So it stands to reason that if you decrease the weight being exerted on each tyre by fitting them to a car like the RX-8 instead of a 2 tonne V8, the maximum speed rating will be conservative. It's all about LOAD, not revolutions per minute.

 

Good information. I wonder how H rated tyres grip relative to W rated...or if there's any difference at all ? (apart from at the extreme )

 

I found this interesting quote at one of the web sites I visited:

"It is important to understand that speed rating is not an indication of road handling performance in any way. In fact, most methods of raising a tyre's speed rating can have the reverse effect. However tyres made for vehicles with high speed capabilities tend to also require high performance characteristics as well.

Producing tyres with high performance characteristics and speed ratings is expensive."

 

Well, that answers my question. But I think you should back off on the track...you know...just 'cos those tyres are...slower :D

 

********************************15 Days To Go!!!***************************

 

Happy, Happy, Joy, Joy......I also have the Nankangs H rated tyres. In fact I bought them after seeing the thread on it and I was worried also about the Nats. Bring it on....

 

Lets do 5 laps and check the tyre pressure and thread level.... it will be alright then.

I will love to hear from you Nankang guys how they perform on the track with those tyres too.

 

There shouldn't be any problem. Wildcard's post makes perfect sense in the perverse way that offends me 'cos I paid much more...again!

 

Timbo, you forgot to add 'again'. :p :p :D

 

fixed...oh, the edit comment doesn't appear

 

Which was? :D

 

Just acknowledging you for reminding me of my buyer's remorse

 

Hey, turn that frown upside down mate. Just think how much longer you've had the privileges of ownership.

Anyhow, it's only money. I've seen your list of previous cars remember. :p :D

 

I will raise my hand for this event too.

If I'm not in the "RX8 SP" then it will be in the "WAR-20B"

All assuming the wife gives me a day out to be a boy-with-his-toy or I convince here to bring the baby & she comes too.

Better check if the Cosmo can fit a baby seat in the back......