SU diaphragm type petrol pump

Big lumps of metals and spanners. Including servicing and fluids.

Moderators: User administrators, Moderators

Post Reply
simonmarsh
Registered user
Posts: 77
Joined: 30 Jun 2020, 09:50
80-90 Mem No: 15712
Location: Near Bristol

SU diaphragm type petrol pump

Post by simonmarsh »

Has anyone tried using an SU diaphragm type electric petrol pump? I read in practical classics recently that they are quieter than most and only pump petrol when required rather than constantly. I currently have a pertronix(?) type which works well but is very noisy despite being mounted using rubber washers between it and the chassis
1980 2 litre CU petrol engine 4 speed gearbox (Devon Moonraker)
1973 1303S Beetle
1965 Karmann Ghia coupe

davidoft1
Trader
Posts: 3085
Joined: 27 May 2009, 18:56
80-90 Mem No: 16628
Location: hayling island

Re: SU diaphragm type petrol pump

Post by davidoft1 »

They’re standard fitment on lots of cars, pretty reliable and low pressure for use with carbs , they are fairly quiet

simonmarsh
Registered user
Posts: 77
Joined: 30 Jun 2020, 09:50
80-90 Mem No: 15712
Location: Near Bristol

Re: SU diaphragm type petrol pump

Post by simonmarsh »

Thanks very much
1980 2 litre CU petrol engine 4 speed gearbox (Devon Moonraker)
1973 1303S Beetle
1965 Karmann Ghia coupe

silverbullet
Trader
Posts: 17705
Joined: 08 Jun 2009, 09:51
80-90 Mem No: 6908
Location: Surrey Syncronaut #156
Contact:

Re: SU diaphragm type petrol pump

Post by silverbullet »

They usually respond well to a hammer if the trembler contacts get dirty...but since a carb wbx engine has a perfectly good mechanical pump integrated into the design, why reinvent the wheel?
1985 Oettinger 3.2 wbx-6 Caravelle RHD syncro twin slider. SA Microbus bumpers, duplex winch system, ARC 7X15 alloys,
"Schrödinger's syncro"
Syncronaut #156

simonmarsh
Registered user
Posts: 77
Joined: 30 Jun 2020, 09:50
80-90 Mem No: 15712
Location: Near Bristol

Re: SU diaphragm type petrol pump

Post by simonmarsh »

I wouldn’t normally but 1980 is air-cooled and was running on an electric pump when we got it
Thanks for the reply though
1980 2 litre CU petrol engine 4 speed gearbox (Devon Moonraker)
1973 1303S Beetle
1965 Karmann Ghia coupe

Post Reply