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Old 02-11-2014
WildeBeestDesigns WildeBeestDesigns is offline
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Default "Yellow Jacket" conversion for GT12 Supastox

Hi all, from across the pond. We've just started to get a few GT12 cars together at our club and have been practicing and racing them. Very fun cars!

Well I was kind of thinking about making a conversion "kit" for the SS. New chassis, pod, and various bits. But using the stock rear axle and front suspension.

How do you guys think that would fit in the rules? So instead of me having to manufacture EVERY bit, it would be a conversion kit for the SS.

Here's a render of the "Yellow Jacket". I've had it on the track and it runs very good.
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Old 02-11-2014
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I take it that you've seen the new Superstox GT kit that came out this week?
http://www.racing-cars.com/pp/Car_Sh...paStox_GT.html
Also there is a roll damper conversion.

With the new car much improving the old car, I'd pick one up, than look to apply your work to that. Here in the UK, the chassis must follow BRCA rules for 1/12th GT racing, so anything you do must conform to those rules if you wanted to make up a conversion kit for sale.
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Old 02-11-2014
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Couple of UK groups on facebook if you want to join in WildeBeestDesigns

https://www.facebook.com/groups/336445139755237/

and

https://www.facebook.com/groups/362868537190629/
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Old 02-11-2014
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To be legal to run in BRCA affiliated race meetings a full rolling chassis kit has to be available, and that has to be available for sale for no more than £99.95. This means as a conversion that uses a different chassis it would not be legal for these events.

That doesn't mean it wouldn't be legal for other events or in other countries though.

A full copy of the BRCA rules is at http://www.brca.org/sections/subsect...ologation/1142
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Old 02-11-2014
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Use the existing chassis and don't drill and additional holes then it would be legal.

Otherwise you must make a full kit available for below the price limit.
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Old 02-11-2014
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Quote:
Originally Posted by sparkyboy22 View Post
Use the existing chassis and don't drill and additional holes then it would be legal.

Otherwise you must make a full kit available for below the price limit.
Not true as the bit would come into force re intention of the class, this came up last year, you can not bolt say a Mardave front end on a Schumacher rear, even if it uses the same mounting holes., another racer also made a plate to bolt on the old style associated front end to a supastox, and it was demed ilegal
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Old 02-11-2014
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Mix'n'match GT12 isn't BRCA legal and is against the intent of the rules.

It is unhelpful to post misinformation as factually correct when it's not!
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Old 03-11-2014
WildeBeestDesigns WildeBeestDesigns is offline
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OK, I get the "mix-n-match" not being legal. I did not understand that you can't bolt a Mardave front end to a Schumacher rear. I'm not sure why that would effect cost or fairness of competition, but I get it.

I can put out a full kit, if need be, to follow the rules, or intent of the rules.

What about things like servo saver or spur gear, etc.? A Kimborough servo saver is included in the SupaStox kit. Bolts, bearings?

How are "upgrades" handled? Is the "chassis" the only part that cannot be changed or upgraded?

Are all Mardave kits on this page legal for GT12 circuit?

http://www.mardave.co.uk/rc-car-kits/circuit.html

Some are as high as 149 pounds. Selling a circuit car with a straight (non-diff) axle and then expecting the customer to buy a diff to be competitive, seems to be worming around the intent of the 99 pound rule.

Could there be an additional rule, say 149 pound max for a circuit car with diff?

I would be happier if I could just put out a kit that included a diff rightout of the box for 149 pounds rather than have to supply a straight axle with a 99 pound kit that will just get tossed.

I will re-read the GT12 rules.

What about "homebuilder" stuff? What is the TIC "homebuilder" kit for? Is that for bangers only or something else? Can I buy the TIC "homebuilder" kit, build my own chassis around it and sell it as a kit and be legal?

I sense that this class is evolving, circuit is anyway. Rules that have been in place for oval or banger classes may not be ideal for circuit.

I saw the recent clarification on what a "solid axle" is, the intent that the physical axle is to be non-hollow. Can anyone speak to the idea that maybe it could be added that each wheel should spin on the same "virtual axle"? I too find the term solid axle can be confusing, a Nascar rear end would be legal in my book for GT12. In general, in RC, in the US, a "solid axle" means a "pan car" type rear axle. "split axle" may be the better term.

By definition 2 wheels that are connected by a differential cannot be attached to the same physical axle.

Please bear with me/us over here, we're new to this whole GT12 thing.

Thanks for the input.
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Old 03-11-2014
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Quote:
Originally Posted by mark christopher View Post
Not true as the bit would come into force re intention of the class, this came up last year, you can not bolt say a Mardave front end on a Schumacher rear, even if it uses the same mounting holes., another racer also made a plate to bolt on the old style associated front end to a supastox, and it was demed ilegal
I hadn't seen this. I stand corrected.
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Old 03-11-2014
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Yes the Mardaves are legal because they are a rolling chassis supplied for £99.95 plus about £80 of upgrades saving you nearly £40 for the full option car.

A 'legal' rolling kit has to be available to anybody for the maximum cost laid down in the rules, thus preventing special one-offs turning up at sanctioned meetings. Clubs can choose what they do but brca meets are specific.
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Old 03-11-2014
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The rules can only be changed by brca members proposing a new rule, going to the agm and voting for it. Anything can be changed, providing the votes for yes are more than the votes for no.
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Old 03-11-2014
WildeBeestDesigns WildeBeestDesigns is offline
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So I could produce a basic kit for 99 pounds that only has basic options, no diff, no dampers, etc. Then offer upgrade parts at any price?

As per 6.7 and 6.71:

1. Suggested retail price of 99 pounds. Does this mean it could be sold for more than the suggested retail price?

2. Definition of rolling chassis: Kit includes chassis, front axles with steering, rear axle, 4 wheels and tires. And it all mounts together, rolls and steers?

Not trying to skirt any rules, I just want to try to build and sell a car kit for GT12 that is within the rules.

Thanks for the input.
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Old 03-11-2014
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£99 car no extra's
http://www.mardave.co.uk/rc-car-kits...-kit-1933.html

£149 car with extras because the above car is £99
http://www.mardave.co.uk/rc-car-kits...-kit-1934.html
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Old 03-11-2014
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Quote:
Originally Posted by WildeBeestDesigns View Post
I just want to try to build and sell a car kit for GT12 that is within the rules.
That's fine if you want to sell ino the UK which has GT12 rules in place.

The global market is a different kettle of fish as there are no 'world wide' rules as far as I'm aware. But a country may have adopted the UK rules.
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Old 03-11-2014
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full car with diff, tools and lipo tape,oils, 4 wheels and tyres for £99.95 is what you need to beat ;-)

http://www.racing-cars.com/pp/Car_Sh...paStox_GT.html
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Old 03-11-2014
WildeBeestDesigns WildeBeestDesigns is offline
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Quote:
Originally Posted by mark christopher View Post
full car with diff, tools and lipo tape,oils, 4 wheels and tyres for £99.95 is what you need to beat ;-)

http://www.racing-cars.com/pp/Car_Sh...paStox_GT.html
I know, it's a TALL order! They sell it here in the US for $129 (or about 80 pounds).

We're trying to follow BRCA GT12 rules here as we build the class at our club. And I want to follow those rules so I don't limit my market.
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Old 03-11-2014
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Quote:
Originally Posted by WildeBeestDesigns View Post
I know, it's a TALL order! They sell it here in the US for $129 (or about 80 pounds).

We're trying to follow BRCA GT12 rules here as we build the class at our club. And I want to follow those rules so I don't limit my market.

ah even tougher then
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