Classic cars forum & vehicle restoration.
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Brewster
Joined: 02 Sep 2022 Posts: 26
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Posted: Thu May 02, 2024 6:51 pm Post subject: GP fuel pumps? |
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I have a serious over-fuelling problem with the Mk2 Humber Sceptre. The Weber 28/36 carb was ultrasonically cleaned and everything seems OK there. But I know nothing about the GP Made in Italy fuel pump apart from it not being original.
I'll be getting a fuel pressure gauge in a couple of days to see what it's up to but does anyone know anything about these carbs? Are they suitable for the Weber-equipped 1725cc? Any idea what sort of pressure they deliver? I've had a good look but there's precious little information about them out there.
Bruce |
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bjacko
Joined: 28 Oct 2013 Posts: 364 Location: Melbourne Australia
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Posted: Fri May 03, 2024 5:58 am Post subject: GP pumps |
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If you Google "GP Italian Fuel Pumps" you may find your answers. _________________ 1938 Morris 8 Ser II Coupe Utility (Pickup)
1985 Rover SD1 VDP |
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alastairq
Joined: 14 Oct 2016 Posts: 1956 Location: East Yorkshire
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Posted: Fri May 03, 2024 9:58 am Post subject: Re: GP fuel pumps? |
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Brewster wrote: | I have a serious over-fuelling problem with the Mk2 Humber Sceptre. The Weber 28/36 carb was ultrasonically cleaned and everything seems OK there. But I know nothing about the GP Made in Italy fuel pump apart from it not being original.
I'll be getting a fuel pressure gauge in a couple of days to see what it's up to but does anyone know anything about these carbs? Are they suitable for the Weber-equipped 1725cc? Any idea what sort of pressure they deliver? I've had a good look but there's precious little information about them out there.
Bruce |
Is your pump an electric pump? Or a mechanical pump attached to the engine block?
A lot of electric pumps are made in Italy'...Indeed, for me, the most famous fuel filters and regulators are made by Malpassi...[Filter King].
Weber carbs, in my limited experience, are sensitive to fuel pressure from the pump.
[As indeed are SU carbs].
Fuel pressure needs to be no more than two or three PSIs.... _________________ Dellow Mk2, 1951 built, reg 1952.
Fiat 126 BIS
Cannon special [1996 registered. Built in 1950's]
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Ford Pop chassis, Ashley 1172 bodyshell, in pieces. |
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Brewster
Joined: 02 Sep 2022 Posts: 26
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Posted: Fri May 03, 2024 3:05 pm Post subject: |
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It?s a mechanical pump which, as I?ve just found out having put the gauge to it, is squirting out at 4psi which shouldn?t be enough to cause the sort of problems I?ve having as far as I know.
I?ve warned that bloody Humber that if it doesn?t start behaving I?m going to go full Basil Fawlty on it. |
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