03-07-2019, 07:37 PM
(This post was last modified: 03-07-2019, 07:39 PM by David Stepney.)
There are two types of SU pump. One type has a 'short suck' and 'long blow' and is fitted adjacent to the petrol tank They were used on cars like the Jaguar XJ6, MGB etc.
The other sort has a 'long suck' and 'short blow' and were fitted to the bulkhead, as in the Morris Minor.
I am going back a long way and my memory isn't what it once was, but I seem to recall that the AUA series pumps were the 'long suck, short blow' type and the AUF series were the 'short suck long blow' sort. It might be worth checking which sort you have fitted.
I don't think they are adjustable. The delivery pressure was set at the factory and was governed (it memory serves me aright) by the springs under the valves.
The other sort has a 'long suck' and 'short blow' and were fitted to the bulkhead, as in the Morris Minor.
I am going back a long way and my memory isn't what it once was, but I seem to recall that the AUA series pumps were the 'long suck, short blow' type and the AUF series were the 'short suck long blow' sort. It might be worth checking which sort you have fitted.
I don't think they are adjustable. The delivery pressure was set at the factory and was governed (it memory serves me aright) by the springs under the valves.