Can someone tell me which pressure bulb can be used for the IC's automatic water spray system?
And what a value. I was thinking of something of 0.9 BAR is fine or what is usually used?
I was thinking of an oil pressure bulb from a range of 0.9 BAR from VW which is normal open. and work with a power relay so that it does not work under load and is damaged.

 

I made a home made Intercooler spray by using an adjustable pressure switch I got off eBay ..
you could adjust it to any pressure you wanted using a vacuum tester..
I'd take a photo but it's in my toolbox and I'm on furlough....