RX8 Renesis Rotary eSC

I think I've got the same bug Alex has! Bigger (70125) motor coming to replace the Castle 2028.
Really feel like the car has to make close to 300whp for the eSC to make the statement I want it to. This motor should get me close - fingers xd.
 
What’s currently the bottleneck in your system? It simply does not want to spin any faster? How much current is the system currently drawing?
Did you already try with other pully ratios?

I'm guessing the 70125 should be able to pull some more current without melting apart. Looking forward to the results!
 
wkerstens said:
What’s currently the bottleneck in your system? It simply does not want to spin any faster? How much current is the system currently drawing?
Did you already try with other pully ratios?

I'm guessing the 70125 should be able to pull some more current without melting apart. Looking forward to the results!
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I've seen as much as 260A at 47 volts. The thing is that it seems to me that I'm at the point where there are diminishing returns when putting in more power/changing the pulley ratio. Changing the motor should tell me whether that is in fact the case.
Something that many here may not be aware of is that a rotary requires 30% more air to make the same horsepower that a piston engine does. So my 260 would be equivalent to around 340whp on a piston engine.
 
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brettus8 said:
They ARE uneconomical................. which is how we like it ;)
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My Nissan does 5.3km per liter when pottering around in town at normal road speeds, on 98 petrol it is also uneconomical. On the open road it can get almost 8km per liter 🤣 I think that works out at 12mpg for our American friends around town, and 19ish on the highway. or 19 liters per 100km town - 12.5 liters per 100km highway

I used 1 liter per lap on the track at Pukekohe when it was still open, 34.4 liters per 100km, 6.8mpg but that's foot to the floor all the time basically. My Maserati is almost free to drive by comparison 🤣
 
r.brown.bayliss said:
My Nissan does 5.3km per liter when pottering around in town at normal road speeds, on 98 petrol it is also uneconomical. On the open road it can get almost 8km per liter 🤣 I think that works out at 12mpg for our American friends around town, and 19ish on the highway. or 19 liters per 100km town - 12.5 liters per 100km highway

I used 1 liter per lap on the track at Pukekohe when it was still open, 34.4 liters per 100km, 6.8mpg but that's foot to the floor all the time basically. My Maserati is almost free to drive by comparison 🤣
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My RX8 actually gets better mileage than that.....:LOL:
 
Wow. That motor is huge! Really looking forward to your results. The shaft seems bigger as well, requires a new pulley?
 
Shaft size is the same . Got a 22T (at 560Kv) pulley which should give close to theoretical same speed as the Castle was (15T and 800Kv). So it should be a good performance comparison.
 
Tested the new motor. Performance is practically identical, same power from engine, same power consumed by motor. I do feel like the new motor will handle higher loads with ease though, so am ordering a larger pulley.
 
Have just found a weakness with the drive pulley on this new motor setup. The M5 grubscrews holding the toothed pulley are insufficient for the job. The one that tightens onto the flat part of the motor shaft basically twisted in it's thread and allowed the shaft to rotate past it. My plan is to fit longer grubscrews and increase from two to four. Fingers xd that will be sufficient. Never had this issue with the 2028 Castle motor but that spins faster so .... less torque on the shaft.
 
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