BARC Shell Porsche - the test
Posted: Sat Apr 04, 2015 10:36 amYHR (from SCI) asked if i could test his car on my track, to get a feeling how his cars handle. Being too late for the ProNoMag, i tested the car in the same way as it had been entered in the race. Posted here as well, as i thought it might be interesting ...
For comparison i took the #43 Mini out for timed laps. track conditions may differ from the race day on the Desmo, my condition will differ, too, so having a car out which ran in the ProNoMag 2015 will allow to compare the results better. A closer look on the Mini during a short inspection revealled that the rear right bearing could use a drop of CA to tighten the axle play a little, but i will do that later. Just a little lubrication for the Mini. But this was only for lane 3. Going to lane showed some grip problem. Decided to do a short tire sanding before starting the track cleaning run (app.100 laps to get the driving lane free, as the track has not been used for 2 weeks). This showed that there has not been any tire left to sand LOL. So, the blue Mini took over. During the test laps, the blue and the red Mini had very, very equal lap times, so it will give a good comparison, too. So, lane 3 was with the red Mini and lane 1 with the blue Mini.
YHR Porsche:
11V, 45 ohm
very fast on the straights, like a turbo charged cars, but with really good breaks, too.
After changing the rear tires from stock Kyosho tires to CarGo custom high grip tires, the Porsche showed the potential it got.
Several things did not allow faster lap times on the Desmo, starting from the front: very stiff guide wires, sliding through tight corners nearly impossible, the guide blade pushes the rear end out, the drive is not smooth. Left front wheel hanging in the air by 1 to 1.5mm. I know this can be cured with hot water and pushing, but hey, this is the ProNoMag and i do not have enough time to work on my cars and so, i left the front end hanging in the air, like i would have done on others cars that came for the race. Front axle bearings - not having another proper name for these wide, big holes that will not support the front axle in a proper way. The wheels can move in each direction they want, not sideways, but up, down, left and right, but still not allowing the fronts to touch the track.
Now, the middle. Here, the only support for the body comes through the chassis to a single post. The read end has an artin style support with a square piece of PS with a counter part in the body to fix the body in a more or less specified position. There are many other ways to fix a body on the chassis and most of them will work a little better. I prefer 4 screws on the side between the wheels (2 on each side).
Motor position: the very good motor is angled upwards like on Artin or DSlot cars. Makes a awefull center of gravity, which can be felt while driving. Next time, place the motor horizontally in the chassis, this lowers the CoG and helps handling a lot.
motor position part II: the standard DSlot pinion is way too long for no magnet racing. cut the half off and the motor will go backwards, which will help handling.
gear mesh and rear bearings: these parts work really good.
front tires are sealed and seem to be round, cannot check, see axle bearings.
Rear tires: CarGo tires work great, but if the tires where glued to the rims (full surface glued!), it would be even better. I gave the tires a little sanding to get them in contact with the track.
Strangely, the tighter lane 3 was easier to handle for the Porsche than the wide open turns of lane 1, but maybe it was due to the tipping in the turns and the tendency to body roll in the slower turns?
So, to describe the driving a little more: Out of the turns, into the long main straight, the turbo fires the little Porsche out on the straight, which it will inhale in the blink of an eye. Seeing the long, wide turn, the Porsche will hit the brakes (i think there ceramic brakes installed!) and brakes for the turn. With the correct speed, it will go into the turn very fine, be too fast and the stiff guide wires will kick out the car off the slot, at least it feels like this. Surprisingly, the slower esses are no problem, the motor has a nice, not too powerfull mid range that will give a very good response their. Be carefull in front of the the tighter turns, as the high center of gravity will barrel roll the Porsche also in the blink on the eye. But then, the big time arrives again and the Turbo will kick the Porsche out into the straight :D :D :D
[COLOR="Red"]So, here is the time table: [/COLOR]
Thanks for letting me test your car, i´m looking forward to the next one :D :D :D
Ciao,
Peter
For comparison i took the #43 Mini out for timed laps. track conditions may differ from the race day on the Desmo, my condition will differ, too, so having a car out which ran in the ProNoMag 2015 will allow to compare the results better. A closer look on the Mini during a short inspection revealled that the rear right bearing could use a drop of CA to tighten the axle play a little, but i will do that later. Just a little lubrication for the Mini. But this was only for lane 3. Going to lane showed some grip problem. Decided to do a short tire sanding before starting the track cleaning run (app.100 laps to get the driving lane free, as the track has not been used for 2 weeks). This showed that there has not been any tire left to sand LOL. So, the blue Mini took over. During the test laps, the blue and the red Mini had very, very equal lap times, so it will give a good comparison, too. So, lane 3 was with the red Mini and lane 1 with the blue Mini.
YHR Porsche:
11V, 45 ohm
very fast on the straights, like a turbo charged cars, but with really good breaks, too.
After changing the rear tires from stock Kyosho tires to CarGo custom high grip tires, the Porsche showed the potential it got.
Several things did not allow faster lap times on the Desmo, starting from the front: very stiff guide wires, sliding through tight corners nearly impossible, the guide blade pushes the rear end out, the drive is not smooth. Left front wheel hanging in the air by 1 to 1.5mm. I know this can be cured with hot water and pushing, but hey, this is the ProNoMag and i do not have enough time to work on my cars and so, i left the front end hanging in the air, like i would have done on others cars that came for the race. Front axle bearings - not having another proper name for these wide, big holes that will not support the front axle in a proper way. The wheels can move in each direction they want, not sideways, but up, down, left and right, but still not allowing the fronts to touch the track.
Now, the middle. Here, the only support for the body comes through the chassis to a single post. The read end has an artin style support with a square piece of PS with a counter part in the body to fix the body in a more or less specified position. There are many other ways to fix a body on the chassis and most of them will work a little better. I prefer 4 screws on the side between the wheels (2 on each side).
Motor position: the very good motor is angled upwards like on Artin or DSlot cars. Makes a awefull center of gravity, which can be felt while driving. Next time, place the motor horizontally in the chassis, this lowers the CoG and helps handling a lot.
motor position part II: the standard DSlot pinion is way too long for no magnet racing. cut the half off and the motor will go backwards, which will help handling.
gear mesh and rear bearings: these parts work really good.
front tires are sealed and seem to be round, cannot check, see axle bearings.
Rear tires: CarGo tires work great, but if the tires where glued to the rims (full surface glued!), it would be even better. I gave the tires a little sanding to get them in contact with the track.
Strangely, the tighter lane 3 was easier to handle for the Porsche than the wide open turns of lane 1, but maybe it was due to the tipping in the turns and the tendency to body roll in the slower turns?
So, to describe the driving a little more: Out of the turns, into the long main straight, the turbo fires the little Porsche out on the straight, which it will inhale in the blink of an eye. Seeing the long, wide turn, the Porsche will hit the brakes (i think there ceramic brakes installed!) and brakes for the turn. With the correct speed, it will go into the turn very fine, be too fast and the stiff guide wires will kick out the car off the slot, at least it feels like this. Surprisingly, the slower esses are no problem, the motor has a nice, not too powerfull mid range that will give a very good response their. Be carefull in front of the the tighter turns, as the high center of gravity will barrel roll the Porsche also in the blink on the eye. But then, the big time arrives again and the Turbo will kick the Porsche out into the straight :D :D :D
[COLOR="Red"]So, here is the time table: [/COLOR]
Thanks for letting me test your car, i´m looking forward to the next one :D :D :D
Ciao,
Peter
