Nordic Vintage Challenge Rules

Ver. 18

Last updated 19. April 2017 by TK and SHY

Classes: 2WD, 4WD, Classic 2WD, Classic 4WD, Plastic Fantastic

Feedback
If you have any questions, feedback or input - please contact Tomas Karlsson or Svein Harald Ytternes. Please do not post this on RSB or Facebook. Thank you! We really do listen to suggestions and comments. We have tried to have open discussion on web before, and it never ended well.


2WD:
Models limited to production year 1994 and earlier.
No minimum weight.
Brushless motor limited to 17.5 turn.
Brushed motor limited to 19 turn.
ESC must be set to Forward/Brake only, no reverse.
Batteries limited to 2S LiPo or 6 cells NiMH. Also limited to 7.4 volts (only 3.7 volt LiPo cells are allowed).
Allowed front tires: Schumacher Cut Stagger LP, yellow compound, with no inserts (U6770). Or pre-glued on wheels with 12mm hex:
U6801.
Allowed rear tires: Schumacher Mini Pin, yellow compound (U6817 or old part no. U6608), Schumacher medium blue inserts (U6747). Or pre-glued on wheels with 12mm hex: U6792. These are now discontinoued as to production, but they've kept the part number for the new Mini Pin Version 1. Which are legal. Pre-glued on wheels with 12mm hex: U6818.
Other electronics like radio, speed control and steering servo are open.
Maximum total width is 250 mm.

Examples of cars: AE RC10 Worlds, Schumacher Topcat, Schumacher Cougar 2000, Fabiix 2000, Kyosho Turbo Ultima, Kyosho Ultima II, Traxxas TRX-1, Team Losi JrX2, Team Losi XX.

A special note as to the AE RC10 models: It must sport original arms or "genuine" vintage arms like RPM, Andy's etc. Or reproductions of these. Modern 3D printed arms from 3DRC or similar which are wider and give a longer wheelbase are not legal.


4WD:
Models limited to production year 1994 and earlier.
No minimum weight.
Brushless motor limited to 13.5 turn.
Brushed motor limited to 19 turn.
ESC must be set to Forward/Brake only, no reverse.
Batteries limited to 2S LiPo or 6 cells NiMH. Also limited to 7.4 volts (only 3.7 volt LiPo cells are allowed).
Allowed front tires Alt 1 (recommended): Schumacher Wide Stagger Rib, yellow compound (U6810), Schumacher medium blue inserts (U6746 or U6738). Or pre-glued on wheels with 12mm hex: U6812.
Allowed front tires Alt 2: Schumacher Mini Pin 4WD front, yellow compound (U6607), Schumacher medium blue inserts (U6746).
Allowed rear tires: Schumacher Mini Pin, yellow compound (U6817 or old part no. U6608), Schumacher medium blue inserts (U6747). Or pre-glued on wheels with 12mm hex: U6792. These are now discontinoued as to production, but they've kept the part number for the new Mini Pin Version 1. Which are legal. Pre-glued on wheels with 12mm hex: U6818.
Other electronics like radio, speed control and steering servo are open.
Maximum total width is 250 mm.

Examples of cars: Tamiya Top Force, Tamiya Manta Ray, Schumacher ProCAT, Schumacher CAT2000, Kyosho Optima MID, Kyosho Lazer ZX-R, Yokomo YZ10 870C, Yokomo Works'93, Tenth Technology Predator.


Classic 2WD:
Models limited to production year 1987 and earlier.
No minimum weight.
Brushed motor limited to 19 turn.
ESC must be set to Forward/Brake only, no reverse.
Batteries limited to 2S LiPo or 6 cells NiMH. Also limited to 7.4 volts (only 3.7 volt LiPo cells are allowed).
Tires: If the car is fitted with 2.2 wheels then it must follow the tire regulations for the 2WD class.
If using smaller wheels than 2.2 any spiked or grooved rubber tires can be used. Slick tires and foam tires are not allowed.
Other electronics like radio, speed control and steering servo are open.
Maximum total width is 250 mm.

Examples of cars: AE RC10 first version
, Kyosho Tomahawk, Kyosho Scorpion, Kyosho Ultima, Tamiya SRB, Tamiya Fox, Tamiya Striker, CRP Super Buggy, SG Coyote 2WD.

A special note as to the RC10 first version (or the re-release
"RC10 Classic"): It must sport the original short front A-arms (long front arms were introduced in 1989). It must also sport the 6-gear tranny. You are however allowed to use other shocks/springs if you like.

