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Tuning an AutoArt

4819 Views 21 Replies 11 Participants Last post by  stoner
Well now we've got a class for AutoArt 'supercars' - the performance of which is generally anything but. Wobbly gears, loose tyres and general graunchiness abound, so it's now become the club's only tuning class.

In fairness I've never had a problem with my original choice - the Porsche 997 Carrera. It's pretty and, with a load of weight stuffed in the nose, has a very nice habit of drifting gently through the corners. Here's the old original:

With a decent amount of acceleration my 997 is one of the fastest 'stock' cars (mag removed) at the club, but because of chronic unreliability we can now tune our AutoArts. Tyres, hubs, axles, gears and pinions are free - although motor, guide and chassis must remain as standard. Given the yellow peril's rear-mounted motor she's not going to be able to live with more conventional arrangements, once they've been tweaked, but I wanted to stay with Porsche and so got a traditional mid-mounted sidewinder within the rather lovely 996 GT3R:

And so to a bit of tuning...

First off I've removed the retaining spring on the front axle which pushes it down towards the track. I hate front-end deslots with a passion, and increasingly find that highly detailed slot cars are build as shelf queens with no thought for whether or not the front wheels will lever the guide out of the slot. I've also unscrewed the magnet and fitted wheels and axles from the Scalextric Porsche GT3, which are wider and hopefully will give a bit more grip than drift:

Eagle-eyed viewers will notice that the rear tyres are different. I've gone for Ortmanns, as Scaley typically doesn't do a great compound for non-mag running.

Everything sits together reasonably well but there's a hefty amount of slop in the rear axle now - about 4mm worth! I've ordered some shims but also decided to go for a Slot.It axle and gears - 12 tooth pinion and 36 tooth crown. I think it's about the best balance in ratios for our track.

The bits should arrive in time for next week, when I make a belated debut in the class. It's hardly the biggest tuning job in the world but hopefully, once run in and with a bit of weight behind the guide, will be able to keep pace with the Gallardoa, Murcielagos and Koenigseggs.

I'll let you know!
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I liked this thread so I grabbed an Autoart GT3 for 14 quid - my first Autoart car. The chassis looked good. Plenty of room. Bushes for the front axle. Sweet.

I wish now that I'd tried it with the original pionion / gears but got ahead of myself and pulled a Slotting Plus 7.5mm pinion and a Slot It 18mm 36T gear out of the parts bin. I cleaned up excess flashing off all the wheels, glued and trued the fronts and put some NSR ultragrips on the back end. I like lots of body float so I shaved the chassis perimeter and drilled out the chassis body post holes. I don't like lights so I stripped the lighting rig and got rid of all the resistors on the motor. I added weight and put a collar around the guide shaft to stop vertical movement. This guide mod effectively dropped the front end 2-3mm.

As you see the collar is just brass tube cut to size. I used a piece that fit easily over the guide shaft, then squeezed one end with pliers until the I got exact amount of guide movement I was after. Try it. It works.

I set the front ride height using a set up block - making sure the guide was as deep into the slot as possible - and glued the front bushes in place. I glued the rear bushes and motor in too. And I got rid of the self centering guide spring.

On the track this set up was surprisingly good. On my 95' wood track it was lapping in 7.8s - not fast but not shabby - but the car was stable in the corners, very hard to deslot and obviously had more in it. I thought the body rock was the issue so I shaved off the 'cups' at the top of the chassis posts and replaced the screws with thinner ones.

That smoothed that car out and it laps in 7.5s now. On my track anything that gets into the 6sec bracket is quick - so 7.5s is a respectable time - especially for a car with a narrow chassis and full, detailed interior. Put another way, this Autoart car with a 18k motor is just off the pace of a Slot It car running an orange endbell.

I was pretty happy. I'd avoided this brand - but I can now see more Autoart cars in my future.

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