MSefi.com read only forum (Jan.15,2018)

Hi everyone

I have 2 issues I need your thoughts on

1) My car was Carburetted before Megqasquirt so It doesn't have an 'in tank' pump.
In order to avoid fuel delivery problems, I built a Surge tank that sits in the boot (trunk).
Now I need to use a lifter pump to keep it filled.
Advice I’m getting is that lifter pumps need to be as close to the tank as possible and that I should not put it
above the tank in the trunk.
I'm told to put it under the car close to the tank to ensure long life. Problem is I don’t have the space under neath the car.
I was wondering what others have done in this case? has anyone put their lifter pump in the trunk and are there problems because it
sits above the tank?

2) Does anyone know which carburettored cars came with an electric fuel pump? I need to scavenge one from the local Car wreck yard.
Elternativly where can I get a decent new one from .

Thanks in advance
Sam

AFAIR Chevt Monza/Olds Starfire around '78 with V6 3.8L (231CID) engine had this design

best regards

hi WASyL
Thanks for your help.
Unfortunately we didn’t get those cars in Australia.
Does anyone know of any Japanese or European cars that may suit?

sam

mid-70 Civic had carb and fuel pump, but that pump is to weak for You

best regards

I think you need to pay attention to the kind of pump you are using. Some pumps are good at suction, others are not. High-Pressure EFI pumps do not suck well, for example.

But to feed your surge tank, you don't need high-pressure. Some of the electric pumps designed for carb use might work well enough for your situation. I'm about to build a new fuel system for my '70 Chevelle, using the the stock-style mechanical pump to feed a surge tank mounted in the engine compartment.

I spent 2 months in Melbourne in Apr-May 2010 and found it to be quite a nice place.

-Dave

Hi ChevelleFan

Thanks for your help

I've had a change of plan since I posted the message.
I managed to get a fuel tank from a more recent model that had EFI so I'm currently modifying the car to handle the new tank.
This tank has an internal lifter pump.
It’s a bit of a pity as I built the surge tank approach had progress ed fair way, but then the opportunity to get this tank came up and I took it.
Will you be returning back to Melbourne at any time?
if so, give me a yell and we can catch up over a beer and talk MSquirt

BTW, why were you in Melbourne for - was it with work? I don’t suppose you are in Information Technology by any chance?
Some of our vendors are U.S. based any they often send people over from time to time
Sam

In-tank pump is probably easier to do in the end. I'm struggling with the same sort of decision -- I have a brand new stock fuel tank (yet to be installed) that I anticipated using with my mechanical pump to feed a surge tank, but I recently found out a Buick GN gas tank (with in-tank pump) is almost a bolt-in. I've been playing with megasquirt since 2005 or 2006 and the fuel system has been the biggest pain for me the whole time.

Yes, I was there for work. At the time, I worked for MahindraSatyam, an Indian IT company, and our client was NAB. I'd go back in a heartbeat. The only problem when I was there, was that I was by myself, and had no one to hang out with in the evenings/weekends (and no transportation, as I could walk to work from my hotel.) I hired a motorcycle on a couple weekends. Great Ocean Road was awesome, and so were the hills/mountains east of Melbourne.

-Dave

Quite a few UK cars - and likely others - of the 80-90s - used an external high pressure pump made by Bosch. Range Rover, Jaguar, etc. There are also new equivalents on Ebay for around 50 gbp. It can cope with the V12 Jag engine so likely flows enough for most. It is normally mounted under the tank with a gravity feed to it via a 1/2" hose.

trakkies wrote:Quite a few UK cars - and likely others - of the 80-90s - used an external high pressure pump made by Bosch. Range Rover, Jaguar, etc. There are also new equivalents on Ebay for around 50 gbp. It can cope with the V12 Jag engine so likely flows enough for most. It is normally mounted under the tank with a gravity feed to it via a 1/2" hose.

How come carb car gets high pessure fuel pump when most carbs require just 0,5-0,6 Bar pressure to work poperlly and not get flooded

best regards

The vehicles I refer to had EFI. From the early '80s.

oh ok

best regards

There are also Mercedes cars through the 70's and 80's that had externally mounted Bosch high pressure pumps. As far as I know all of the gas powered cars should have them. That being said, they push near 100 psi, as the K-jetronic fuel system was targetting ~75 psi working pressure.

SU pumps were available in a version which lifted fuel from the tank. I'd guess there is a more modern equivalent. Lots of '50s UK cars had the pump sited either at the top of the boot - or above the engine on the bulkhead.

I've stuffed a fuel pump intended for a '94-'97 Mazda Miata into the fuel tank on my '72 Chevy. Just had to use a rubber hose to attach it to the end of the tube in place of the sock filter, and drill two holes in the top of the sending unit to run wires out.