Exception 1: Tamiya Grasshopper II, Hornet and Super Hornet are allowed in the Classic class as they are all based on the Grasshopper chassis.
Exception 2: Tamiya Sonic Fighter is allowed.
Exception 3: All MRC, SG, Marui, Nichimo, Yankee, PB and Hirobo models are allowed no matter what year they were produced (but they must have 2WD only).
Exception 4: Team Losi JrX2 is not allowed in 2WD Classic.
Exception 5: Ultima 87, Turbo Ultima and Ultima Pro are allowed. Also a Joel Johnson Worlds'87 replica. The Ultima Pro XL (with longer arms) is not legal in Classic.

Classic 4WD:
Models limited to production year 1987 and earlier.
No minimum weight.
Brushed motor limited to 19 turn.
ESC must be set to Forward/Brake only, no reverse.
Batteries limited to 2S LiPo or 6 cells NiMH. Also limited to 7.4 volts (only 3.7 volt LiPo cells are allowed).
Tires: If the car is fitted with 2.2 wheels then it must follow the tire regulations for the 4WD class. U6609, Schumacher Mini Pin, yellow compound, slim is also allowed for front tires.
If using smaller wheels than 2.2 any spiked or grooved rubber tires can be used. Slick tires and foam tires are not allowed.
Other electronics like radio, speed control and steering servo are open.
Maximum total width is 250 mm.

Examples of cars: Kyosho Turbo Optima, Kyosho Progress 4WDS, Tamiya Hotshot, Yokomo YZ10 834B, Schumacher CAT XL and XLS, SG Coyote 4WD.

Exception 1: Tamiya Hotshot II, Supershot, BigWig, Boomerang, Thundershot, Firedragon, Super Sabre are allowed in the Classic class as they are all basically the same chassis as the original Hotshot (with 4 damper kit).
Excepton 2: Tamiya Avante (both versions) are allowed. Tamiya Egress and Vanquish are also allowed. A Jamie Booth replica Egress is not allowed.
Exception 3: All MRC, SG, Marui, Nichimo, Yankee, PB and Hirobo models are allowed no matter what year they were produced.
Exception 4: Kyosho Optima MID is not legal in Classic 4WD.
Exception 5: Yokomo YZ10 870C is not legal in Classic 4WD.

A note on motors:
Any motor with a higher turn can also be used (for example 20 turn, 21 turn and so on for Classic). Which means a Tamiya Sport Tuned, Mabushi 540, Mabushi 380 etc is also allowed.

About re-releases (all classes except Plastic Fantastic):
Re-releases / reissues of cars are legal, in all classes. Just be sure that the re-release doesn't have a modern chassis like the Sand Rover and Holiday Buggy. They come with a DT-02 chassis which is not allowed. The basic idea is to race cars that look and handle like they originally did. We have been very flexible as to release dates for Tamiya models, this is because they tend to use the basic platform for a very long time. There's seldom a competitive advantage to choosing a Tamiya model. And lastly they look very good on track and have a lot of personality.

2WD vs 4WD precisions:
You are of course welcome to race a 2WD Classic car in both the 2WD Classic and 2WD class. And vice versa a 4WD Classic in both 4WD Classic and 4WD.

In the 4WD classes all cars must have drive on all four wheels (meaning it's not allowed to run a 2WD in the 4WD class). You can however use an original 4WD car in the 2WD class if you remove drive on two of the wheels. 2WDs can have front or rear wheel drive.

Rules regarding modifications (all classes except Plastic Fantastic):
Modifications are fine provided that the custom parts keep the original shape. Approved modifications could be copies of an original chassis but in carbon fiber, upgraded gears, other belts, and also repro parts and bodies.

It is legal to swap parts with cars from the same time period. It is also legal to do small changes in geometry in order to make the cars more driveable. Just keep it within reason.

Option parts that were on the market back in the day are also allowed. For instance a mid motor conversion kit for 2WD or a MIP 4WD conversion kit for the RC10. Also prototype option parts that were in use on team cars. Reproductions or copies of such parts and kits are also allowed (for instance NIX91, which is a Worlds'91 replica). Option categories that were not invented back in the day are banned, such as big bore dampers. It may be a good idea to ask the organizer before you do a big modification or conversion as to if it's seen as legal or not.

