SI 3.8 fuel sytem revision

Talk about the E-Type Series 1
User avatar

Topic author
Desmo
Posts: 135
Joined: Fri Dec 05, 2014 8:52 pm
Location: Germany
Great Britain

#1 SI 3.8 fuel sytem revision

Post by Desmo » Sat Jan 15, 2022 9:40 am

Hello,

After a very long storage period, I would like to overhaul my FHC as far as necessary and prepare her for road approval. I started with the fuel system, cleaning the well preserved fuel tank and the fuel line system. The carburetors have already been revised. I would like to know, if I can keep the original plastic fuel lines, which come from the carburetors and end at the fuel tank? These lines are not damaged or leaking. My second question is. Which fuel pump should I install that can run without an additional fuel pressure reducer? I prefer a submersible unit and if possible would like to install an original Lucas one, but I think it will be difficult to find one.

Many thanks for your help
John
Last edited by Desmo on Sat Jan 15, 2022 2:51 pm, edited 1 time in total.

Link:
BBcode:
HTML:
Hide post links
Show post links


christopher storey
Posts: 5698
Joined: Sun Mar 09, 2008 3:07 pm
Location: cheshire , england
Great Britain

#2 Re: SI fuel sytem revision

Post by christopher storey » Sat Jan 15, 2022 2:20 pm

The fuel lines are not plastic but are nylon, and unless they are unusable I would not advising changing them. You do not state whether your car is a 3.8 or a 4.2 : if it is a 3.8 then the original pump was a submersible. If it is a 4.2 then it is the standard type SU pump which is readily available ( as are spares ) from Burlen Fuel Systems

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

Topic author
Desmo
Posts: 135
Joined: Fri Dec 05, 2014 8:52 pm
Location: Germany
Great Britain

#3 Re: SI 3.8 fuel sytem revision

Post by Desmo » Sat Jan 15, 2022 2:53 pm

Hello Chistopher,

Thank you for your reply. Yes the car is a 1961 3.8 one.

Best regards
John

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

abowie
Posts: 3879
Joined: Wed Sep 07, 2011 9:15 pm
Location: Australia
Contact:
Australia

#4 Re: SI 3.8 fuel sytem revision

Post by abowie » Sun Jan 16, 2022 1:37 am

The Lucas units do come up on EBay etc from time to time.

I have the SNGB aftermarket unit in both of my 3.8s.

https://www.sngbarratt.com/English/#/UK ... %20pump%60
Andrew.
881824, 1E21538. 889457. 1961 4.3l Mk2. 1975 XJS. 1962 MGB
http://www.projectetype.com/index.php/the-blog.html
Adelaide, Australia

Link:
BBcode:
HTML:
Hide post links
Show post links


christopher storey
Posts: 5698
Joined: Sun Mar 09, 2008 3:07 pm
Location: cheshire , england
Great Britain

#5 Re: SI 3.8 fuel sytem revision

Post by christopher storey » Sun Jan 16, 2022 8:43 am

Amazingly, a submersible pump is advertised for sale in the latest JEC magazine. I shall get the phone no and post it up shortly

EDIT ; THE PHONE NUMBER IS 07899 841453 ( from outside the UK 0044 7899 841453 )

The submersible pump requires no pressure regulator
Last edited by christopher storey on Sun Jan 16, 2022 10:35 am, edited 2 times in total.

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

Topic author
Desmo
Posts: 135
Joined: Fri Dec 05, 2014 8:52 pm
Location: Germany
Great Britain

#6 Re: SI 3.8 fuel sytem revision

Post by Desmo » Sun Jan 16, 2022 10:24 am

Thank you Andrew,

Does the fuel pump run without an additional pressure reducing valve or other changes to the fuel system?

