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I've been tinkering away on converting a low mileage Toyota IQ (2012, 16k on the clock, 1020kg after conversion) with a Hyper9 kit from EV West and a 30kw battery pack.
I've made some design decisions that are bound to raise a few eyebrows. The big one is to retain the CVT gearbox including the torque converter! The next is to keep the alternator, AC unit and power steering 😊 Do these design decisions work? “Hell yes!” the car goes like a cut cat (off public roads of course!), as it hasn’t been certified yet. The CVT keeps the Hyper9 in mid rpms while applying smooth, buttery power to the front wheels. That’s not to say that it's tame, if I pull on the hand break on a hit the throttle it will spin the front wheels or drag it’s arse along the tarmac 😊.
The big secret with retaining the CVT is to spoof as much of the original engine sensors as possible and to use the blended Torque and Speed setting in the X1 controller to apply smooth and controlled power and to idle the motor at about 900rpm when the car is stationary. This approach provides oil pressure for the CVT and powers the alternator so that the electric steering remains active. No need for a DC to DC converter! Also no need for extra micro controllers and custome software to make it work.
I don’t have the range and top speed info as the car needs to pass certification before I can take it on longer road trips. I’m keen to hear what the community thinks of my project and the design decisions I’ve made. Cheers Peter
I've made some design decisions that are bound to raise a few eyebrows. The big one is to retain the CVT gearbox including the torque converter! The next is to keep the alternator, AC unit and power steering 😊 Do these design decisions work? “Hell yes!” the car goes like a cut cat (off public roads of course!), as it hasn’t been certified yet. The CVT keeps the Hyper9 in mid rpms while applying smooth, buttery power to the front wheels. That’s not to say that it's tame, if I pull on the hand break on a hit the throttle it will spin the front wheels or drag it’s arse along the tarmac 😊.
The big secret with retaining the CVT is to spoof as much of the original engine sensors as possible and to use the blended Torque and Speed setting in the X1 controller to apply smooth and controlled power and to idle the motor at about 900rpm when the car is stationary. This approach provides oil pressure for the CVT and powers the alternator so that the electric steering remains active. No need for a DC to DC converter! Also no need for extra micro controllers and custome software to make it work.
I don’t have the range and top speed info as the car needs to pass certification before I can take it on longer road trips. I’m keen to hear what the community thinks of my project and the design decisions I’ve made. Cheers Peter