Couple of fuel tank questions...

[jasongray5]

Bloke thats ment to be making it has let me down abit, so, was thinking i could do it myself!
Are there any issues with using steel instead of ally?

And Is there a problem with sitting it ontop of the diff cage instead of behind it?

Is there any problem with my tank being wide, deep, but not very tall (570x350x140) it will have a 100x100x100 swirl pot on the bottom. With at least 4 baffles in it to stop the slosh from beeing so shallow?

Cheers Guys, Jas

[RAYLEE29]

Hi, the book one is steel so no issues there, you can have plastic too as long as its fit for purpose.
Above the diff should be fine too, actually more protected from a rear impact.
all sounds good to me
have you read the IVA manual on fuel tanks if not should give you some reassurance before you make it
Ray:)

[jasongray5]

Cheers Ray!
I have had a quick scan through the manual and plastic ones must be type approved or something silly like that!
Hadn't thought that it will be better protected, but now you mention it...
Also, its going to give abit more room to fit fuel pump and filters where the tank would normally go, but below the outlet!

[deezee]

Most production cars had pressed steel fuel tanks so I wouldn't worry about it. I think 4 baffles is too many though. Just make sure its protected from corrosion with plenty of nice paint etc :)

I wouldn't make the tank too small, or you'll have an awful range on the car. I've made my tank slightly taller, but sitting in the same location. I imagine if you fit it on top of the diff cage, any kind of servicing is going to be a nightmare, unless you wanna drain and remove the tank to adjust the handbrake cable :eek:

[DaddyA]

Jase,

spikehaus on here as fitted his on the diff cage and looks good. Looks to be plenty of room for diff maint as well.

[mark]

Cant see it being a problem mounting it there

The only thing i can think of is that when the tank is full the centre of gravity of the car will be slightly higher

You would probably have to be able to drive like the stig to notice any detrimental affect to the handling though :D

[HandyAndy]

You would probably have to be able to drive like the stig to notice any detrimental affect to the handling though :D

well Spikehaus has fitted a V6 so should be nice to drive:eek: :cool:

andy

[jasongray5]

Cheers for the replys guys!

Think its going in the "conventional" place afterall, will make it abit easier to do diff maintainance, and will give me somewhere to put my helmet (oooo-err):D

All the best guys, Jason

[jasongray5]

Right, i think i'm going for an ali tank afterall

Sooooo...

What have you guys done for outlet/inlets (8mm) and a fuel cap?

I have heard that several people used caps like this Click! (http://cgi.ebay.co.uk/Alloy-Filler-neck-cap-38mm-Bore-Fuel-oil-tank-Tall_W0QQitemZ180458726696QQcmdZViewItemQQptZUK_Ca rsParts_Vehicles_CarParts_SM?hash=item2a042da528)

But as its not a locking one, it has to be teathered? How would you guys go about that?

[AshG]

drill a hole through the cap tap it and screw a bolt into it. then put the tether round the bolt. attach the other end of the tether to the car.

[Spikehaus]

The tank I ordered was to the book specification, it was only when I tried to fit it I found that the back tub prevented it from fitting without cutting out and re-welding it. I am using ali rear panels so the tub is to book spec. Therefore, I decided to sit on top of the diff as it fitted nicely. Kind of a happy accident!

[davidimurray]

Taken from the CBS January newsletter -



TETHERING FUEL CAPS


UK IVA (Individual Vehicle Approval) rules require that most fuel caps must be tethered to the filler neck so that you don't drive away from the petrol station leaving the cap on your wing or on the petrol pump.


Here's one suggestion on how to tether an Aero-style cap although you can apply similar techniques to many other types of cap.

The tether we chose is brass picture frame wire. It's a fine, multi-strand, flexible wire that has good corrosion resistance and can easily be soldered. To secure the ends we used cut-down uninsulated crimp terminals.




We drilled two 1.5mm holes in the plastic bottom of an Aero cap in a position that would not interfere with the locking action of the cap. The wire was threaded through the holes and the terminal slipped over the wire and crimped. You can also solder it for added strength.





The tether should be 6 or 8 inches long and must, of course, be also somehow tethered down inside the neck. Here we've shown one option looping through the holes of an unleaded insert before it is fitted into the neck. And simply drilling through the neck. The filler hose will just slide over the wire and seal higher up the neck.

We'll be selling a half metre of the cable with fuel caps for an extra quid if you need it.


Other styles of cap may have other tethering options like the one pictured below.

[jasongray5]

Cheers Guys!

My tank is going in the conventional place, just a little taller and thinner than book spec?

Im still fairly baffled about what to do for outlet unions? How to join them or is there such a thing as a 1/4 npt threat ali nut that can be welded to the inside of the tank??

Jas