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SU pump outlet

Posted: Wed Mar 27, 2013 12:21 pm
by blues2rock
Hello, this is my first post so apologies if it's in the wrong place.
Can anyone tell me where I can obtain a 90 degree elbow for the fuel pump outlet for the SU fuel pump on my 1098?
Thanks
Martin.

Re: SU pump outlet

Posted: Wed Mar 27, 2013 12:45 pm
by mogbob
Martin
I'm not quite clear as to what you mean by " 90 degree elbow" for the pump outlet.
The outlet Part No AUA 1422 is "straight " for a Morris Minor pump but it does exit at 90 degrees to the pump body.
You can see an exploded diagram for an SU LP ( low pressure ) fuel pump on the http://www.burlen.co.uk website.
Hope this helps.No connection with Burlen just a satisfied customer, for a number of years.
Bob

Re: SU pump outlet

Posted: Wed Mar 27, 2013 2:41 pm
by blues2rock
Thanks mogbob, can't understand why their site didn't show on google search. I want to replace the existing 'straight up' connection with a 90 degree one to avoid the exaggerated arc in the fuel hose which many Minors have.
Thanks again.

Re: SU pump outlet

Posted: Wed Mar 27, 2013 3:56 pm
by mike.perry
Is this what you are looking for?[frame]Image[/frame]

Re: SU pump outlet

Posted: Wed Mar 27, 2013 5:15 pm
by mogbob
Now we've got the idea....try http://www.holden.co.uk
Part No 015.231 Elbow kit for LP fuel pumps, may be with Part no 015.230 ?
I'd give them a ring, to chat the problem through, probably had the request before ?
The combinations seem to cope with most SU Fuel pump types.
As before, no connection, etc, etc.
Bob

Re: SU pump outlet

Posted: Wed Mar 27, 2013 5:44 pm
by blues2rock
Thanks for fast replies, much obliged.

Re: SU pump outlet

Posted: Wed Mar 27, 2013 10:16 pm
by bmcecosse
Millions of Minors ran (and still run) perfectly well on the straight connector - now you want a bent one.... :roll: :lol:

Re: SU pump outlet

Posted: Thu Mar 28, 2013 10:11 am
by blues2rock
Thank you bmcecosse for your most helpful input, no doubt many other users of this forum will be as impressed as I am by your insight.

Re: SU pump outlet

Posted: Thu Mar 28, 2013 3:33 pm
by les
I daresay he meant it jokingly-----I hope so, as I've used a elbow fitting for years! :o

Re: SU pump outlet

Posted: Thu Mar 28, 2013 4:37 pm
by moggiethouable
Well I must say I am a little disappointed, that at this point nobody began a discussion on the pressure drop created by the fitment of a 90 degree elbow in the fuel line,causing of course untold stresses on the pump as it strains against the increased resistance by said,resulting in shortened life of component parts and fuel starvation resulting in power drop.
Swept pipework not being a mere coincedence, but an intrinsic part of good flow design. :D
Happy easter chaps and chappesses.

Re: SU pump outlet

Posted: Thu Mar 28, 2013 5:14 pm
by mobylette
You seem to have overlooked the "swirl" effect the elbow will cause, no doubt leading to better fuel atomisation, and increased power!

Re: SU pump outlet

Posted: Thu Mar 28, 2013 6:16 pm
by mike.perry
I must check my box of spare pumps to see if I have a spare elbow, but then I will need a screw fit fuel line.

Re: SU pump outlet

Posted: Thu Mar 28, 2013 7:23 pm
by JOWETTJAVELIN
The only case which moggiethouable has, in my mind at least, is on cold start up when the float bowl is empty and petrol is being pumped at a fast rate. The rest of the time, when the float bowl is full, the fuel pump merely ticks over now and again to maintain this level. The associated pipework is full with fuel so a 90 degree bend is irrelevant and arguably beneficial to avoid a kinked hose, which would reduce flow.

Re: SU pump outlet

Posted: Thu Mar 28, 2013 10:20 pm
by bmcecosse
When you have a serious question to ask 'blues' - i will give you a serious answer... Frivolous questions get frivolous answers.... :o