Bets regards
John

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

rswaffie
Posts: 1647
Joined: Sat Jul 19, 2014 7:56 am
Location: Lincolnshire
Great Britain

#7 Re: SI 3.8 fuel sytem revision

Post by rswaffie » Sun Jan 16, 2022 1:39 pm

I’ve also got one of the sng submersible pumps. In fact, I’ve had two as the first worked a too high a pressure so I sent it back. They sent another, advising it was set to the correct pressure, but it still pumped out at over 5psi, causing flooding and overflowing of the carbs. I’ve had to fit a Malpassi fuel regulator to get it to the correct pressure. This was covered in a number of posts on this forum.
Don’t fit one unless you have a fuel pressure gauge to check it is correct and prepare to fit a regulator to be on the safe side.

viewtopic.php?f=2&t=15999&p=133625&hili ... si#p134205
Richard

Previous owner and restorer of a S1 3.8 FHC Opalescent Golden Sand with Tan Trim 889504 (now sold and headed for Athens)

:swerve: :wrench: :hammer: :fingerscrossed:

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

abowie
Posts: 3879
Joined: Wed Sep 07, 2011 9:15 pm
Location: Australia
Contact:
Australia

#8 Re: SI 3.8 fuel sytem revision

Post by abowie » Sun Jan 16, 2022 8:42 pm

Desmo wrote:
Sun Jan 16, 2022 10:24 am
Thank you Andrew,

Does the fuel pump run without an additional pressure reducing valve or other changes to the fuel system?

Bets regards
John
Yes. Unlike Richard I've had no problems.
Andrew.
881824, 1E21538. 889457. 1961 4.3l Mk2. 1975 XJS. 1962 MGB
http://www.projectetype.com/index.php/the-blog.html
Adelaide, Australia

Link:
BBcode:
HTML:
Hide post links
Show post links


Geoff Allam
Posts: 197
Joined: Sat Mar 31, 2018 12:55 am
Canada

#9 Re: SI 3.8 fuel sytem revision

Post by Geoff Allam » Mon Jan 17, 2022 4:10 am

" prefer a submersible unit and if possible would like to install an original Lucas one, but I think it will be difficult to find one. "

My 64 is running fine on the original lucas submerged pump. If you have your original pump for a core you can obtain a rebuilt unit for less than US 400.00 on Ebay from a reputable source in the US.
Geoff Allam
67 series1 ots under restoration

Link:
BBcode:
HTML:
Hide post links
Show post links


tinworm
Posts: 611
Joined: Mon Jan 02, 2012 9:48 am
Location: devon
Great Britain

#10 Re: SI 3.8 fuel sytem revision

Post by tinworm » Mon Jan 17, 2022 6:17 pm

I have two spare original pumps in running order complete with mounting frame and pick up 'pig tail'. Both need a top cover seal as I have not been able to access any . I would sell both for £200
each if anyone wants one. I have another for my 3.8 rebuild. To anyone who does not know - original pumps work very well with few problems (at least to me)

Barrie
1968 E-type roadster, 1964 E-type fixed head 1995 Ferrari 355 1980 Ferrari 308 1987 V8 90 Landrover 1988 Bedford rascal van 1943 Ford GPW

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

Topic author
Desmo
Posts: 135
Joined: Fri Dec 05, 2014 8:52 pm
Location: Germany
Great Britain

#11 Re: SI 3.8 fuel sytem revision

Post by Desmo » Sat Jan 22, 2022 2:44 pm

Hello,

Thank you for your information.

I would like to ask if it is possible to install a nos lucas submersible fuel pump in the fuel tank without further preparation or should the pump be opened and replacing all the seals and gaskets ? Are these seals for the pump housing and the sealing rings inside the pump available somewhere ? Does anyone have photos of a disassembled, later FL2 Lucas pump, showing the internal structure and components ? Myself I have driven a petrol-injected Triumph for many years. Here I was able to install a nos Lucas (not submersible) pump and also nos sealing rings and valves in the PI metering unit without revision. After more than 20 years, these components are working perfectly.

Best regards
John

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

Topic author
Desmo
Posts: 135
Joined: Fri Dec 05, 2014 8:52 pm
Location: Germany
Great Britain

#12 Re: SI 3.8 fuel sytem revision

Post by Desmo » Sat Jan 22, 2022 9:40 pm

Hello,

Here some photos from the original 1961 Lucas fuel pump, which stood in the full petrol tank for more then 42 years.

Best regards
John


[url=https://postimg.cc/tZ5Ft1DL]

[url=https://postimg.cc/RJZKPMDq]

[url=https://postimg.cc/vD0W4V4n]

[url=https://postimg.cc/hJMG29Wb]

Link:
BBcode:
HTML:
Hide post links
Show post links

Post Reply Previous topicNext topic