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Author Topic: Fuel pressure and flow rate  (Read 958 times)
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BlueKSO
Member
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Posts: 27


« on: 27 March, 2018, 02:46:42 PM »

Re: 1963 Flavia Coupe ( originally 1500cc but now 1800cc )

Hi folks,

Just wondered if anyone knows the delivery pressure of the boot mounted fuel pump and the subsequent flow rate, ltrs / hr  to the Filter King pressure filter in the engine compartment.

This query has nothing to do with the increase in cc as this was carried out some time ago and the engine runs well as it is.

Cheers,  Peter

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lancialulu
Press Officer
Permanent resident
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Posts: 3908



« Reply #1 on: 27 March, 2018, 04:19:13 PM »

measure after the filterking. pressure should c around 3psi for carb without return. Too much and the needle valve will rapidly wear out and lead to flooding running rich etc.... If you have 3psi I think there will be enough fuel delivery - check at various throttle settings. I did some experiments a while back on a Fulvia and could not detect any loss of performance on normal running around even when then pressure was turned down to 1 psi.
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Its not the winning but taking part! or is it taking apart?
1955 Aurelia B12
1967 Flavia Vignale iniezione
1967 Fulvia 1.3HFR
1972 Fulvia 1600HF
1972 Fulvia 1600HF
1972 1600 Fulvia Sport
1979 2500 Gamma Coupe
1988 Delta 1.6GTi
1998 Zeta
brian
Megaposter
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Posts: 220


« Reply #2 on: 28 March, 2018, 12:17:32 PM »

Eureka moment!
My Sport has suffered with a bit of rough idling and troubles starting when hot. I read this thread and wondered if it could be related and what my pump delivered. Pump has a part number so I checked on-line with the manufacturer and it delivers 6-8psi. I have spoken to them and they have a Bosch pump rated 3-3.5psi which they have on offer at £9.90 delivered. Must be worth a shot. Failing this, there is a pressure control valve at £56 which can do pressures down to 1psi. Watch this space............
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Brian Hands


1922 Hands Tourer
1934 Augusta standard saloon
1938 Aprilia S1 saloon
1953 Aurelia B10
1965 Flavia Sport
DavidLaver
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Posts: 4113



« Reply #3 on: 28 March, 2018, 01:32:32 PM »


Brian - maybe also check the float valve(s)?
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David Laver, Lewisham.
brian
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Posts: 220


« Reply #4 on: 28 March, 2018, 05:11:22 PM »

David - Good idea. Thanks for prompt.
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Brian Hands


1922 Hands Tourer
1934 Augusta standard saloon
1938 Aprilia S1 saloon
1953 Aurelia B10
1965 Flavia Sport
BlueKSO
Member
***
Posts: 27


« Reply #5 on: 31 March, 2018, 07:39:34 PM »

Hi All,

Just to clarify my initial posting.  Iím looking to buy a new fuel pump and I just need to make sure that the pumps that Iím considering, with quoted delivery pressures and flow rates, match the original specifications.
The Filter King can take care of the delivery to the carbs.

Cheers,  Peter
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rogerelias
Rebel Poster
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Posts: 945


MY 1600HF IN HEARTBEAT GARAGE


« Reply #6 on: 01 April, 2018, 09:59:46 PM »

Hi, if it helps i am running a facet road going pump through a filter king on my Fulvia HF, and set the fuel pressure to manufacturers spec, and it works fine.
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FULVIA 1600HF LUSSO
1958 VELOCETTE MAC
Triumph Bonneville t120v 1972
1968 MGC ROADSTER
1958 Series 2 Appia berlina
BlueKSO
Member
***
Posts: 27


« Reply #7 on: 02 April, 2018, 01:23:27 PM »

Many thanks all, think I know which direction Iím going in.

Cheers,  Peter
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