[Healeys] Why carry spares

[BJ8Healeys]

Two pumps in series might not be suitable for a racing Healey, but they have
worked just fine on my street BJ8 without any problems for a long time.
It's just simpler to plumb them in series than in parallel, in my opinion.
If you have two pumps in parallel with separate switches, then you can run
both pumps at the same time and get twice the flow rate at the same output
pressure.    Running two pumps in series at the same time will provide the
same flow at double the output pressure - not good for the carbs.  So, for
pumps in series there  should be only one switch to prevent running both
pumps at the same time.

 

Steve Byers

HBJ8L/36666

BJ8 Registry

AHCA Delegate at Large

Havelock, NC USA

 

From: richard mayor [mailto:mayorrichard at hotmail.com] 
Sent: Tuesday, March 18, 2014 10:14 PM
To: Mitch; BJ8Healeys
Cc: healeys
Subject: RE: [Healeys] Why carry spares

 

On my Healey racecar I ran two SU pumps in parallel with two switches.
Never had a failure.  I would alternate the pumps from time to time so I
knew they were both working.   It seems to me that plumbing them in series
puts needless restriction in the flow.

Richard Mayor