917 rebuild

[Brumos RSR]

Rebuilt the 917 today, cleaned, rebuilt the chassis, no changes just new axles and bushings and a new body. Car seems to be improved again.

[arroldn]

Not a silver Porsche Let me guess #33

[Brumos RSR]

If it races again yes, definately. It's probably a car length or 2 slower than you amazing #21 or DRW21 #35 Mclaren, but it's better than it was. It ran 5.6 at the River Run which is a track I use for all my comparisons, in 2016 it ran 6 flat. I think it will run 5.5-5.4 now at RR. I just realized this chassis, car, parts is over 6 years old. I think I have 3x the cost new in it. It's like maintaining a Ferrari

[arroldn]

Always a good thing when you are moving forward. Like trying to get my Porsche 911 to stop wanting to roll over. Went to a shorter front tire but if you push it, will still roll on you. Tomorrow I'll see if changing the gear ratio which should also give it more brakes will make a difference. If I can't get it to run with the Ferrari I may have to dump the Policar motor or just go with the Vette.

[slothead]

What's a good treatment for a tendency to rollover? I would think adding weight to the front half of the car and as low as possible. What about guide depth in the slot?

[arroldn]

I added a deep Sloting Plus guide to it. I have put weight in the front and under the front half of the chassis. The thing is it is now to slow. A gear change may help. It is the Policar 25K motor currently geared 3:1. I have read it needs to be geared closer to 3.50:1. So I'll keep playing with the weight and do the gear change.

[Brumos RSR]

Try weight on the sides like your Huracan.

[Audi1]

Always a good thing when you are moving forward. Like trying to get my Porsche 911 to stop wanting to roll over. Went to a shorter front tire but if you push it, will still roll on you. Tomorrow I'll see if changing the gear ratio which should also give it more brakes will make a difference. If I can't get it to run with the Ferrari I may have to dump the Policar motor or just go with the Vette.

Try more weight down low in the chassis; the 911 is, generally, a narrow track, high CoG car, so lower the CoG. and set it up with some drift to it.

Allan

[arroldn]

Allan, Brumos
It may be more the National Racer 3D chassis. It tends to roll/flip with no body. I will try all suggestions with the body off and go from there. The best 20 lap time I could get was 1 min. This is 4 secs off the pace of the Ferrari. Just trying to improve on last years performance. I feel the Italian Stallion will be up to the task.

[ZackM]

Looking good Tony!

Zack