Slot Cars Adelaide

Scalextric V8 Super Car Racing Set up Recommendations

     Scalextric Australian V8 Super Car - standard chassis.                                         Many suggestions in this article apply to most slot cars

           Set Up Recommendations - updated June 2015

 It has been indicated  the older versions of the Scalextric Super Car can be made to perform well with modification. 

Motor Pinion & Rear Axle spur gear

 One of the Modifications is to change to metal gears - spur gear and pinion. I prefer the NSR gears but Slot.it are probably just as good. I have found the Scalextric  plastic gears seem to perform well  so you may not see  big benefit fitting metal gears. So I would try the original gears for performance before changing. 

Generally the 11 tooth pinion is used. The shaft of the Mabuchi motor is swaged to take the original plastic pinion. The high parts should be leveled to the same diameter as the section of the shaft that is not swaged.

 The Spur gear should be in place first so that the pinion gear can be pushed on to line up with it.  The spur gear required if replaced is a 36 T 

 All should suit the 11-tooth pinion (of the same brand) and be the same external diameter of 18.5mm and fit a 3/32' axle. The NSR uses a 4.40 grub screw. Slot.it use the smaller M2 grub screw.

 Rear Axle Bushes

 NSR rear axle bushes are good quality with a lubrication recess on the inside of the bearing. Other brands of rear axle bushes can be of similar quality.

Sloting plus have eccentric bushes that lower the chassis height. They are available      in 3mm & 6mm offset. These are used in the Holden and the older Ford chassis but    not in the newer FG Falcon chassis as that is already low enough.

  Once clipped in tho the chassis so the offset is correct and the 2 indents line up vertically I carefully put some drops of Super Glue (Locktite Brand is my favourite). This is added to the channel  in the bush that clips into the plastic chassis. The Super  Glue runs around the channel to secure the bearing.

You probably are unable to remove the axle bushes without damaging the chassis clips so be careful the set up is correct before super gluing. I have seen some super glue dissolving  compounds advertise but have not tried them. 

 Rear Wheels & Tyres

 Rear wheels - I suggest the 13mm MJK air ride - lightweight rims. But again there are many options. They have to end up with the maximum track that is able to fit within the body. The original wheels may have  good enough in performance  so it may not be an advantage to change to a metal gear. There is a small hub protruding  on the rear face of the MJK 13mm wheel - this has to be removed to enable fitting within the body width.

The widest tire  that can fit is the 4205 pro slot size and may have to be trimmed  to fit  under the rear guards of the V8 Super Car later models .                                    Some select MJK 20x10 for Slot.it for the rear tyres .These usually fit without need to trim and do perform well.

Rear tyre truing can be done on a tyre lathe but most seem to perform well with out that with 4  small dots super glue applied on each bead of the rim with a tooh pick . I usually alternate driving and running the tyres on the sanding block until true. 

Front Wheels & Tyres

 The original front wheels & tyres  can be used but roundness must be checked . Sometimes the tyres can be reduced in diameter a small amount by sanding on the tyre lathe. This is to lower the front of the chassis and reduce clearance between the track and the chassis . This means more bearing on the guide & braids and making the front tyres so they just touch the track surface. 

We can advise on methods to do this operation  if you ask we can detail what options there are to reduce tyre size & true the tyres                                                                Once the front tyres are fiited and trued it my pay to put some super glue in three spots around the rim beads to hold them in place on the rim. 

The other alternative is to fit a new axle & removable alloy rims to the front  . This simplifies  truing the front tyres and adjusting the chassis height.                            The chassis height should be such that the front tires just touch on the track when the guide with braid fitted is in the slot.

 Front Tyre anti drag treatment

If you do not have low slip tires fitted coat the front  tires with nail polish. Bostic Multi bond glue very good & durable for coating the tyre. This is easy to apply by placing a bead of glue around the circumference of the tyre  & the smoothing it around the tyre while rotating the other side wheel . I use a finger to smooth the glue over the tyre surface evenly while the wheel is rotating . It has to be done in only one revolution though.  

 The Guide

The guide is usually changed to a deep wood guide in place of the Scalextric plastic track guides. An "adapter " is needed to reduce the diameter of the guide post hole in the chassis.