It is not legal to extend the original wheelbase unless there was a mass produced and commercially available option chassis available in that time period.

Replacing a locked axle with a differential is permitted. It is also allowed to replace gear diffs with ball diffs.

Slipper clutches are allowed to add since many re-release kits come with this.

Plastic Fantastic DT-02:
ESC must be set to Forward/Brake only, no reverse.
The chassis must be of type DT-02
Allowed cars: Holiday Buggy, Sand Rover, Street Rover, Buggy Kumamon
Not allowed cars: Fighter Buggy SV, Super Fighter GR, Sand Viper, Super Fighter GR, Neo Falcon, Desert Gator, Super Fighter G, 1/10 DT-02 MS, Nissan Titan
Allowed hop ups: 540 silver can motor (53689). Free pinion size. Ball bearing kit 14pcs 5x11. Front oil dampers (50519). Rear oil dampers (50520). Original shock springs must be used.
Allowed tires Alt 1: Original re-release tires for the Holiday Buggy, Sand Rover or Street Rover.
Cutting down spikes are allowed (but not recommended as it gives less grip).
Allowed tires Alt 2:  Tires allowed in the 2WD class. Note that it does invoke 1 lap handicap vs tire alt 1.
Other modifications: This class is much about show and fun - so creative scale modifications "just for show" (that don't improve handling) are allowed. Paint, livery, lights and so on. Modifications that improve handling are not allowed (for instance adding a rear wing).

Race set-up 2WD, 2WD Classic, 4WD, 4WD Classic:
3 rounds of qualifying, 5 minutes each. Top 1 result counts.
3 rounds of finals, 5 minutes each. Top 2 results count.
Max 10 cars in each final. The final set up here may vary from race to race, it will depend on the number of partiticpants.
We normally have 2 timed practise heats before qualifying.


Race set-up Plastic Fantastic:
1 round of practise, 5 minutes. No qualifying.
6 rounds of finals, 5 minutes each. 
Top 5 results count.
The start of the finals is of Le Mans type (side by side). Those on tire alt 1 will start just before the start/finish line. Those on tire alt 2 will start just after the start/finish line. Thus providing those on tire alt 1 with almost 1 lap head start. There will be markings on the track for where both groups will start.

Time schedule:
FRIDAY:
-Free practice
-Exhibition/meeting/swap (self service, not arranged by organizer)

SATURDAY:
-Classes: 4WD Classic, 4WD, Plastic Fantastic, Plastic Fantastic Endurance
-Drivers briefing
-Group photo
-Concours d'Elegance / Best In Show / Best Plastic Fantastic prize giving
-One timed practice round
-Reseeding based on the three fastest consecutive laps in practise
-3x qualifiers
-3x finals
-Prize giving
-Common dinner at night

SUNDAY:
-Classes: 2WD Classic, 2WD
-Drivers briefing
-One timed practice round
-Reseeding based on the three fastest consecutive laps in practise
-3x qualifiers
-3x finals
-Prize giving

Transponders:
To be able to participate you need a personal transponder of the AMB/MyLaps brand. All the red ones are supported. You might share transponder with somebody as long as you don't run in the same heat, same class. You are all individually responsible for having a transponder mounted and ready before your heat starts.

We will try to have hand out transponders as well. But it's preferred that you own one. The hand out transponders have a footprint of 3,2 by 3,6 cm. And the height is 2,8 cm. They can also be mounted onto the body or wing by reaming a hole and fastening with a body clip. Note! The best ones are marked "A", the second best ones "B". They last fine for one race day. They blink green when fully charged. They blink red when they need to be charged. When they're empty there is no light at all and they will not count your laps.

Prizes:
Top qualifier (not PF)
Top 3 in all finals
Concours d'Elegance Winner (best paint job)
Best In Show (Best "theme" - matching paint job/livery, clothes etc)
Best Plastic Fantastic
Fantastic Driving (for all kids)

Entry fee:
200 SEK for each class.

License:
You need a national race license (SBF, NMF, AKK, DASU) in order to participate, this is due to insurance. First timers can get an educational license from SBF, but this can only be done once.

Where to buy tires?
Schumacher tires are sold online and in many stores.

Feedback
If you have any questions, feedback or input - please contact Tomas Karlsson or Svein Harald Ytternes. Please do not post this on RSB or Facebook. Thank you! We really do listen to suggestions and comments. We have tried to have open discussion on web before, and it never ended well.


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