EFI Conversion help please

Hi, I would like some advise, Landrover I want to use EFi in, seems an intank pump is going to be hard work, can I run it externally! Will it draw from the tank ok! or will I have to use a low pressure that can suck! or do some EFi pumps suck ok out of the tank! thanks

You can use a low pressure pump to a surge tank. then high pressure to the engine. Simplist way as a carby car doesn't usually have baffells in the tank. Also I used two bosch inline fuel pumps externally- worked fine

run a bosch 044 inline pump unless you have a bolt in option. Easy peasy and you jsut connect it to the existing outlet. Check inside the tank first, you will need some sort of surge chamber so it doesn't suck air around corners. If you cannot put one in the tank then run a small high volume pump to fill an external surge chamber, then get the bosch to suck out of that. Make sure your fuel return goes back to the surge chamber and that it has an overflow back to the tank.

Thank you, I like the idea of a small surge tank, as being 4wd will be necessary on certain angles

You can buy them ready made, or any alloy fabricator could make you one. VL commodores had inline pumps if you wanted a second hand one but then they are 20+ years old now and probably ready to die. A genuine bosch is a bit over $200 last one I bought. If you are spending a bit of time on funny angles then perhaps go for a larger capacity one, like a 2L instead of a 1L. Last thing you want is some fuel starvation at the wrong time!

Often an old EFI pump is used to feed the surge tank but an electric low pressure one will be fine as long as it has sufficient flow for your engine.

Thanks morrisman, do you have any ideas on suitable EFI hose, as it will be a reasonable distance, engine calls for 38 psi, but I guess it will have to handle whatever the pump is rated for! cheapest option!

Steel bundy tube, can buy it in rolls from BNT and Im sure other places too. 5/16 is a suitable size. For your flexi stuff, when it is on the pressure side of the pump make sure you use the proper stuff. Its expensive but necessary. normal flexi fuel line can delaminate and fall to bits with the 45psi of pressure. Get gates hose too, Ive seen some other brand (cannot remember but it came from part master) fall to bits over about two years, and it was meant to be EFI suitable too.

On the ends of the bundy tube you could braze or ezyflow on a brass hose tail, or use a compression fitting, or flare fitting to put a thread there and attach a hose tail to that.

and just to add, the system will operate at the pressure which the fuel rail's pressure regulator is set to, often 40-42psi depending on manifold pressure (vacuum). EFI hose will be rated to this, and of course the steel bundy will be too.