Baffled tank or swirl pot
Turbo Mini Forums

My first post! Afternoon all. I have chosen to go 7 port and injection so need to fit high pressure pump.
In a pick up so I cant use an mpi tank.
I dont particularly want to use a swirl pot which is recommended. Just more things to go wrong. So would a baffled tank do the same job. And with the pump sited lower than the tank is gravity enough to feed it.
Please chuck as many examples at me as possible. This is probably what I am least looking forward to in the whole build
G

welcome.
I may be missing something here but why can't you use the MPI tank?
I run one for my K1100 turbo engine, just changed the pump out for one with a flow rate and pressure that met my requirements.
What fuel pressure are you intending to run and what injector size?

Shane

It's a pick up not saloon
Injector size and pressure I will check
I want to say 3 bar with the regulator?

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Edited by IronmanG on 13th Apr, 2020.

Sorry I missed that bit totally.
Why are you not wanting to use a swirl pot and lift pump?
If you want something bespoke made, speak to Clare and Bob at concept racing, they can make you a baffled foam filled tank to suit your needs.

Shane

Edited by shane on 13th Apr, 2020.

How much space is above the top of the tank when it's installed?

Shane

Not much. It's pretty snug.
I dont want 2 pumps when I can have 1 and I dont want effectively 2 tanks if I can have 1. If a baffled tank does the job and I can put the pump on the su frame and a gravity feed is adequate I would prefer that.
Thanks for the contact I shall give them a call

It can't be gravity fed on a lwb tank because the pickup is the middle of the tank half way up. The lwb tank can suffer from starvation on sweeping bends etc. I have fitted a swirl pot and 2 pumps after recommendations on here

Just a side thought, I remember reading recently in PPC magazine, one of the contributors has a Scimitar with an Omega engine in. I believed it ran a MK2 golf pump as it was a neat self contained unit/ separate small tank which did all he needed to run the EFI. I may be wrong on the detail as it was a few months back.
My girlfriend takes the magazines to work for one of her colleagues when Ive finished with them so I can't check.

These link may be of assistance;
https://fuelinjectorclinic.com/flow-calculator
https://www.raceworks.com.au/calculators/

Shane

An old Golf Bosch pump is the same as the Metro turbo ( and many others ) fuel pump.

Really...if you can get inside the tank and do some serious work...it could work just fine. But that'd be no small task.

2 pumps and a small fuel surge tank would be the easiest, there are quite a few good compact units around. Or if you can find an EFI pump that can suck a little bit ( most do not ), you could install Holley's Hydramat inside the tank. But it isnt exactly cheap either.

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

Do you have some pictures please?

half way down the post, appreciate its a saloon but the theory is the same.

http://www.turbominis.co.uk/forums/index.p...id=153895&fr=50

Shane

I’d modify the tank for an internal pump and plate. It’s not difficult and makes for a cheap, simple, quiet setup with lots of pump options.

In the 13's at last!.. Just

This was my line of thought when questioning the clearance above the tank, I was also thinking of adding a well/resevoir that the pump sat in to keep the pump supplied with fuel in the periods where fuel was sloshing about under heavy cornering?

Ye just been having a think. I reckon weld some aluminium plate in to the tank about 3 inches high 5 inch diameter. Drop the pump into it. Couple of small holes allow fuel out and minimise sloshing. An mpi pump with the return. Even weld an extra bit on the tank so it protrudes slightly below the normal level
.

https://www.motorsport-tools.com/catalogsea...esult/?q=walbro

You may find yourself something here that may save you some fu@@ing about.

Shane

This is what Nick Upton of Woodland California did for us that we use in our wagon.

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Edited by tmsmini on 14th Apr, 2020.

Very neat indeed. Thanks for the pictures

I'm sure I've seen a picture on here of someone doing similar, with a neat oval shaped access port in the side of the tank, to accept an in tank pump. Can't find it though.

This might be the one Tom is referring to:
http://www.stallard-engineering.co.uk/stor...he_fuelling.htm

http://www.stallard-engineering.co.uk/stor...he_fuelling.htm

Interesting that. Thankyou

Interesting that. Thankyou

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

Ours is in a little box that acts as a baffle and seems to be working well enough.

The Hydramat looks great, but doubles the cost of a tank.
https://www.holley.com/products/fuel_systems/hydramat/

What some of the US aftermarket efi tank manufacturers have done is make a recessed area in the top of the tank where the electrical and fuel connections can be made. The whole pump and swirl pot in one just drops in. I am not sure this is possible with an LWB tank.