Using a Hobs Pressure Switch to Turn on KSB

[cummins12club]

Just purchased me a hops low pressure switch from napa auto parts that I will be installing by Friday my question is how to adjust it to come on at a desired boost level between 15-20psi also does it matter which terminal gets the 12 volts and can I ground it to the negative terminal on the battery? Thanks

[Tacoclaw]

I just tested continuity across the switch and used regulated shop air to test where the setpoint was at. It shouldn't matter which way the power goes through it and you should technically be able to ground anywhere near it that's metallic. As long as your ground straps are maintained between the block, starter, and body any ground would work for a simple switch.

[cummins12club]

Good good, so how do u adjust the pressure at which the switch turns on?

[AHineman]

Pop the rubber cap off the end and there is an Allen head. In raises the pressure it takes to make the switch, out lowers it

[cummins12club]

Good deal thanks!

[cummins12club]

Good deal thanks!