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Fuel Pressure

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Fuel Pressure #1 This topic is about my 1967 Austin-Healey 3000 BJ8
SteveT3000 Steve Townsend Forest of Dean, Gloucestershire, UK Sign in to contact 1948 MG TC 1957 MG MGA "Mavis" 1967 Austin-Healey 3000 BJ8 2019 Morgan Plus 4 (+4)	Topic Creator (OP) Mar 6, 2017 04:53 AM Joined 9 years ago 80 Posts

Hi, I recently fitted a Malpassi fuel filter/regulator to my BJ8. It's set at 3 psi pressure, is that about right? A couple of TR guys have said that's too high.

It runs ok, no starvation or float flooding etc but it would be good to know what the recommended setting is. I'm still on SU carbs.

Many thanks.

Steve

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Re: Fuel Pressure #2
603000 Daniel S Addison, IL, USA Sign in to contact 1960 Austin-Healey 3000 BT7 1967 Austin-Healey 3000 BJ8	Mar 6, 2017 11:38 AM Joined 10 years ago 120 Posts

3 psi is o.k. ... SU s do NOT like more than 3 lbs.

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Re: Fuel Pressure #3
RAC68 Raymond Carbone NJ, Jersey Shore, USA Sign in to contact	Mar 7, 2017 06:01 PM Joined 14 years ago 1,139 Posts

Hi Steve,

I agree with Daniel's statement that 3 PSI is OK. The issue is ... will the pressure overwhelm the Jet causing gas to uncontrollably leak from the carburetor. If this is not a problem, you are golden. If gas begins to leak from the bowel out the overflow, you sett the pump a little lower. However, if everything is working properly, I don't expect you will have a problem.

Ray(64BJ8P1)

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Re: Fuel Pressure #4
Chris-D Chris D Sydney, NSW, Australia Sign in to contact	Mar 8, 2017 09:39 AM Joined 9 years ago 137 Posts

Hi,
I've had a malpassi for over 20 years, they are great.
You can go to 3.5 or 4, if you need more fuel volume. Over 4 you can have issues, very risky at 5.
Check the volume of fuel you are getting at 3.
See http://www.myaustinhealey.com/austin_healey_technical_articles.html
Best
Chris

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