lsdweb
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| posted on 1/2/08 at 08:46 AM |
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Alternative fuel tank position?
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
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Mr Whippy
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| posted on 1/2/08 at 08:55 AM |
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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.
Fame is when your old car is plastered all over the internet
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TimC
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| posted on 1/2/08 at 08:59 AM |
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The Procomp race tanks are pretty impressive:
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speedyxjs
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| posted on 1/2/08 at 09:18 AM |
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If it is for a race car, what about the passenger footwell?
How long can i resist the temptation to drop a V8 in?
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procomp
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| posted on 1/2/08 at 09:31 AM |
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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
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Howlor
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| posted on 1/2/08 at 09:48 AM |
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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
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Fozzie
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| posted on 1/2/08 at 09:55 AM |
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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]
'Racing is Life!...anything before or after is just waiting'....Steve McQueen
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iank
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| posted on 1/2/08 at 10:15 AM |
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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 suspect it'd be because then you've effectively made the car into a single seater.
Even the 750 cars have always needed at least a pretence that they have a second seat (even if it would suit only a 2stone 4ft high passenger).
[Edited on 1/2/08 by iank]
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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t.j.
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| posted on 1/2/08 at 01:24 PM |
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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
Please feel free to correct my bad English, i'm still learning. Your Dutch is awfull! :-)
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lsdweb
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| posted on 3/2/08 at 05:04 PM |
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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
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Maradona
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| posted on 3/2/08 at 07:13 PM |
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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
Diego,
The locost builder from Argentina
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Mazler
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| posted on 3/2/08 at 07:49 PM |
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fuel tank
The Mazda Mx-5 has it behind the driver... and they're allowed to race.
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Mazler
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| posted on 3/2/08 at 07:53 PM |
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Why doesn't the darned image show?
 
Rescued attachment Miata fuel tank05.jpg
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scudracer
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| posted on 4/2/08 at 02:30 AM |
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If I remember correctly doesn't Donkervoort have twin tanks positioned ahead of the rear axle line?
Shameless-ad-supported-blog-that-belongs-to-my-friend plug - http://www.sevenbuilder.com & http://www.bikervoodoo.com
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procomp
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| posted on 4/2/08 at 08:08 AM |
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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
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simes43
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| posted on 12/2/08 at 11:47 AM |
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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]
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lsdweb
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| posted on 18/2/08 at 07:58 PM |
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Simes
I'd be interested to see the finished version.
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Minicooper
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| posted on 18/2/08 at 09:05 PM |
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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
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kb58
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| posted on 18/2/08 at 10:35 PM |
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How about a long narrow one where a tradition transmission would go, below and behind the floor shifter?
Mid-engine Locost - http://www.midlana.com
And the book - http://www.lulu.com/shop/kurt-bilinski/midlana/paperback/product-21330662.html
Kimini - a tube-frame, carbon shell, Honda Prelude VTEC mid-engine Mini: http://www.kimini.com
And its book -
http://www.lulu.com/shop/kurt-bilinski/kimini-how-to-design-and-build-a-mid-engine-sports-car-from-scratch/paperback/product-4858803.html
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