tank/pump outlet

Ralphh85 · Post by **Ralphh85** » Mon Aug 18, 2008 11:11 am

i am building an ali fuel tank, i have the fuel level gauge sender sorted, and will be using this fuel pump......

http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... :IT&ih=003

the biggest question is, is it best to have the fuel line coming from the bottom of the tank so its gravity fed in to the pump, advantage is that the pump will not strugle to suck it from the tank when its dry, but the odwn side is if the line comes off im going to be pissing fuel everywhere? dont seem very safe? or shouldn't it be a problem?

or i can have the pip coming up inside the tank and out of the top so that it needs to be sucked up, but in the case of pipe coming off/accident fuel wouldnt leave the tank?

the tank will be in the front of the car.

Ralph

chodjinn · Post by **chodjinn** » Mon Aug 18, 2008 11:21 am

The pumps aren't best for sucking, gravity feed is definitely best. And the pipe shouldn't come off at all if you install it properly. Connections require flaring/ribbing or whatever its called, and use good quality fuel clips and hose. If you want absolute saftey, spend some money on Aeroquip fittings et al, but IMO they are unnecessary for your power goals.

Ralphh85 · Post by **Ralphh85** » Mon Aug 18, 2008 11:49 am

its more of a safty thing if i was to have a crash, if the tank was shoved back it might break the pipe coming out off.

i see why car manufacturers use intank pumps!

Ralph

edit, anyone know what configuration was used in some of the cars it was used in?

ian.stewart · Post by **ian.stewart** » Mon Aug 18, 2008 12:48 pm

two things about the tank, pump is best to mount below the tank, so there ia allways a head pressure on the pump,, a pre pump filter is allways a good thing to add, I think I use a Audi V8 filter,
Pickup, after several problems with my pickup I ended up fitting a Devilbliss gun stem filter, the biggest I could find, this stops the possibility of any crap getting sucked onto the bottom of the feed pipe, I had all sorts of problems with a bit of card from a fuel addative cap being sucked onto end of the stem, My feed exits the tank at the front, but has a internal pipe that runs to the rear of the tank to try and avoid the dreaded fuel surge

chodjinn · Post by **chodjinn** » Mon Aug 18, 2008 1:18 pm

If you crash and the tank is pushed back, whether the pipe comes off or not is nothing to do with how or where you mount the pump. If I were you, I'd stop worrying about crashing and get on with building and enjoying it! If you're really worried, put the tank in a crash box or something with reinforced roll-cage type bars etc.

Ralphh85 · Post by **Ralphh85** » Mon Aug 18, 2008 2:15 pm

so you wouldn't worry about having the exit lower than the fuel level for saftey reasons? or is this normal on all the cars which use it?

i work next door to a hose an hydrolics place which can sort me out with a strainer to go in the tank and will

Ralph

Ralphh85 · Post by **Ralphh85** » Mon Aug 18, 2008 2:16 pm

chodjinn wrote:If you crash and the tank is pushed back, whether the pipe comes off or not is nothing to do with how or where you mount the pump. If I were you, I'd stop worrying about crashing and get on with building and enjoying it! If you're really worried, put the tank in a crash box or something with reinforced roll-cage type bars etc.

yeah your probly right!!

Ralph

tho my point was if the outlet was above fuel level (with a pipe going back down to the fuel) then it wouldnt piss out if the end was knocked off?

paul c · Post by **paul c** » Mon Aug 18, 2008 10:44 pm

are you talking fuel level right way up or upside down after the crash?

chodjinn · Post by **chodjinn** » Tue Aug 19, 2008 7:06 am

I see what you're saying, but if you're really that worried get a bag tank/cell. To be honest if I had a crash the first thing would be to get the feck outta there asap!

I think the main problem will be to get your motor going in a straight line!