RX8 Renesis Rotary eSC
- Thread starter brettus8
- Start date
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!
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!
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.
Last edited:
r.brown.bayliss
Member
Wow, 30% more air and fuel, that must be why people say they are uneconomical
They ARE uneconomical................. which is how we like it
r.brown.bayliss
Member
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 literThey ARE uneconomical................. which is how we like it
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
My RX8 actually gets better mileage than that.....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 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
Member
Everything does I put a 4.36 final drive gear in it which is what kills the millage
I put a 4.36 final drive gear in it which is what kills the millage
r.brown.bayliss
Member
I just assumed they would be about the same size, give or take a few mm
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.
Have not hooked a gauge up yet but I suspect it's around 5psi lower down and 4psi up top.
Is it maxed? .......... I dunno. The more I experiment the more It hits home that the ratings for all this componentry is based on continuous current so can be exceeded by a wide margin for short bursts.
I can say the 70125 motor is def. running cooler than the Castle was so can probably take quite a bit more.
Is it maxed? .......... I dunno. The more I experiment the more It hits home that the ratings for all this componentry is based on continuous current so can be exceeded by a wide margin for short bursts.
I can say the 70125 motor is def. running cooler than the Castle was so can probably take quite a bit more.
r.brown.bayliss
Member
r.brown.bayliss
Member
I don't know why there is so much fuss about crank power, it's always a 'best guess' and probably over inflated but it seems in the UK and US they talk about it a lot, many of the charts seen claim engine power some how
At the end of the day power at the wheels is what is doing all the work