Howdy, My name is Sam, and I design, program and make Razorback ECUs in Australia. The website is under construction.
I get factory AE82/AE86 4AGE and SV21 3SFE ECUs, put a board in them and give you a hand controller. They will run any 4AGE / ZE / 20V / 3SGE / 3SGTE from any ECU, single coil or multicoil. Adjustable rev limit / TVIS / VVT / fuel and timing every 500rpm to 12,000rpm. They come with internal map sensor that can handle 35psi all day every day or you can use external factory map sensors or TPS for 20V.
They come with a basic map that you can drive with, dyno tuning is always a good thing but, and should only take an hour (I did a ze last week in under 1hr).
The best thing is the price, $600au exchange or $700au outright.
The handcontroller has live adjustments and live engine data and is backlit.
As I am the designer and programmer, I can make custom changes on request.
I am putting one in my AE95 soon as it is laggy, I am sure it will be a lot better to drive when I am finished.
My SC14 ZE KE70 panelvan did a 14.38 with traction problems.
Thanks
Sam
http://users.tpg.com.au/foxtail/pics/Handcontroller.jpg
http://users.tpg.com.au/foxtail/pics/Internal.jpg