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Re: Fuel Tank size [Re: +8Rich] #741728
12/05/22 06:16 PM
12/05/22 06:16 PM
Joined: Nov 2015
Posts: 5,105
Northern Capital of Cool
CooperMan Offline
Just barreling along
CooperMan  Offline
Just barreling along
Charter Member

Joined: Nov 2015
Posts: 5,105
Northern Capital of Cool
Originally Posted by +8Rich
If he has one Jon... Plus Four..

Cue thread drift 'to spare or not to spare' laugh2


Jon M
Re: Fuel Tank size [Re: Sir Percival] #741731
12/05/22 06:38 PM
12/05/22 06:38 PM
Joined: Aug 2010
Posts: 45
Shrewsbury
p8mog Offline
Just Getting Started
p8mog  Offline
Just Getting Started

Joined: Aug 2010
Posts: 45
Shrewsbury
I do about 300 miles poodling along, but if I’m on the motorway and enjoying my self in the Plus Four, I look for petrol at 250 miles.


Heron Grey Plus Four 2021

Previous:-
Connaught Green 4/4 1988
Black Plus 8 1998
Re: Fuel Tank size [Re: Sir Percival] #741734
12/05/22 07:03 PM
12/05/22 07:03 PM
Joined: Jul 2007
Posts: 22,628
Suffolk
John V6 Offline
Brooklands Register contact
John V6  Offline
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Joined: Jul 2007
Posts: 22,628
Suffolk
I know if patient I can 4l plus by filling v slowly


JohnV6
2014 Brooklands Edition Roadster "Brookland's Belle" #5 of 50
Re: Fuel Tank size [Re: Sir Percival] #741743
12/05/22 08:26 PM
12/05/22 08:26 PM
Joined: Dec 2020
Posts: 132
Belgium
MATTMOG Online content
L - Learner Plates On
MATTMOG  Online Content
L - Learner Plates On

Joined: Dec 2020
Posts: 132
Belgium
Well; coincidentally I had a problem with the fuel gauge in two-ton the past few weeks.
Always indicated completely full. He did that sometimes in the past, but after a while or a refill everything went back to normal.
But not anymore, Research was needed.
I found in this great forum that the cause could be the tank sensor and how to clean it.
The spare wheel and everything else off.
Disconnected the cables to the sender and the gauge gave zero.
Then the resistance measured on the sender, which gave 38 ohms which according to Bunny's data is about half full.
But how much is in the tank now?
It's pretty simple to figure that out on an old Morgan. No valve in the filler opening.
I took a cord with a thick nut on it and lower it to the bottom.
I could see that the tank was indeed half full. So the sender is ok.
The contacts of the sender and cables cleaned and reattached and everything worked as usual.
Refueled up to three quarters with the gauge on, and double check with the cord,everything fine.
Did 120 Km today and everything is back to normal.
Apparently it was just a bad contact. But to measure is to know as we say in Flemish.

What would we be doing all day without a Morgan!?!? innocent


Paul

1990 4/4 1.6 Ford CVH
2014 +4 2.0 Ford
2005 BMW Z4 2.2 6Cyl
Re: Fuel Tank size [Re: Sir Percival] #741750
12/05/22 09:43 PM
12/05/22 09:43 PM
Joined: Apr 2013
Posts: 95
Northants
JJR Offline
Just Getting Started
JJR  Offline
Just Getting Started

Joined: Apr 2013
Posts: 95
Northants
This thread seems to have drifted off the original topic which is how much fuel does the tank in the CX Plus Four hold. What the size of tank or MPG of a Plus 8 or Roadster may be is entirely irrelevant save for being further examples of how inaccurate fuel tank/mileage readings are in Morgans. This is a good question which one would imagine would be simple to answer. Sadly that is not the case. I will have to look back through some of my earlier posts on this subject but I seem to remember that the useable capacity of the tank is about eight litres less than the nominal size of the tank. In other words there are about eight litres of fuel in the tank that the fuel pickup cannot access. Depending upon how I drive I get between 30mpg and 50mpg so an average of 40 mpg. I fill up when I am approaching 200 miles on the odometer and would advise any other Plus Four user to do the same.


John R Marchant
Plus Four JT10MOG "Florence"
Re: Fuel Tank size [Re: SimonH] #741764
13/05/22 07:37 AM
13/05/22 07:37 AM
Joined: Feb 2016
Posts: 5,105
East Harling, Norfolk UK
RichardV6 Online NoMood
Charter Member
RichardV6  Online NoMood
Charter Member

Joined: Feb 2016
Posts: 5,105
East Harling, Norfolk UK
Originally Posted by SimonH
Morgan fuel gages are at best vague....

Ive measured a +4 tank at 43 Litres...

But not all! Have taken my Roadster down to "10 miles to Empty" with gauge just showing empty. It took nearly 50 litres. Close enough to spot on for a 52 litre tank.

As I've suggested before probably a Friday afternoon job innocent


Richard

2018 Roadster - Red/Magnolia - "Morton"
1966 Land Rover series 2a SWB
1945 Moto Guzzi Airone
Re: Fuel Tank size [Re: RichardV6] #741773
13/05/22 08:38 AM
13/05/22 08:38 AM
Joined: Feb 2010
Posts: 1,369
SimonH Online content
Has a lot to Say!
SimonH  Online Content
Has a lot to Say!

Joined: Feb 2010
Posts: 1,369
Originally Posted by RichardV6
Originally Posted by SimonH
Morgan fuel gages are at best vague....

Ive measured a +4 tank at 43 Litres...

But not all! Have taken my Roadster down to "10 miles to Empty" with gauge just showing empty. It took nearly 50 litres. Close enough to spot on for a 52 litre tank.

As I've suggested before probably a Friday afternoon job innocent


There are over 50 variations of trad Morgan fuel tank…

But I have measured a CX PLUS 4 tank at 43 ltrs…
The factory wanted me to make larger ones for the race cars


Simon @ Sifab.co.uk

Sifabtemporary@gmail.com
Re: Fuel Tank size [Re: Sir Percival] #741788
13/05/22 11:31 AM
13/05/22 11:31 AM
Joined: Dec 2011
Posts: 412
tervuren belgium
T
thierry242 Offline
Learner Plates Off!
thierry242  Offline
Learner Plates Off!
T

Joined: Dec 2011
Posts: 412
tervuren belgium
28 litres for 405 km. orange light was on

Re: Fuel Tank size [Re: Sir Percival] #741803
13/05/22 03:04 PM
13/05/22 03:04 PM
Joined: Jan 2010
Posts: 1,312
Lampeter, Wales
Jon G4LJW Offline
Has a lot to Say!
Jon G4LJW  Offline
Has a lot to Say!

Joined: Jan 2010
Posts: 1,312
Lampeter, Wales
43 litres is over 9 gallons, which should last 360 miles at 40mpg. So you could wait for 300 miles before filling up.

Re: Fuel Tank size [Re: Jon G4LJW] #741822
13/05/22 04:43 PM
13/05/22 04:43 PM
Joined: Apr 2012
Posts: 94
God's own county
Sir Percival Offline OP
Just Getting Started
Sir Percival  Offline OP
Just Getting Started

Joined: Apr 2012
Posts: 94
God's own county
Originally Posted by Jon G4LJW
43 litres is over 9 gallons, which should last 360 miles at 40mpg. So you could wait for 300 miles before filling up.


Thats the big IF though Jon.
If there is in fact 43 litres in the tank and all those litres are accessible!

The reason I asked this question was because of a pending trip around Europe, it makes a big difference if you know you have 300 miles in the tank instead of 200 on a long journey.

Sir P

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