is there a good known setting for the locost chassis/ im using it for sprints and want to check what it is set at.

The problem with a locost is that unless you have used adjustable wishbones, all settings on the car are a compromise, so what works for one car, may not suit another. Mine is not a locost, but I have set the suspension using a 4 wheel tracking system that I bought on ebay.
Most cars require 4-6 degrees of caster, 1/4-1/2 degree negative camber and 1/2 - 1 degree of toe in on the front.
1/4- 1/2 degree on the rears would be helpful.
There are other settings that effect handling, like kingpin inclination and setback.
If you are serious about a good track set up, I would recommend making your wishbones as adjustable as possible by using rod end bearings and packing washers/shims.

the setup is really for my roadcar which i spring, i am building an avon which will be fully adjustable.

thanks for your input it gives me a kind of base setting.

john