These are produced by Nova - B  and the 1/32" thick adapter is correct usually.   Before fitting the adapter, the flange at the top the guide post hole has to be removed  so the new guide post will pass through

When fitting the adapter.  Just apply glue on the flat flange of the adapter. - not down the guide post hole.

I prefer fitting a "suspension"  Guide. This allows for undulations of the track braid. and sharper and up hill corners.                                                                                    This is a guide with a longer post. If it is a "clip" in post  a spacer is fitted at the top of the pole to prevent the guide dropping more than 2 mm . This enables the guide to hit the chassis turning stop without the guide from rotating too far. A correct  tension spring is fitted between the base of the guide and the chassis to provide the suspension of the guide. Some do not like this method but I have had success with a wide range of slot cars. 

Make sure the guide is free to rotate &  self-centers. Self centering can be achieved by the correct placement of the motor wires. The self centering is highly desirable to assist corner marshals to quickly replace the cars after de-slotting.

Motor Wires 

I suggest replacing the original Scalextric  motor power wires. They are too thin for reliable service . Also there are plugs & wiring  & radio suppression for digital operation which are not required and can be removed . A good quality "silicon " motor wire is recommended .

Two wire eyelets are required  to fit the motor wires to the guide & the wires have to be soldered on to the motor power tabs. The correct polarity of the wires will have to be located on a test track. The positive wire goes to the right hand side of the guide.

 The body can be lowered at the front by shortening the body posts but are careful to have about 1mm  body clearance to the track.  

Rear lowering is open to debate. I would not sacrifice rear wheel track for the sake of lowering the body. Having 1 or 2mm extra rear track is far more beneficial than a 2 or 3 mm lower body.  

 To retain the body I use Slot It  2.2 mm x 8 mm small head screws. Part # CH51 they are M2 fine tread screws. They are less likely to unscrew in operation than the self-tappers. They can feel a bit hard to get down to the correct body float position. They may need alternating the direction while screwing them in. But I believe it is worthwhile fitting  the 8 mm screws as they are less likely to unscrew than the shorter screws. In some cases the 6 mm long acre has to be used if the body post is too short. 

 Added Ballast Weight

This is an area of experimentation. However quite a few seem to use a 20 mm x 20mm x 1mm block under the motor.This is fitted after removing the chassis "flutes" below the motor. This allows the weight to sit flush with the bottom of the chassis. The area is then covered with good quality wide tape - like Tarzan's Grip Tape.   This position for adding weight is the most effective one for best handling. I use this method on all Scalextric sidewinder car in the Classic Touring & GT3 classes

  Also about 12 mm by 20mm about 30mm behind the Guide position On top of the chassis . Try the 0.5 mm thickness but you may need more . 

 A 25mm by 10mm X 1mm piece of lead placed  10mm under  the  rear axle is worth while option to try  on all models of the V8's  and other scalextric chassis .As with all weight placement benefit can be gained by trying different positions and sometimes off set balance weights are helpful particularly for tracks with more corners that turn in the same direction. I call this weight balancing.                                                                             

 Motors

 Motors - the only motor allowed in this class is the standard Mabuchi 18,000 rpm (Mabuchi’s Rating). But the "Black Stripe” motor may be used.

These motors have a mixed level of performance with variations of up to 3000 rpm. So good luck if you get a "good one" Some testing with an infrared RPM meter may be of advantage to find the best motor. However this class will be subject to fixed gear ratios in 2016 . So therefore there could be a "speed limit" on the cars. This means cars over a speed figure set may have to change the motor for one of standard performance. This is to equalise the field and not to give advantage to those few "lucky" to get an exceptional motor. The gear ratio in the V8 Class will be set at 11T pinion and 36 tooth spur gear of not less than 18.5 mm in diameter 

 When the car is complete and tested it may pay to use some Araldite or super glue to retain the rear axle bushes. Also a small of Bostic Multi bond  on the motor will stop the motor dislodging . Check where to put the glue so as not to damage chassis. 

 Tire Truing - really true tires are paramount to good performance. Spinning the wheels on a sandpaper block can achieve true tires - if the wheels & axles are true to start with. 

Tire lathes can also be used. The best performance seems to be if the tire edges are rounded so no "corner" can be felt.

