Fuel tank conversion.
Turbo Mini Forums

Has anybody converted standard mini fuel tank for efi ? Inline fulepump and just a return port ? Mpi spi tanks are hard to find here

If you’re handy, you could modify any take to fit an in-tank pump. Just a case of cutting holes and extending the pump hanger.

I’m using a Subaru pump in an alloy tank.

In the 13's at last!.. Just

A lot depends on your skill set.

But it is "easy" to modify for external pump, and add a return line.

It would be a lot more work to convert a standard tank to an in-tank pump

cutting, welding tanks....comes with it's own risks that would need negated.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

I added a return onto my van tank using a hose barb just drilled a hole next to the sender hole before fitting it.

https://www.ebay.co.uk/itm/374329589714?mkc...media=WHATS_APP

With a couple of copper washers

Edited by monsterob on 20th Nov, 2022.

Outside the box

I modified a tank for a member on here useing Swage Lock fittings, with 3/8 feed and return lines. Used an external pump type unknown return was plumbed in next to the feed in the bottom of the tank and extended to the top outboard corner.

Edited by Mr Joshua on 20th Nov, 2022.

Own the day

Thanks for the info. Modifying the standard tank sounds like the go thanks.

I've silver soldered 3/8" pipe into a tank in the past for flow and return. If I was to do it again I'd favour using AN6 weld on bosses.

Second Steve's comments on risks with welding fuel tanks that need to be mitigated.

Shane

If you’re considering welding your fuel tank with tig/Mig, always purge the tank with nitrogen! Safety first!

All the tanks I have modified I have had to cut a section out the top of the tank to get the work done then mig welded the cut out piece back in. I filled the tank with water when I cut into it, by the time it came to close it back up The tank was totally purged of any combustable substances so didn't require back purging.

Own the day

clean/flush with detergent as much as possible, and before any cutting/welding, as above, fill with water and retain as much water as you can during the process.

It's not so much the petrol that's dangerous, it's any vapours left behind that would be explosive. Leave a little room for any vapours there may be as possible.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Why put it in the tank when you don't need to?

I used an external pump.. my fuel pump was in the standard location on the rear subframe

I put a fitting in the top of the tank for the return. I didn't even run a new fuel line, I put the regulator next to the fuel pump and returned straight out of it back up to the tank.

People say "but but you can't do that!", can so..

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will