RRC V8 carb query

peterself · Aug 4, 2025

Hi all - I have recently accquired a 1977 RRC 3.5 running and driving project with original Strombergs and hope someone can help me. I'm quite new to these and am mystified as to what this is and what it should be connected to if anywhere? The lower end comes from the LH carb and the open end does have vacuum when engine running. The ignition advance is connected seperately and works so it isn't that.

Many thanks.....Peter

Henry_b · Aug 5, 2025

Do you have a manual choke?

peterself · Aug 5, 2025

Henry_b said:
Do you have a manual choke?

Thanks for responding yes, manual choke which works fine.

Henry_b · Aug 5, 2025

Hmm I was thinking possibly something to do with an AED where does the vacuum pipe off of the bottom of it go to?

peterself · Aug 5, 2025

Will look tomorrow and try to take a picture - thought I read somewhere about vacuum control of air temperature - ring any bells?

peterself · Aug 5, 2025

Have just Googled further - it’s a fuel trap:

ERC2042L - Genuine Fuel Trap for V8 Carb and Series 3 2.6 Engines and Series 3 2.6 Litre

ERC2042L, genuine fuel trap for v8 carb and series 3 2.6 engines and series 3 2.6 litre for Series 3, Defender 90/110, Range Rover Classic, Land Rover Parts and Range Rover Parts

www.johncraddockltd.co.uk

Also seen in this video:

Will research more tomorrow…

kermit_rr · Aug 6, 2025

Crikey that engine sounds rough.
Fuel trap. Ha! I can see why it's been left out of the fuel circuit, sounds like a nightmare

peterself · Aug 6, 2025

kermit_rr said:
Crikey that engine sounds rough.
Fuel trap. Ha! I can see why it's been left out of the fuel circuit, sounds like a nightmare

Not my vehicle or video - just showing the same device on a similar engine!

kermit_rr · Aug 6, 2025

peterself said:
Not my vehicle or video - just showing the same device on a similar engine!

Yep i thought that was the case. It still sounds like a bag of broken nails!

norseman · Aug 6, 2025

Never come across a 'fuel trap' despite owning four RRC's but then they have all been EFI
I have also owned a late 2.6 LR but that didn't have such a device, so I'm curious as to it's function.

kermit_rr · Aug 6, 2025

norseman said:
Never come across a 'fuel trap' despite owning four RRC's but then they have all been EFI
I have also owned a late 2.6 LR but that didn't have such a device, so I'm curious as to it's function.

Allegedly filters out water and crud. Sounds like it's fixing a problem that doesn't exist.
Yes you get water in petrol but I've never had it cause a problem. And regular filters/sediment bowls do a decent job

peterself · Aug 7, 2025

kermit_rr said:
Allegedly filters out water and crud. Sounds like it's fixing a problem that doesn't exist.
Yes you get water in petrol but I've never had it cause a problem. And regular filters/sediment bowls do a decent job

Right, so if it’s drawing vacuum, then best just to block off the open spigot for now? Maybe tidy it up properly at a later date (!). Always more to learn…

kermit_rr · Aug 7, 2025

peterself said:
Right, so if it’s drawing vacuum, then best just to block off the open spigot for now? Maybe tidy it up properly at a later date (!). Always more to learn…

No clue how it actually works sorry, never seen one. If it were me I'd cut it out of the loop however needs and just have done with it. In my opinion. Probably

RRC V8 carb query

peterself

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ERC2042L - Genuine Fuel Trap for V8 Carb and Series 3 2.6 Engines and Series 3 2.6 Litre

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