I currently have an ali fuel tank, one inlet for the filler and one outlet for the fuel.
There is no fuel level sender in the tank....
What is the simlest/easiest way of fitting some form of low fuel level switch?
Its for a traack day car, so all i really need to know is..."you have 10 mins of fuel left before you have to pit"......
Only issue is, the tank has fuel in it, so I cant weld anything on.....
Is there a bolt on sender solution?
You can get transducers that fix to the outside of tanks......but don't ask me how to connect/wire one!
I imagine non intrusive sensors would be quite costly.
If you can drll a hold and have access to the rear side to fit a nut, then this RS solid state siwtch looks like it may do the job. Looks like it is
petrol/oil resistant too. £ 13 or so.
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=4774682
Hmm....there are no transducers that will work through the tank walls....they would have to be in contact with the liquid....(Unless I use a laser or
radar device to meausure fuel....which to be honest is a bit extreme!)
RS sell a range of cheap float switches.....wonder if one of those would work.....
Might just be able to get my hand through the filler hole to bolt the part inplace
Edited to say:
02GF74--that looks quite good...will have to have a closer look at the tank and see if I can get past the baffles to the bottom of the tank to fit
that device.
[Edited on 28/5/08 by tegwin]
You could maybe fit a simple sight glass to the tank but obviously you would have to check this visually. Personally i'd probably just cut a hole in the top and fit a standard sender unit to run a fuel gauge. Have to take the normal precautions with having had fuel in the tank.
you could run some clear plastic tubing from the tank, across the floor to the dash with vertical bit at the same level as the tank, put a coloured
plastic ball inside to show the level and ta da! fuel gauge, only prob is it will only give you a correct reading when the cars not moving and you’re
parked on level ground and in a crash it might spill a bit...but otherwise it's a winner.
[Edited on 28/5/08 by Mr Whippy]
quote:
Originally posted by Mr Whippy
you could run some clear plastic tubing from the tank, across the floor to the dash with vertical bit at the same level as the tank, put a coloured plastic ball inside to show the level and ta da! fuel gauge, only prob is it will only give you a correct reading when the cars not moving and you’re parked on level ground and in a crash it might spill a bit...but otherwise it's a winner.
[Edited on 28/5/08 by Mr Whippy]
Sausages to that....Im just going to use an old milkbottle tied to the dashboard...that way I can keep an eye on the fuel level "real
time"
Carry a jerry can in the footwell. Then when you run out on the track, just jump out and start filling up. 
I'm sure the marshalls will wave a flag or something. 
Mind you, not at Teesside they wouldn't
Mike
quote:
Originally posted by 02GF74
I imagine non intrusive sensors would be quite costly.
If you can drll a hold and have access to the rear side to fit a nut, then this RS solid state siwtch looks like it may do the job. Looks like it is petrol/oil resistant too. £ 13 or so.
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=4774682
quote:
Originally posted by 02GF74
I imagine non intrusive sensors would be quite costly.
If you can drll a hold and have access to the rear side to fit a nut, then this RS solid state siwtch looks like it may do the job. Looks like it is petrol/oil resistant too. £ 13 or so.
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=4774682
another option would be to have the tank fitted so it has some vertical movement and resting on a strain gauge or similar to measure the weight.
I am sure it is doable, but would take more than 1/2 hour.
quote:
Originally posted by 02GF74
another option would be to have the tank fitted so it has some vertical movement and resting on a strain gauge or similar to measure the weight.
I am sure it is doable, but would take more than 1/2 hour.
as you say, 3-6 of those with an LED array like this one:
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=2473056
Wouldnt be too hard to have the bars on the array progressivley go down with the fuel, and then when the last sensor looses the fuel, the entire bar
starts flashing...
Something to play with later I think!
http://docs-europe.electrocomponents.com/webdocs/00b9/0900766b800b98be.pdf
I seem to remember being recommend something along the lines of this when i asked the question, i bit the bullet and actually fitted a fuel sender and
gauge about a month ago, didnt take long as the wiring was already there.
Mike
Measure fuel pressure at the outlet...
Do you have a bendy filler neck or can you look straight down into the tank? If it's straight, attach a rod to the filler cap with a float switch
or similar at the end dipping into the tank, kind of like a huge dipstick. You'd have to have enough slack in the harness at the cap end to be
able to withdraw it out easily.
Of course, if drilling into the top of the tank isn't a problem then just fit a float-arm fuel level sender like most of us have
Fit a bike pump and gauges with a light already in it.....
surely a float switch would on/off like a yo yo when your blasting round corners
[Edited on 28/5/08 by darrens]
quote:
Originally posted by blakep82
quote:
Originally posted by 02GF74
another option would be to have the tank fitted so it has some vertical movement and resting on a strain gauge or similar to measure the weight.
I am sure it is doable, but would take more than 1/2 hour.
it would be all over the place over bumps though