Hi All
I'm not sure if this is in the right place but, has anybody placed their fuel tank in a different position from the norm?
I'm just trying to work out the best location (race car) as the standard position appears a little vulnerable in a race car (although I know they
are nearly all there!).
Has anybody placed theirs between the axle / De Dion and the rear bulkhead. This may give a little more protection.
The other option is to go behind the seat(s), with a suitable bulkhead of course, although this would be subject to the regs allowing it!
Wyn
This has been mentioned before as others have the same concern. I was going to put it above the rear axel in my old MK indi as that looked the safest place. Not many other places I could think of apart from inside the scuttle though the thought of fuel above my legs didn’t seem a good idea, old planes like the spitfire had this location, pilots often burned to death as a result. If I was going to race the car perhaps a tank in the passenger compartment might work but don’t know if that’s allowed. Unfortunately one of the many safety issues with the 7’s design.
The Procomp race tanks are pretty impressive:
If it is for a race car, what about the passenger footwell?
Hi no fuel tanks allowed within the passenger compartment. The MSA stopped us from putting tanks in the passenger compartment IE passenger seat area.
Even when behind a fully sealed bulkhead.
Any ideas as to how many litres you are going to be needing. As a guide the above pic ( cheers TIM ) is a 5gallon/23 litre tank. Good for a 1.8 Zetec
on twin 40's to do a 30 min race with some left in reserve.
Cheers Matt
Although I haven't had a blue book for a couple of years I would have thought a sealed bag tank with cert would have been ok for a footwell.
Steve
Yep I did mine above the axle/behind the rear bulkhead.......it's also foam filled. 
I designed it, giving an awful lot of thought to it, and a mate made it to my spec.......(before we got the TIG).........
HTH Fozzie
[Edited on 1-2-08 by Fozzie]
quote:
Originally posted by Howlor
Although I haven't had a blue book for a couple of years I would have thought a sealed bag tank with cert would have been ok for a footwell.
Steve
I want to place it just behind the seats.
So above the axle.
It's maybe bad for the cog, but an accident from a rear collision is probably more the case then an accident due the higher COG
Thanks Guys
Matt - that tank looks excellent and the design makes it look like it would be pretty easy to fit a bike fuel pump in the 'sump' so doing
away with a swirl pot etc.
Wyn
The race cars use fuel cell tanks, these caind of tanks is made from glass fiber and in case of colision never break, and never drop the fuel, here is
the link to ATL tanks
http://www.atlinc.com/US/racing.html
cheers
The Mazda Mx-5 has it behind the driver... and they're allowed to race.
Why doesn't the darned image show?
Rescued attachment Miata fuel tank05.jpg
If I remember correctly doesn't Donkervoort have twin tanks positioned ahead of the rear axle line?
Hi the MX5 tank shown is actually below the the floor-pan area. Although it is a raised floor-pan area it is not actually inside the car if you see
what i mean.
Cheers Matt
I am about to get the following design priced for a 4 gallon tank with baffles, foam filled and with different vent options.
Apart from being in a far safer position, a back to back test of a similar design against the standard behind the axle position, gave better weight
distribution (over and in front of rear axle) and reduced the dreaded high speed understeer to give neutral balance on faster corners.
Should be sub £100 per tank, if anyone is interested in a group buy.
Sorry about the diagram! The tank has plenty of clearance for the axle to move without them touching.
[Edited on 12/2/08 by simes43]
Simes
I'd be interested to see the finished version.
Hello all,
I'm not doing racing but I'm interested in the safest location to mount a fuel tank and what type is best, I'm doing a spaceframed fwd
bec mini and I don't have a rear bulkhead.
I was thinking of something like these from rallydesign, if necessary I can build this type of tank into a metal box behind the seats.
Can I bring the remote filling tubes through the rear of the driver compartment to the original petrol filler location on the left rear, or does
everything have to be sealed from the drivers compartment
http://www.rallydesign.co.uk/catalog/product_info.php?products_id=1853
http://www.rallydesign.co.uk/catalog/product_info.php?products_id=1881
Hopefully this make sense
Cheers
David
How about a long narrow one where a tradition transmission would go, below and behind the floor shifter?