thanks for all comments guy's. MY biggest problem is that I definetly want to keep to a nissan motor and it has to be 1.6L maximum for it to be turbocharged, yes I can do a CA16det and it has been on top of the list for a while but I would much rather put a motor in that I can stroke to get more cubes and that is why the SR16 is a great choice. I am going to run autronic most likely so distributers etc are not that much of a problem and I can run a crank angle sensor if I need to it's just working out how much junk I have to deal with behind the head for the dizzy. I know I could get rid of the variable timing by putting custom cams into it so they are locked at a single setting, this has been done or race cars but they are not to good at low revs but the supercharge may help that problem will need to look into it. the other option I thought of was to put a rb20de neo motor into it and see if I could stroke it and bore it to get the litres and horsepower up but don't know anything about them and assume the motor would be a lot heavier and miles to long. I think I might need to take a holiday soon to New zealand so I can have a good look at the SR16 motors in person to see if it is achievable. Don't care if it's difficult cause then there is more chance of someone copying my project

I also am aware of the sr20 site and have got a lot of information from it. once again thanks for your comments