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

[David Nock BCS]

The double SU fuel pump was used on the Rolls Royce, and Jaguar V12 and I 
assume several other cars. These cars all required 3 psi fuel pressure but 
needed more volume of fuel. So you can use the double SU pump a couple of 
ways. One if you are running the Webers and need the extra volume of fuel. 
Or if you want a spare pump permanently installed in the car. You could have 
a switch installed on the car to switch between the pumps.





David Nock
British Car Specialists
Stockton Ca 209 948 8767
www.britishcarspecialists.com
-----Original Message----- 
From: Derek Job
Sent: Thursday, February 13, 2014 8:41 AM
To: Simon Lachlan
Cc: healeys at autox.team.net
Subject: Re: [Healeys] Fuel pump's psi & 3/8" unf k-nuts.

Simon I have triple Webers on my car. I have a fuel regulator and run at 
3psi.
Sometimes I try it at 3.5 and I can't say I've noticed much difference but 3
is a number that gets thrown around. They don't need high pressure but they 
do
need flow. I had to upgrade my Facet fuel pump to the Red Top because when I
really floored the throttle the car would die as it wasn't get enough fuel.
Luckily I discovered that at our pre season track day and not during an 
event.

I had my Webers set up on a rolling road without the air filters. If i floor
the throttle with the filters on I get some hesitation nearer the top end.
Worth taking into consideration when you have them properly set up.

Derek
On 13 Feb 2014, at 14:39, "Simon Lachlan" <simon.lachlan at homecall.co.uk>
wrote:

> 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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