[Healeys] Fuel pump's psi & 3/8" unf k-nuts.

[Bob Spidell]

AFAIK, all the 'single-ended' pumps put out 3psi give-or-take. Don't know why 'double-ended' pumps would be any different--greater pressure would probably overwhelm the float valves. 

I believe the pressure is determined (mostly) by the strength of the springs that push the diaphragm (although the earlier pumps--for BN1/2s--may have an internal bypass hole that serves as a rudimentary regulator). I've only ever seen one type of spring. 

Bob 

----- Original Message -----



I have an AZX1500 pump in my MkII BT7. (Double ended SU). This is basically 
2 AUF 301 mated together. Although one can run both at once, it's not 
usually necessary and one might say that one half is a reserve for the 
other. I have mine independently switched.....either, both or none depending 
on the switches. 

So, finally to the point..... 

I'm in the slow throes of fitting 3 Weber 45 dcoe 9s. I've got them in and 
running. One of them drips a little fuel which I'd put down to it needing 
any one of a zillion adjustments. I was speaking to Webcon, here in UK, 
about something else and I mentioned the drip. The guy said that Webers only 
require +/- 3psi and that my pump was probably putting out more like 5psi 
per side. Any ideas? 



And does anyone know where I can get more of those wretched little 3/8" unf 
"k-nuts"? I'll be taking my Webers out at some stage and I suspect that 
these things can only be used once. Or am I wrong? 



Thanks, 

Simon. 
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