At 10:35 PM 8/10/2004 -0700, you wrote:

 

 

Subject: [FlyRotary] Re: returnless fuel system

 

Al, I know that my fuel pressure sensor was originally specified for oil and they said to just use it for fuel.  I would imagine that there is not much difference between oil and fuel as far as diaphragm tolerance.

That s kind of what I figured also.  But I seem to recall that in the descriptive for an oil pressure switch I was looking at it said not for use with fuel , which got me wondering. I m not so concerned about a malfunction because it can be checked every run-up by turning off the primary pump, but I don t want a potential leak.

 

http://www.bandc.biz/S8012.html

 

I had looked at this; but it is N.O. and closes with pressure, and I want the opposite, and don t know at what pressure it switches. I think I had a lead on one at the local speed shop that was N.C. and opened below 16 psi.  Also specified for oil.

 

Also, check out this great selection of fittings I just found.  I wish I had them long ago, would have made my sensor installation easier.

 

http://www.livermoreperformance.com/XRP_Adapters.html#Special

 

What a great site for fittings!  Especially now that all our plumbing is completedJ

 

Al

Al,
I used the B&C pressure switch you referenced.  It is actually two switches in one.   One terminal is N.O. then closes when oil pressure rises; and a second terminal that is N.C. and then opens when pressure rises.  The purpose is to serve as an oil pressure warning light, and also as a trigger to the Hobbs meter... all in one switch.  Works as advertised, but I never thought of using it for fuel pressure. 

Mark S.