Originally Posted by jk1981
Personally I'd go the other way: Sell the Scoobie motor, keep the weight down, install a big power (200-300kW), low-medium energy (maybe 5-6kWH, 50-60kg Lipo) electrical system with a very small motorcycle ICE providing maybe 10-15Hp of parallel hybrid cruise power. That way you get good fuel efficiency, normal range and very good peak performance.
This is an excellent idea for an 818 build if you didnt have an sti and started from scratch because the end result for the cost of the build would be phenomenal.
With a 15kw ICE and high powered netgain you would have a car that would equal the standard build in power, weight and range without using a drop of dirty fuel. And all for maybe a 15k premium, taking the build cost to around 30k.
For me, the loss I would take from selling the unneeded parts from my car would be too great. The motor, although on stock internals is very high output and I consider a total weight of 2200ish pounds is still very lightweight for a hybrid, or any performance car for that matter.
Due to the info I gathered from the advice you gave I think the scope of the project can be extended somewhat.....
The current estimate of weight distribution is 38/62 meaning that the front has 200kg less on it.
Going the netgain 9" route with a decent controller etc will leave plenty of room for battery weight while being able to maintain a 50/50 weight distribution.
If the Subaru motor output is increased to 500hp through a $6000 turbo and computer system upgrade I cab purchase, with the 300+hp input of the netgain we would have a p2w ratio of 800hp per tonne for acceleration/top speed purposes.
If you then add in the instant torque characteristics of the Electric motor, you will be able to eliminate wheelspin at launch. Being able to get that much power to ground at launch will leave any supercar for dead.
The Lambo Aventador has a p2w of 400hp per tonne, 4wd and sophisticated launch control and completes the 1/4 in 10 odd seconds.
Depending on proper calculations, the battery pack could weigh as much as 90kg while delivering this performance.
If you chose to drive only the electric motor you could still commute on a day to day basis (50km max range?) for the running cost of a chevy volt.
Start the ICE and the car's acceleration potential exceeds any other car on the road.
The first orders are expected to be available "Before Autum" according to factory five which leaves plenty of time to agonize over final decisions and design front axle setup...