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Control Tyres


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#1 gazza

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Posted 20 January 2013 - 08:12 AM

Hi guys

Letting everyone know that the control tyre will be posted from MJK tomorrow, and we should have them in our possession and ready to post out, mid to late next week

Remember that the tyres are posted out after confirmation of entry via payment, the earlier you pay the quicker you get the tyres.

Each entry gets 1 packet of 4 tyres only, these have been prepared with a different compound for both routed and plastic tracks, just for us, and are colour coded and are immediately recognisable from any of the other MJK tyres, so all you guys that have bought a set and set your cars up, it's time to rip them off.

Due to the expected extra grip, it is highly recommended that you glue your rims / wheels on, and also strengthen the hubs via brass collars or whatever your usual method is ..... some use cotton and super glue, i find that super glue turns the plastic brittle, but that's just my opinion.

It would also be advisable to glue the tyres to the rim

For those worried about not enough time for testing and setting up using the new tyres ..... as suggested before, just set your car up as you normally would ie add weight, get the balance right, pre glue the rims on, all setup using whatever tyres that came with the car, make note of lap times.

When the tyres arrive put a set on the rear, lightly true up (it won't take much) run the car and check lap times against earlier setup, when happy, take tyres off rear and put on front and take the unused set out and glue them on the rear, light true and it's ready to go

A note on tyre maintenance ......

The tyres only need to be run up on a damp rag with only water on it, you can use a little bit of liquid soap but that's all.

No chemicals are to be used on the tyres, WD40 and the like are out, if you use any chemicals you will loose all grip from the tyres, so track owners it may pay you to give the tracks a wipe down with a damp cloth before you run your event if your not %100 sure who's been running "treated" tyres on the track
Quickly read this post before it is deleted or i turn grey again

Gary

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#2 shadow_rusty

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Posted 20 January 2013 - 08:03 PM

Some great advise in there Gary...

Do you know if this compound is one that MJK are likely to release later??
Did you have a hand in the design of it?
Very interested to see how they compare on both plastic and routed...
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#3 Scuderia_Turini

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Posted 21 January 2013 - 06:25 AM

Gazza, what colour are the tyres? Hope its not a bright colour like the thingie people seem to like.

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#4 kalbfellp

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Posted 21 January 2013 - 07:31 AM

Can someone PM the payment info, PLEASE!

#5 Mobbzee

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Posted 21 January 2013 - 08:12 AM

you have a pm phil

#6 kalbfellp

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Posted 21 January 2013 - 08:31 AM

Tks mobbzee.

#7 Ben_M

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Posted 21 January 2013 - 09:03 AM

Any product recommendations for gluing the hubs to the axle? Im always a bit iffy about breaking the factory seal but it might be needed with the extra grip.
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#8 gazza

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Posted 21 January 2013 - 05:41 PM

The goddess of togetherness Araldite(y) is a good selection, the how to is after i remove the hubs i use a small file and either knurl the ends slightly or put a couple of small grooves at the ends to help in the adhesion of the glue, then after adding a bit of glue to the ends of the axle, gently push the hubs back on.

Note ..... make sure this is done after you check to see if the axle needs to be trimmed, because if you have to pull the hubs off after being glued, you will have a better than average chance of snapping them.

Also it's a good idea to true the hubs up, after the glue has set, and before you put the tyres on
Quickly read this post before it is deleted or i turn grey again

Gary

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#9 alexis in greece

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Posted 21 January 2013 - 06:09 PM

Ben you should first reinforce the wheel centers,they are subject to cracking
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Here is what i did for the Skoda
I cut a piece of 1mm brass sheet 4-5 mm bigger than the dia of wheel center,in this case wheel center is 6 so i cut 11x11.Drilled a hole 1,75 mm as centered as i could then mounted the piece on the dremel axle we usually mount the cutting disk on.
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I filed the square down to a disk of 10mm dia.
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Then drilled the disk.The tricky part is this:i used 5 bits 3mm,4mm,4.75,5.5,6 one after the other because it is very difficult to hold the tiny disc in place while drilling.In reality a 6mm bit gives a 5.6-5.7 mm hole which is perfect for the job.The general rule is that the final drill has to be ~.5 mm smaller than the desired dia.
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I filed conically the hole to reach the desired dia using a round file,one tiny step at a time,test fitting between steps.When done correctly(i scrapped 4-5 before getting it right) you can press fit the disk over the wheel center.Then
you dont even have to super glue the rim on the axle,i did because they had to last a whole championship.
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#10 Ember

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Posted 21 January 2013 - 06:17 PM

Or just use some brass or ally tube that fits over the hub.
Computers. They'll never catch on.

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#11 oldslot

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Posted 21 January 2013 - 07:42 PM

10 - 4 em's

#12 alexis in greece

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Posted 21 January 2013 - 07:50 PM

View PostEmber, on 21 January 2013 - 06:17 PM, said:

Or just use some brass or ally tube that fits over the hub.
I've used them in the past,its allmost impossible to find the right dia and very difficult to drill and file the exact dia, the advantage of this method is that you are able to push fit the discs ,i'm afraid superglue attacks polystyrene.
I 've used aluminum tubes to adapt grub screws to plastic rims though with good results
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#13 Ember

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Posted 21 January 2013 - 08:12 PM

That's why I used ally on mine last year. It has some stretch. I actually forgot to glue the wheels on the axles last year. But I don't think there were any problems. The ally stopped the stretch maybe?
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#14 Mobbzee

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Posted 21 January 2013 - 08:48 PM

i got the right diameter brass tube from Qld
http://www.hobbypart...ategories/tube/

#15 Knealer

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Posted 22 January 2013 - 04:10 AM

So Control tyre front and back then? Need to get some prep in this week.
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#16 miveson

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Posted 22 January 2013 - 07:24 PM

View PostMobbzee, on 21 January 2013 - 08:48 PM, said:

i got the right diameter brass tube from Qld
http://www.hobbypart...ategories/tube/

What size did you get Mobz? I'm ordering some brass/alu tubing shortly and I'll add the size you advise to my order.

#17 Mobbzee

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Posted 22 January 2013 - 07:54 PM

the car i have the diameter came in at 4.5mm.....they had a tube that was 4.55mm ID so i grabbed that

#18 miveson

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Posted 22 January 2013 - 07:59 PM

Cheers - I'm on the case......

#19 gazza

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Posted 24 January 2013 - 02:22 PM

Good news guy's, the control tyres have arrived and the posting out process has started to those that have payed
Quickly read this post before it is deleted or i turn grey again

Gary

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#20 Devious Dave

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Posted 24 January 2013 - 05:25 PM

Gazza, tomorrow night... myself and Oldslut will be able to pay....bring tyres. Dave





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