Will run stock K03sport, not looking for lot of power @ gazillion rpms since I cant use it anyways, its hard to put all that power to the ground especially when running on ice and snow with street studs. That “little thing” will be good enough, probably reliable and cheap to replace if something goes wrong. I will get a proper plate diff, and shorter final drive probably 4.2:1, maybe downpipe, high flow cat and straight pipe to the back - 2.5 - 2,75 ? That is going to be huge difference over the stock 1.8 8v with open diff I run for past two seasons.
What numbers can I expect from this setup ?Lag is major concern when sizing turbo for rally car, and almost all of the cars run anti-lag. On twisty roads with 20-40 meters between corners WRX running stock turbo and electronics can be outrun by impreza RS running 2.5 N/A.
2WD turbo cars are not restricted since the lack of traction on gravel and snow acts like a restrictor. AWD cars for example have to run 34 mm turbo restrictor that limits the top end horsepower, they still produce lots of torque – and torque is what wins races.
“Real rally” turbos have very small turbine housings and large compressor housing so they can produce boost down low, like 25psi at 2700 rpm and keep it in relatively wide range of rpms,
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