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Discussion Starter · #1 ·
Found some people who race NASCAR without mag and without the interior. Track, Scalex Classic. Right now I have some lead tape behind the giude and PPR tires and one with Indy's. I noticed in the turns the tire seems to grip, which makes the rear of the car bounce. If I slow down on the turn it's fine. This will be my first time racing. I've been doing this for three years and never had the chance to race.

Tony
 

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Matt Tucker
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OK excuse my english I can't be bothered to type it properly. I've raced NASCAR on routed so magnet is just a weight but had the interior which I taped down. Got to be a sidewinder much quiker as wt better distributed. Run the engine in and oil it - get a good motor. Add some lead in front of the rear tyres I found 4g each side was optimum and 3g in up by the guide. Remove all sideways slop in axles.

Lower the front post so it sits lower, remove the exhaust and trim the chassis about 1mm all the way round. Expand the screws a bit so that if flexes real good. Glue everything donw incl tyres to rims and rims to axles and lower the profile of the rear tyres by about 1-2mm and the front 2-3mm. Varnish the front tyres and as it was run on roted I fixed the font axle so the wheels were <0.5mm off the track - you'll need vertical movement in the frint axle to cope with the bumps on classic track.

We had to use stock tyres but softened them with lighter fluid.

Play with the wt distrb which will make the car handle very diff and depend on the type of track and your driving style preference.

Matt
 

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One tip I found was to make sure the edges of the Scalex rear tyres are rounded to help the rear to slide rather than tip. Not sure if this idea applies to the PPR's though, i haven't used them.
 

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Discussion Starter · #4 ·
with PPR, the tires really grip but thecar acts weird in the turns. The track won't let go (good grip) so it hops around the turn.

Tony
 

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Hi Tony

Tucker is right...... The first thing you need to do is go over the chassis, glue in your oilets ( axle bushings ) and take any slop out the the rear axle... Also check and see how much slop ( play ) there is in the bushings to start with... loose bushings or too much slop in the axle bushings can cause the hop problem you are having.....

Another cause is you might have a bent axle?? This will also cause the rear end to hop....

Try swaping out the rear axle unit with another car the runs well and see it the car still has the problem...... it it doesnt then the problem is the rear axle unit in the car.... if you still have the problem then you need to start playing around with the weight..... Slick7 makes some good stick on lead sheet that I use on all my cars....

I dont run many RTR cars on my track, mostly scratch built cars. But I have the same problem from time to time..... And I found that playing with and adding more weight to the chassis will cure the problem.... With my chassis I find that I am just getting too much traction.... I start adding weight to just behind the guide and then put weight on the out side parts of the chassis and this will cure the problem..

Chris.......
 
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