how safe it this switch. on 5117 and how could i make this kit safer.

 

You could run a window switch to ensure its only activated at proper RPMs. You could also click on the Speedshop.Org banner on the right >>>> and check out there O2 shutoff switch. Essentially this will only allow you to spray if the AF ratio falss within a "normal" range. Pretty neat. The super expensive Venom kit has that feature.

 

Does this O2 cutoff switch work quick enough. I mean, will is shut off the spray b4 damage is done?