going to do a DIY water injection system - and need to get a pressure switch - or do i need a vacuum switch as this needs to go on the inline vacuum pipe.... I am confused - I think it is a pressure switch that is required - can anyone confirm this?

For those interested there is a good article in the back of the latest true grip on how to do this.....

Cheers
Nick

 

pressure switch..

David

 

Nick

The article in true grip is about an Intercooler Waterspray System, not a water injection system. Which are you doing? Out of interest, I've got a home-cooked injection system that is giving good results, but currently has too small a resevoir. Once I sort out a suitable resevoir ....

The real answer to your question is that you need a boost switch. In either case you don't want to be wasting water unless you are on-boost or using a manual override (say on the start line of a drag strip before a run).

Duncan

 

Thanks folks - bit of bad terminology there on my part - intercooler water spray is what I meant doh...

Looks like a pressure switch it is then - if i get an adjustable one i can set it up to the relevant psi before it kicks in.

Cheers
Nick

 

this is how i have done mine, got the pressure switch from jamie at JWRACING.