What did you do to your Marina today?

[MarinaCoupe]

Paul, a traditional SU MGB electric fuel pump mounted at the rear will do the same job. They are pressure/load sensitive so that if the carbs are boiling off fuel they carry on supplying fuel, when the float chamber(s) are full the pressure builds up and the pump stops to avoid over fuelling. When a car with a mechanical pump experiences fuel evaporation, the float chamber empties and the engine dies away, which makes the mech unit pump less which increases the problem.

Although not fitted on Marinas except Canadian ones, most BL cars of the 1960 and 70s used electric fuel pumps, so it's not really alien technology. The Marina was engineered down to a price, and mechanical pumps were cheaper.

Go electric!


Chris

[david painter]

On my MGB I have fitted a larger Stainless Steel heat shield. Bought off a chap on ebay, been on the car nearly three years now not suffered any fuel vaporisation issues with it.
Dave

[balmy]

On my MGB I have fitted a larger Stainless Steel heat shield. Bought off a chap on ebay, been on the car nearly three years now not suffered any fuel vaporisation issues with it.
Dave

Mine has a s/s MGB heat shield too and again since fitting no issues at all.

[adam.final2.pdf]

New (old) air filter put in today, old one looked a little worse for wear. I love the old hexagonal box!

[JubileeNut]

I have fitted a new MGB heat shield which does help, but I think it is the rear carb jet pipe (small diameter bore) where the fuel boils off not the pump. Plus it is higher in engine bay so hotter still.
Can't see fitting an electric pump will sort this
This is due to heat or air temp. Engine does not die, just rough on idle which makes it hard to drive but as soon as you move all is fine. Maybe if the heat could get out of the top of the bonnet it also would not happen.
I can't see that forcing more fuel in will help if my pump is working as it should.the float chambers hold a decent amount of fuel and if that was boiling off then the car would stop dead, but it must still be OK as fuel is being delivered plus a bigger bore pipe.
Fresh air flow while static should stop the problem from happening.
It only happens when I am stuck on the M25 in the blazing heat and if any one has been on the M25 you know what I mean. As I drive the car mainly in hot weather you never know when you are going to hit a jam which could see you crawling for 2 hours!
It is a known fact that older carb cars suffer with E10 fuels. Also my car loves the cooler evening drive, goes like a scalded cat.

Hopefully Glen will let me know how he gets on with his pump but for a fair test the outside temp needs to be about 25 26 Deg C and stuck in traffic for 20 mins plus ticking over. Any other condition will probably not show what I am seeing.

[balmy]

Do you use super unleaded Paul? Less ethanol.


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[david painter]

Could you not sleeve some heat shield tube over it. Like the motorsport boys do for protecting throttle cables and the like.
Dave

[JubileeNut]

Hi Balmy, I use Shell V power fuel. No idea what the ethanol is on that fuel compared to others?
Hi David, Probably could wrap the pipe but would not want to make it more stiff as that could effect jet movement.
I just think 3.8 metres cubed a minute of air flow while static will keep the temp down locally.
Engine is fine as even under this strain during the traffic and heat went to only just above normal.
Faster I go the cooler the engine gets
If it was the other way round I would firstly be stripping out the water pump and all clearing rad etc.

[1972TCCOUPE]

I have installed the SU sucker pump in the engine bay and left the mechanical in place.It all works fine,but I'll have to wait for the next hot day to realy test it out. We found on the way to and from the nationals it was the original mechanical pump getting to hot,as soon as we poured cold water over the pump, not the carbs all was fine again,so fingers crossed it's cured.

[balmy]

Usually super contains less ethanol than standard but shell don't give exact figures-just up to 5% which means little.


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[Gee tc]

Read somewhere that the BP super unleaded has no added ethanol.
How true this is.... I don't know.
Have run mine on V power plus lead additive up to now.
It has overheated badly once, boiled up a bit after a thrashing back from tatton and popped a heater hose ( the only rubber I never changed) near the nationals. Doesn't get hot whilst on the move though.
I'm considering a sherpa rad or possibly a Kenlowe type fan as I get a bit paranoid with high temperatures!
T

[Kilroy]

Today was a winter sunday in NZ.
It began with a frost but became sunny enough to reach a magnificent 10 degrees later.
I had a late start and several matters to attend to - but was determined to have a Marina day if possible.

First thing was to bleed the clutch on a friend's Marina, after which I drove it several miles to both test my work and charge the battery - which has been sitting in frosty weather for several weeks.
All went well..



After that I fired up my trusty estate - also has been sitting in most inhospitable temps for some time.
It always starts promptly if I follow the same ritual - I think it is an SU thing.
- engage full choke
- crank it over 4 compressions
- wait at least 15 seconds
- hit the starter again and it is running on the first compression.
If I just crank away ad-infinitum it will eventually start - but has drained half the battery in the process.
I drove it briefly to warm it up - massive difference in handling and steering to the basically standard green one - it just steers eagerly rather than reluctantly.




Used the happy battery in the estate to jump start my B series auto Mk3 which has been marooned on the grass for a month.
Drove the latter for about 4 miles to both dry it out, and charge the battery.
Has a degree of urgency to its acceleration that I find highly addictive..



Next mission was to remove more parts of the interior of the van. I am stripping out the entire cockpit in order to fit the entire interior of my written-off Mk3 sedan.
I am progressing in the direction of making the van entirely watertight as the first measure - because I do not wish for all the soundproofing and carpet to get immediately soaked when I fit it.
Having replaced the drivers door, the footwell on that side is now fine.
The passengers side has a large puddle after all the rain we have recently received, so I mopped that out and let the whole thing air for a few hours..



Final move was to remove the front seatbelts from the donor car.
I do not need these for the van, but they need to be saved from condensation damage before it occurs - as good seatbelt sets are becoming harder to find.
Over here they will reject 'faded' belts during roadworthy checks. Stupid thing is that I have been failed on 'faded' rear seatbelts on three cars - but cars of this age do not even require rear seatbelts to be fitted - so I can simply remove them altogether and they then have to issue me my warrant of fitness.
I would rather have any rear seat passengers in 'faded' belts rather than none - but - the law is an ass...




So that's what I did to my Marina(s) today.

Cheers.

[Martec]

Hi Son,

I'm not sure if it helps but with my injection system controlled by and ECU it has a air temperature sender in the inlet air box, this will reach 50 degrees C when stopped in the garage very quickly, and that is on the opposite side to the exhaust!

At the back of the engine bay is a short length of door seal, it is only there to stop engine smells getting into the cab intake. If it is too long it restricts the small amount of air flow out of the back of the bonnet!!!???

Heat build up is probably not helped by using only an electric fan?

Nice to see you at Peterborough.

Brian

[JubileeNut]

Cheers Dad
Think i will do so testing ti see what differences it may make before fully fitting.

[MarinaCoupe]

How about some nice louvres in the left hand side of the bonnet to let the heat out?


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