I have left this article in place as I think it is worth considering if you would like to create challenging racing on a Carrera Plastic Surface.
Our set up for the Ferrodor surface is different and we run no magnets in the Sports/ Gt Class as the surface has more traction.
Car set up for the Ferrodor is currently being developed & will do another article when experiments & information are complete.
I have worked quite a bit on this car set up system to emulate painted wood MDF routed performance & handling on a commercially made plastic tracks. I think I have tried most magnet & added weight combinations over the last 6 months.
The result is as I hoped for making all the classes of cars more realistic a a bit more challenging to drive.
Even though we have painted the track with Dulux Ferodor We are still using the Car Set Up detailed below until 2011
The common findings are that in most classes & cars not much added weight was used. If it was it was placed in front of the rear axle.
All classes have a maximum total downforce of 230 grams. Most classes have the magnet placed at the front 1/3rd of the wheel base.
One exceptions is the Scalextric F1the front magnet position is fitted with a maximum of 200 gram down forc. This limit is because the magnet position is between the 1/3 wheelbase and the center of the car. More down force here makes the car too much like having the magnet in the rear magnet holder.
With the Scalextric F1 button magnets can added to the 8mm button magnet position in the front of the car . The total of both bar & button magnets is not to exceed 230 grams
All down force magnets are removed from the rear of the car.
Even though I have painted the track with Ferodor the set ups described here are what is specified for racing on the new Dulux Ferodor surface. We will experiment with no Down force on the Ferodor in the near future.
Fulham Park Raceway - 31/7/2010
Hi, I have just set up the 3 FPR track Camero's for Group W racing. I decided to record what I did . This will be uploaded to the web site for reference for any one to use who wants to set up Camero or other
Group W cars.
The first thing is to measure the 1/3 distance between the front & rear axles. I usually mark the chassis for future reference.
On the Camero the 1/3 distance falls exactly on the front edge of the magnet retainer. So unfortunately the centre of the magnet would be too far to the rear if fitted into the original front magnet position.
About 1/2 of the magnet retainer top is removed.This helps to locate the magnet in the correct 1/3 position measured to the centre of the magnet.
The end result is the magnet sits half way into the original front magnet position.
Also removing the front half of the retainer lip allows the magnet to move higher when packed with the 4 pieces of card ( about 1mm).
If a Professor Motor Magnet 28 x 8 x 1mm is purchased it can be fitted flat on the chassis with out the packing as was done with the original Scalextric bar magnet.
This is because the Professor motor magnet has less magnetic force than the 2mm thick Scalextric Magnet.
Professor Motor Magnets are available from Thunderbird Slot Racing. Professor Motor Part # PMTR1030
It can easily be adjusted by suitable button magnets to achieve a total downforce less than the 220g required by FPR rules.
Scalextric also supply a 1mm magnet but may be hard to get supply.
The button Magnets are available in various sizes from "Guass Boys" Web Site in the USA.
The 6mm x 1mm from Guass Boys Magnets seems a handy size for adjusting down force in all classes..
There has been no rear weight added to the Camero's but if need small amounts can be added to trim the handling.
The body screws are left a little loose so the body can be wobbled a little bit.
A white round sticker is placed over the screw holes to catch them if the unscrew with vibration. A small amount of Blue Tak can also be used..
I have replaced the Guide shoe on my Scalextric Camero. You can fit a Ninco or Fly brand of guide.
This eliminates the self centring mechanism on the original guide set up.
It also means you can direct contact the motor supply wires to the contact braise with small thimbles - no iffy spring arms to make contact.
Like all cars set up for Group W round the inner & outer edges of the tires with sandpaper then finish the tread of the tire with #600 grit sandpaper.
Make sure the magnets are fitted the correct polarity to be attracted to the magnet on the corner marshal pick up sticks.
A NSR 20,000 RPM Shark motor can be fitted under FPR rules . Try it with the standard motor first as the change may not be needed.
One issue with some Camero's if you fit Pauls Urethane tyres is to make sure you hab=ve clearance to the axle bearing retainer post on the side without the spur gears. Just sand the inside edge of the tire to achieve clearance.
Most of the above can be applied to other Classic Touring Cars to set them up for FPR Class W.
You will find you are racing with characteristics very similar to handling on a wood painted surface even though we have the standard Carrera Plastic surface and some magnet downforce.
The Urethane tires even Grain up like rubber tires do on the wood surfaces. For best results the Variable sensitivity and brake controllers are desirable. This is described in a section below.
Also please check the Road Circuit Rules page for all the rules for this class.
The cars in this class vary largely in design, weight an power. So some custom settings may have to be done for each brand and model of car.
However most of the car set up is similar to that described in the Camero set up above.
The magnet still has to be in the front 1/3 of the distance between the front and rear axles. This measured from the front axle to the centre line of the magnet. This applies to all cars in this class.
There is a difference in the total down force allowed decided by the total car weight excluding the downforce. Cars weighing under 80 grams must have a maximum total down force of less than 200 grams.
Cars weighting over 80 grams must have a maximum total downforce of less than 220 grams.
