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Aluminium Drop Tanks

Public Enemy
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Public Enemy Community Regular

Public Enemy

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Posted

After reading posts about the in car fuel smell associated with surge tanks mounted in the boot i was wondering if having an aluminium drop tank (SLR5000 style) built with an in built surge tank would be feesible. I guess it's just a matter of more money!!!

I would also go for added baffling in the tank as well or maybe that foam stuff you can get for motor bike tanks.

What do you think?

I guess getting to the fuel pumps may be a little more difficult.

ANyone know where i could get one built in Perth?

cheers

Paul

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Craved Grand Master

Craved

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Posted

Or use a sealed box as legally required if you have it in the boot.

as for the drop tank, to remove the wheel well and reinforce the area, then have the drop tank installed and engineered . it will cost you a fair bit.

have thought about this before though .. you also shift the balance of the car since the std tank is over the rear sub frame, this would move the weight back and potentially cause some over steer characteristics when full tank and cornering

Public Enemy Community Regular

Public Enemy

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  • Author
Posted

Thanks for the replys guys.

Might as well get a quote for one i guess cheers for the contact details bubba.

For those that have mounted underneath, what size surge tank did you use? I was planning to run Sard 7.5l with twin bosch044's.

Thats a pretty big tank to hang underneath.

dontfeelcold Experienced

dontfeelcold

Posted
Posted (edited)

If you were going to the trouble of a drop tank, you should also put baffles and trap doors in the fuel tank, this forces the fuel into the front centre of the tank. Just like your engine sump. Also bend the top of the baffles into the centre to stop the fuel from sloshing out of them.

Edited by dontfeelcold
Public Enemy Community Regular

Public Enemy

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  • Author
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What setup does this car have that requires something that large?

2.5ltr would be enough for most easily

can you fit 2 x 044 pumps inside a 2.5L? I was looking at the 7.5 because it says its big enough to fit 2 bosch pumps, thats the only reason i would use one so big.

Don't care if it looks good or ghay, it's not there to change the look of the car or an attempt to grab rice points or look like a Torana ffs. in fact it would be painted matt black so you prolly wouldnt even notice it.

Anyways i thinking just mounting the surge tank underneath is the way to go.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Why would you ut the pumps inside? I dont get it. :nyaanyaa:

It goes like this

- You have a lifter/feeder pump to the surge tank.

- From the surge you run whatever pumps you need external of the surge tank.

- The externally mounted pump(s) feed the fuel rail

GeeTR Grand Master

GeeTR

Posted
Posted
can you fit 2 x 044 pumps inside a 2.5L? I was looking at the 7.5 because it says its big enough to fit 2 bosch pumps,

:D

I too didn't want the surge tank in the boot, or have to run $$$ lines just for smell. I'm currently mocking up a s.tank to fit up under the car, in front of the f.tank. Stock pump as a lift, then a 044 sitting OUTSIDE the enclosure pushing fuel up front.

PS: Has anyone else heard, that you can get increase knock value from driving hard with below 1/4 fuel in a BNR32?

25GTT Veteran

25GTT

Posted
Posted

Yup Briffa engineering in Morley, has already done a couple on the 33 gtsts anyway. Ask for Mick he is the owner

A very old school friend of mine, tell him webby sent ya, i used to sit next to him and get in trouble for laughing all the time.... oh those were the days.

He has done plenty of work to mine and am happy with the results!

Public Enemy Community Regular

Public Enemy

Posted
  • Author
Posted
Why would you ut the pumps inside? I dont get it. :P

It goes like this

- You have a lifter/feeder pump to the surge tank.

- From the surge you run whatever pumps you need external of the surge tank.

- The externally mounted pump(s) feed the fuel rail

why mount them out side when you have them inside, i don't get that. Especially when there under the car getting hit with rocks and covered in dust and water.

All the drawings i've seen from sard show the pumps inside the surge tank.

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