Back again for an update.
The bike is riding ok now, but it has less torque for hill climbing than on the old controller, but does seem to have a little bit more top speed on the flat.
I dont think its voltage sag or the bms holding the power back as i'm drawing a solid 19.7 amps going uphill at full throttle with a steady 35.8v showing after about a minute of hill climbing at full power as the lowest voltage, this recovers is seconds back to about 38.5v once off the throttle.
I've played with P1 and P2 now, and only P1 seems to make any difference and it very very minimal, It seems best set at 90 - 100.
I've also been playing with C2 and this makes quite a big difference to the smoothness, power and quietness of everything with C=3 and C=5 giving the best results, setting C to 1,2 or 4 makes it cut out a few seconds after applying the power and you have to release the throttle and reapply to make it work again for a few more seconds, C=0 seems to be worse than 3 or 5 in terms of noise and power.
So i'm now thinking that my motor (as detailed in my first post) just isn't compatible with the KT controller i've chosen and wonder if the old controller was a square wave and moving to this more powerful sine wave controller has caused all the issues.
So i'm now wanting to keep the KT controller as they seem to get good reviews and now buy a new rear hub geared motor and i'm thinking that the MXUS seems to fit the bill for best compatibility ? what does anyone think ?
I have 16" wheels, so i'll get suitable spokes and a rim and lace it up myself and am hoping to get to the 500W of power that i'm after for really good hill climbing (i'm not worried about top speed and don't want to go fast at all) and reading lots of reviews and forums, it seems that as long as i can find a decent and KT controller compatible hub motor, then everything should be perfect !!
So does anyone have any motor suggestions ? or other ideas that i might try ? and if the battery does prove to be not up to it, then i am experienced at battery building and happy to build a better spec battery, even going to 48v if necessary (but would prefer to stay at 36v to use the existing battery i guess)
Thankyou for all your help and suggestions with all my troubles with this bike, and it was really interesting to learn about and figure out all the different wiring configurations !
