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men ,men...

Tuning Tips

I´m some what new to racing and would like your help.
I´ll try ....
How do you "true tyres and what does it do?
OK, mass-produced cars will never have properly fitted tyres. So you need to examine each wheel, and make sure the tyres are seated properly giving a perfectly round profile and even gripping surface. Here´s a test: put the car on the track, and place one finger in front of it to stop forward movement. Now gently, and increasingly, apply throttle. Does the back end jump around vioplently, or does it just slither a bit? If the rear wheels bounce, the tyres are out of true.
If truing by hand doesn´t solve it, then the tyres themselves may need attention. Place some fine sandpaper under the rear tyres, apply gentle pressure to the back end whilst preventing forward movement, then apply some throttle. Try to move the tyres around on the sandpaper to prevent grooving. Examine the tyres: you should see even wear accross the whole width of the tyre. Then repeat the "bounce" test.
But, it´s a trial-and-error thing I´m afraid.
Please explain gluing the motor mounts and the motor to the mounts. What does it do?
Firstly motor to mount. On all except screw-fitted motors, there will be some "play" in the mount, ie the motor will move in the mounts. This reduces the power transmitted. Carefully applying glue in the brackets before snapping in the motor will prevent the motor shifting. CARE! If you use SuperGlue or similar you may not be able to get the motor out again!
Secondly, mount to chassis. This only applies to NINCO-type chassis where the motor mount is separate. They do this so they can supply different sized motors to the same chassis. Again, the fit isn´t perfect so the mount will move in the chassis. Gluing the mount prevents movement and improves power transmission. The same CARE warning applies!
What kind of oil should be used and where? The manual says not to oil.
A light machine oil should be used on the axle bearings and motor shaft bearing(s). The axle bearings are easy, generally white or brass rings where the axle is fitted to the chassis. Apply a small drop as required (I do this before every race and/or test session). Be more careful when applying oil to the motor shaft bearings; the manual is warning about getting oil inside the motor, easy to do especially if the windings are visible. Oil should be applied to the shaft on the OUTSIDE of the motor casing, just by the pinion. If the motor shaft protrudes through the other end of the casing, apply a drop there as well. Again, I do this before every race.
Is unscrewing chasis a trial and error kind of thing, sometimes it helps others not?
Yes, sorry, though most cars benefit from it. A less rigid rear end helps prevent de-slotting on corners. Think of it as "suspension".
What is a tyre cleaner made of?
I use lighter fuel. The thin petrol that used to go in cigarette lighters. In the UK it´s still available from tobacconists & newsagents. TAKE CARE, it is FLAMMABLE! Hold the car upside down and allow a few drops to fall on one tyre: the can normally has a nozzle that makes this easy. You should see the fuel run round the tyre so it looks wet. Then hold a clean cloth against the tyre, and rotate using the other tyre. You will be amazed how much dirt comes off. Repeat with the other tyre, once again before each race.
I have added weights but find that the lightest amount seems to slow the car down and doesn´t help handling. Should it generally be over the guide?
I haven´t had much success with weights. If the guide pops out of the slot frequently, put it over the guide. If the tail slides around when you apply power, put it by the rear axle.
Hope this helps some! You might like to read reports of my racing experiences too!

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