Ferrari Mailing List: No Ferrari content - hobbs switch

[James V. Cunningham (vikelj]

I just put water injection on my supercharged Porsche 911.  I have a 
hobbs pressure switch which activates the water injection at 4 psi of 
boost.  Since I only make about 6 lbs of boost, I would like to 
reduce the pressure required to have the hobbs switch engage.  I know 
that I am supposed to turn the adjustment counter clockwise but by 
how much.  Do you turn the adjustment a full turn for each psi or do 
you turn it less and by how much.  Any help would be appreciated.
Jim

James V. Cunningham, Esq.
410-625-7400
http://home.comcast.net/~vikelj/page3.html