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Post by Animal Mother on Nov 6, 2014 19:10:41 GMT -7
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Post by Animal Mother on Nov 14, 2014 16:15:51 GMT -7
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Post by DaveB on Nov 15, 2014 13:46:37 GMT -7
So I just did my first conversion on my Porsche GT3 and it seems to run pretty well, even has better brakes than the BRM's I think. I used a Slot-it motor with it's stock pinion that came on it. One thing I learned the hard way is make sure the pinion is pulled out to about flush with the end of the shaft. I had is out about half way on my first install and had to take the motor back out of the conversion pod. Of course it broke once I did that. The pinion wasn't making contact with the spur gear. I am running at 10 - 10.5 volts and it seems pretty lively with this motor.
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Post by DaveB on Nov 15, 2014 16:37:19 GMT -7
So I did some track test on my 1/24th stable. Fast Lap MPH Carrera Audi R8 (Paul gage tires, yellow can Slot-it 21,500) 4.959 180.4
Carrera Porsche GT3 (Paul Gage tires orange can Slot-it 25,000) 4.866 183.8
BRM Toyota (angle-winder conversion and silicone tires) 4.351 205.6
BRM Porsche 962 (angle-winder and soft BRM tires) 4.936 181.2
ScaleAuto Porsche GT3 ( Silicon tires) 4.385 204.0
The BRM motors are 27,500 with 248 g-cm torque
ScaleAuto's 22,000 with 320 g-cm torque
Slot-it's are both right around 180 g-cm torque
So if we can find a short can motor with 25000 rpm and @ 250 - 300 g-cm torque we would be all set.
Was looking and the Green NSR Shark motor is rated at 30,000 / 210 g-cm. Could be a quick little beast
The BRM Porsche needs some chassis set-up and would have been a little better if I had done that first.
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Post by Animal Mother on Nov 16, 2014 10:03:34 GMT -7
Good work! Some questions for you Davey. What did the Carreras run before the motor swap? Do the BRMS seem quicker with the anglewinder conversion? What voltage is that NSR motor rating at?
I'm going to give the RMS cans a try since that seems the least invasive and Coplar's track was closed Saturday and we found out after walking in the door...
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Post by DaveB on Nov 16, 2014 10:18:26 GMT -7
Didn't think to run the Carrera's at 18 volts before the swap. Obviously they are much slower at 10 volts with the original motors. The BRM's might be a touch quicker but my biggest thing is they are a lot more quiet.
The Carreras are more fun to drive now for me at least. They seem to respond a little quicker and it's nice not having to play with the voltage on the track. I have 5 more adapters on the way and may get a couple of NSR's to stick in them to see how they go. If I can find the connectors like the ones used in the Carreras it would be an easy swap to change motors back and forth.
That NSR is rated at 12 volts....
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Post by Animal Mother on Nov 17, 2014 20:42:46 GMT -7
I got my RMS Carrera sized motors. I'll do one up like that and see how it runs (next time I'm at someone's track).
Just wish someone made an adapter for the the BRM/ScaleAuto motors...
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Post by Escuderia Nacional on Nov 19, 2014 18:51:10 GMT -7
I will be shocked if this is a improvement
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Post by DaveB on Nov 19, 2014 20:22:06 GMT -7
So I just turned up the voltage to 15 on the track and ran my Carrera Porsche with the slot-it orange can and it was almost un-drivable on my track. It flies at that voltage, don't even want to know what would happen at 18 volts
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