Hello, I decided to put some turbo in my Ka (it seems to be nice plan for cold winter days).
I actually have nice options how to uprate the mainfold with welding etc. so this part is no problem. Same to tubing etc.

Problems is which turbo will be best? GT15 looks like too hard on backpressure, where GT25 or GT22 can be considered too big for low boost setup. Yet less restrictive to exhaust.
Which MAF/MAP (not sure now)? Some ppl used stock one and it worked somehow?
Which ECU? Can we remap original ECU (or reset it and let it learn something about new setup), or can I put Sierra Cosworth ECU inside (managed to run easily 3.0 Orion V6 even, very adjustable thing..) or should I go for something totaly other (but expensive) like megasquirt?
Does 7psi setup really need retarding (going just up to 5000 revs for street use)
Is original pump good enough, same to injector and pressure valve? I read just warning about pressure limits (5 bar is limit of rubber joint btw pipes and pump near tank, this can be enforced easily to stand more pressure).
I read lot of articles around but I'd happy to use something tested or get hand on well tested ECU maps etc.
If anybody can help please.

copy of this is also on http://www.talkford.com/topic/186736...1#entry1798109