For most cars work best with the magnet centre line very close to the 1/3 distance. The magnet allowed is again to be a bar magnet less than 30mm x 8mm . Some cars use the 2mm Scalextric bar magnet packed up to reduce downforce if necessary . I many cases the best option is to again use the Proffessor Motor 28 x 8 x1mm #PMTR1030 magnet. This is glued with Gell Grip flat to the car chassis in the 1/3rd position. Usually a 6 x 1mm or similar magnet was used on top to adjust the downforce as required.
We use Eurathane & rubber tires with the edges of the tire tread rounded off.
Most cars benefit from using variable controllers and variable track power supply for each lane as described below.
Most cars did not need any extra weight added to the Chassis.
Also please check the Road Circuit Rule page for all the rules for this class.
Best result so far with the F1 has been not to add any extra weight to the chassis.
The FPR rules allow a 28 x 8 bar magnet to be fitted in the front bar magnet holder of the F1 chassis Tis position is about 35% of the distance between the front & rear axles. This a down force that gave performance the same as when the standard 2mm was placed in the Rear magnet position. So no drifting was occurring.
The downforce was reduced to less than 170 g total by either packing up the magnet or preferably using the Professor Motor 28 x 8 x 1mm PMTR1030 magnet. Again in the front magnet holder and glued (Gel Grip) to hold it down on the chassis. Adjustment to near the 170g was effected by a 6 x 2mm round magnet on top of the bar magnet.
The set up produce drifting as desired but some de- sloting with power application early out of the corners. A further button magnet was fitted to the removal button magnet holder under the nose chassis. the standard 8mm x 2mm button magnet produced too much down force in most cases when combined with the bar magnet.
The answer was to fit a Professor Motor 8mm x.06 mm PMTR1037 button magnet. (these are only sold in packets 6. the fit into the holder well and a 6mm x1mm magnet usually place on top of it. When in place the 2 magnets can slide up & down the retainer tube to achieve a total down force of less than 200 grams.
The measurement of down force has to be done with the body & wing assembled on the chassis. All retainer screws must be tightened as the chassis can flex until tightened. This will upset the down force readings. Some Gel Grip should be used to secure the sliding round adjusting magnets when the correct down force setting is achieved.
The drifting was about as you get from full size formula 1 when power is applied in a corner. Lap times are about 1 sec slower a lap than cars with the standard stepped progressive bar magnets. Standard flat bar magnets must be used to get the desired handling from the front magnet position.
The rear tires are the MJK brand as specified in the FPR rules. The edges ore nicely rounded And the tires are sanded round with #80 Grit sandpaper. They are then finished with #600 Grit sand paper. This grit is used before using the car at each session or race meeting . Further sanding or cleaning is usually not necessary for the whole of the session.
The tires "grain up" on the surface similar to wood track operation
If the front axle assembly has lost some stabilizer bars it will become sloppy . This allows tipping to occur in corners. I have glued (Gel Grip)the center of the axle assembly to the nose chassis. Be careful not to glue the axle shaft as well! Place chassis on a flat track ortest block while glue dries to get correct wheel alignment.
Please read information below in regard to variable controllers and also variable track power to each lane.
Also please check the Road Circuit Rule page for all the rules for this class.
Although performance may be satisfactory with standard track power & controllers some benifits can be achieved in adding the following equipment.
Before acting on the following information please note : The FPR track does not use the standard Carrera wiring . It is wired directly to the rails . It is set up to be " POSITIVELY WIRED".
Carrera & other "home track" brands are usually wired through the company's own supply section. They are " NEGATIVELY WIRED " Damage could occur to this and controllers could occur if wired incorrectly.
Positive wiring is used by most commercial and private hand built wood routed tracks.
To help give very fine control of the Formula 1 Group W it is desirable to use a Variable Sensitivity and brakes controller. Same deal as on the painted routed wood tracks.- These are also handy for all other Classes in Group W as well.
In Addition !
We have added a 15 amp voltage control in the supply to each track. this is mounted so the driver can adjust voltage while driving. It is wired in series to both positive & negative power lines & is placed in between the supply and the controller plugs. It is very helpful for all Group W classes as well - especially the F1-
The Voltage Controllers (one required for each lane) & wiring directions are available from Kitstop in NSW Web site: http://www.kitstop.com.au/page10.htm
MXA 033 15Amp PWM Controller In most motor driven positioning and control situations the MXA 033 will do the job. HHO experimenters using multiple bubbler cells in series have also found that the MXA 033 is well up to the job. This economical and powerful little unit controls 15Amps 12/24DC and runs at a modest 100Hz. The mark/space ratio is adjustable from 0-100%
Ask us how to upgrade this unit to a cool 20Amps or more. Economical at $AU19.88 including GST plus $6.45 Pack and Post
Boxes are also Available to hold the controller board $10.21(+ postage of $6.45)e Five Pack FB03 General Purpose Box (A) 69mmx105mmx38mm. Internal space 65mmx 98mmx34mm. Suitable housing for relays or a speed controller circuit.
You will also have to get a knob for the power adjusting pot and also the wire (4mm) and push on terminals.