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Ray White
Joined: 02 Dec 2014
Posts: 7141
Location: Derby
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 Posted: Fri Jul 19, 2024 8:01 pm Post subject: Question about fuel line |
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https://www.carandclassic.com/auctions/1952-bentley-mk-vi-big-bore-8qd5X4
In photos 176 to 181 there is additional copper tubing from the top of the float chamber entry on both carburettors.
Could someone advise me what they think this is for please?
(This Mark 6 Bentley will be coming up for auction soon. Knowing the car's recent history I doubt it will meet it's reserve.) |
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bjacko
Joined: 28 Oct 2013
Posts: 527
Location: Melbourne Australia
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| Posted: Sat Jul 20, 2024 6:14 am Post subject: Bentley Carbys |
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Maybe they are overflow pipes similar to some SU carbys?
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1985 Rover SD1 VDP |
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Ray White
Joined: 02 Dec 2014
Posts: 7141
Location: Derby
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| Posted: Sat Jul 20, 2024 8:44 am Post subject: Re: Bentley Carbys |
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| bjacko wrote: | | Maybe they are overflow pipes similar to some SU carbys? |
I suppose if the carbs overflow, then these pipes take away the surplus so it can't be smelt in the car? |
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Penman
Joined: 23 Nov 2007
Posts: 4866
Location: Swindon, Wilts.
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| Posted: Sat Jul 20, 2024 10:35 am Post subject: |
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Could they be a return to tank system?
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alastairq
Joined: 14 Oct 2016
Posts: 2121
Location: East Yorkshire
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| Posted: Sat Jul 20, 2024 12:12 pm Post subject: |
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I think Penman has the answer.
An attempt to overcome common issues with today's modern petrol.
Further evidence being the small bore piping? Smaller than the input fuel line, at any rate.
The pump would be working continuously, supplying cooler fuel as each carb demands.
I first saw this back in the 1980's when I purchased Nissan Cherry [similar type in appearance to the Alfa Arna]...It wasn't new at the time....and the dash lighting system fritt the 'ell out of me first nighttime drive, but....
It had a fuel flow & return piping system.
No doubt as the model was considered as a 'World' car rather than specific to the weird British market, so had to work reliably in the middle of the African bush as it did in Rotherham.
Even though back then we didn't have the same ingredients in our cheap petrol as we do today.
I note from Youtube channelers from the USA, this system is often used these days to allow old bangers/ cars to function well on modern petrol.
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Ray White
Joined: 02 Dec 2014
Posts: 7141
Location: Derby
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| Posted: Sat Jul 20, 2024 2:08 pm Post subject: |
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Yes, these cars were exported all over the World.
Indeed anywhere to people with deep enough pockets!
I expect and believe that these overflow pipes were a later addition but when it was done I would need to investigate. The car has spent a lot of time touring abroad, including at high altitude, so perhaps it was done then?
Some good suggestions from you guys - so, thank you.  |
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Ray White
Joined: 02 Dec 2014
Posts: 7141
Location: Derby
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| Posted: Mon Jul 29, 2024 8:25 pm Post subject: |
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AS I expected, this exceptional Mark V1 failed to reach it's reserve. Having been sold to a dealer in 2021 for 45K I was not entirely surprised.
At todays auction it was bid to 39K .
I would have stopped at 37K. |
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Vintage Fly Guy
Joined: 27 Jun 2024
Posts: 179
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| Posted: Tue Jul 30, 2024 11:51 am Post subject: |
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| I was parked next to a 1952 MkV1 Bentley (a 4.25 version) at the Cholmondeley Arms Car Club meet last Sunday, and a lovely car it was too. |
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Ray White
Joined: 02 Dec 2014
Posts: 7141
Location: Derby
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| Posted: Tue Jul 30, 2024 3:38 pm Post subject: |
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| Vintage Fly Guy wrote: | | I was parked next to a 1952 MkV1 Bentley (a 4.25 version) at the Cholmondeley Arms Car Club meet last Sunday, and a lovely car it was too. |
I have to agree. I am drawn to the Mark 6 with it's small boot in either engine capacity; not least because at 16 feet they are just the right size for my garage. (The later but very similar R type is too long!)
Interestingly, the early cars had no chrome side trim or fold down tables in the back of the seats. They also started production without wheel spats and other minor details but the biggest improvement in later cars was a full flow oil system and twin exhausts.
I have recently studied these cars in some detail and think I have come to know what to look out for. Some have had vast sums lavished on them over the years but as is a common story these days they fail to sell for a fraction of that expenditure.
The ones to be careful of, however, are those which have fallen victim to back street bodgers who can easily disguise a dog.
Once bitten...and as we often hear said ... "caveat emptor". |
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Ray White
Joined: 02 Dec 2014
Posts: 7141
Location: Derby
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| Posted: Tue Jul 30, 2024 10:15 pm Post subject: |
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The Mark V1 is now on the C&C site for 42K.
The dealer is presumably trying to limit his loss...  |
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