Any suggested improvements to this article  can be added to this article. I do not claim to "owned" by me. It is more a slot car community effort and I hope other see it in that light. The principals in this article can be applied to all slot cars and experimented with.

I believe no one in slot cars know everything and each car is an individual. So please Listen and experiment . Keep in mind if you think something is new it probably has all been done before. 

 

Scalextric VE Holden fitted with the FG Ford Chassis

 Here is how I modified the VE and improved performance.

I have found widening the front track is an advantage. I could put in 4 x 1mm washers to widen the front track to come out to the edge of the body. I then took the tires down to about 2mm sidewall to help clear the wheel arch.

  I coated the tires with Bostick Multi bond for less friction & lubed the front axle holes and ensure the axle spun freely and cleared the body. Also check for out of round of the front tires and correct.

 I have fitted the Ninco wood drop guide with a Nova B- 1/32 plate to sleeve the guidepost hole down from the larger Scalextric guide pole. You can run OK without sleeving the guidepost hole but it is better with the bushing. The motor wires have to be fitted with the Slot it eyelets to push into the braid in the Niñco guide flag.

 Good results can also be obtained by fitting the Scalextric C842O spring wood track drop guide. No sleeving of the posthole or alteration to motor wires is necessary. It can be fitted in a short time. it is necessary to fit a 1/8” washer under the retaining screw to limit the drop distance of the guide.

 Next are the alterations to the rear axle assembly.

 I fitted Slot Car Corner bronze racing bushes using their burr and mandrel kit. They have a video on the SCC site that explains the procedure for fitting rear bushes, 

 Good results can be obtained by just snapping in NSR or Slot it bushes. However the SCC bushes are slightly smaller in the mounting clip so do not distort the chassis. The burr in the SCC kit is turned by hand in the bearing holder to ensure it is the correct size for the bearing.

 This information applies to all rear axle bush conversions of Scalextric & other brands from plastic to bronze bearings.

 I fitted an MJK 3/32 Axle but removed the Scalextric Spur gear from the original axle and pushed it on to the MJK axle to the correct position.

 I used the MJK lightweight 13mm "air" rims.

The spur gear was positioned so the axle protrudes slightly through the wheel. Then I fitted the axle in the car and put on the other wheel with no washers between both wheels and the chassis.

I then measured the axle and removed it to cut of the excess with a Dremel fitted with a cutting disc.

The axle was then fitted with lubrication on the bushes. 

 The tires were MJK #4213 for Slot it 20x10. They do have a dip in the middle because of the Air rim initially. Some truing and sanding soon removes this but don't have to sand out the dip completely as it will disappear in use soon enough. 

 The standard Scalextric gears were quite and worked well. This is the case with most all FG chassis. Some of the older chassis also have good meshing gears. It may not be necessary to replace with metal gears on any of the V8's if you are happy with the performance.

 I used the Dremel and an Engraving rotary diamond file to remove some of the inner guard on the rear for more tire room. The body is fitted to the chassis using the smaller white wall plugs used to screw things to brick walls. I have some details of this on the website. That method in the article works but the plugs can be screwed in place on the chassis adjusted to the height required and then Araldited in place. Once the Araldite is set after a few hours the chassis is unscrewed and the wall plug posts are re-enforced with more Araldite.

 The tires may need the sidewall straightened by sanding to aid fitting under the body.  If you have lowered the body below the tire tread height it is a tight squeeze but works out OK in the end. Best to round of corners on the tires to help reduce “digging in” & the car tipping. 

 Weight placement is the big experiment. I have filled in the vent square under the motor with 1 mm lead. I then put strips about 3mm wide top and bottom of the chassis along the sill edges.

Plus two 4mm x 4mm pieces alongside the guide recess at the front of the chassis.

 Ok the car handled as good or maybe even better than my Ford FG (the VE has a wider body at the front) . it is doing sub 8 second laps very consistently. This was with the full size 20x10 tires. The performance should get better as the tires wear a bit.

 Please note!  It is possible the original chassis could perform just as well as fitting the FG chassis if set up to perform.

 All parts should be available at Thunderbird Slot Racing or on the net. Alternate parts to what I used can be sourced - but check they fit before buying. 

 Bring on the Holden vs. Ford battle.