I want to test the CO level using a Gunsons exaust gas monitor. Does anyone know what figure it should be for a 2 litre Pinto running twin 45 webers.

(I know these machines are not 100% accurate, but it will give me a good indication before I go for the MOT)

I also do not have the instructions for this unit. Does anyone have a copy they could email me?

http://www.tiz.st/miniblog/Gunson%20Gas%20Tester%20Mk2.pdf

this any good?

3.5co is a pass 1200 hc
mine is set at 3.0co