Avoneer
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| posted on 27/6/05 at 04:17 PM |
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Blade fuel pump?
Anyone know what other bikes share the blade fuel pump for a carb'd model?
Cheers,
Pat...
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alister667
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| posted on 27/6/05 at 04:28 PM |
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I think most big bike fuel pumps will do the job. I used a 750 kawazaki fuel pump and it's fine.
http://members.lycos.co.uk/alister667/
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Avoneer
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| posted on 27/6/05 at 04:51 PM |
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How about an R1 one?
Is there anything I should look for, or is the pump the same as an injection engine one?
And where's the best place to mount it - next to the tank? Above the tank? Below the tank? Engine bay?
Cheers,
Pat...
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However a large number of electrons were terribly inconvenienced.
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alister667
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| posted on 27/6/05 at 04:55 PM |
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No an injection one would be much higher pressure (AFAIK).
Just a carb'd big bike.
http://members.lycos.co.uk/alister667/
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alister667
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| posted on 27/6/05 at 05:01 PM |
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There are a few differing opinions on mounting it.
As far as I know, (mine has done 6k road miles, and about a dozen track days without issue) I placed mine low down (below the level of the fuel tank)
but up quite close to the engine. I had heard that they are much better suited to pushing the fuel out rather than having to suck it in, hence
mounting it lower than the tank.
Having said that I've seen plenty of discussion on here, and few folks who do know what they're talking about have proposed other ideas.
Do a wee bit of a search on this and read what others have to say about it as well.
Cheers
Ali
http://members.lycos.co.uk/alister667/
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mad-butcher
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| posted on 27/6/05 at 05:17 PM |
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according to uncle haynes you need a pump which will deliver 900ml per minute the pump I used delivered 1800ml per minute. I put a regulator in line
but this cut down the flow but didn't cut down the pressure which explained why it was pumping juice out of the exhaust... I'm trying to
find out what the flow rate is on the old MGB cars are these pumps were electric and when they met resistance ie. full float chamber shut down
tony
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ChrisGamlin
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| posted on 27/6/05 at 06:52 PM |
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I mounted mine low down at the back near the tank and never had any issues, but I think as long as its gravity fed and not having to suck up-hill then
it will probably be fine, hence the variations in setup that all work.
Definitely needs to be a carbed pump though, as Alistair says an FI pump will pump much higher pressures (around 45-50psi as opposed to ~2psi!) so
you'll end up with a huge puddle of fuel in the engine bay and knackered carbs if you use one of those! 
[Edited on 27/6/05 by ChrisGamlin]
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chrisf
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 posted on 28/6/05 at 02:07 AM |
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Wait, Chris, you had an fuel feed welded to the bottom of the tank? Then gravity fed the fuel pump? I planned on tapping the top of the cell and
pulling fuel up, from the top Bad idea?
(Just wehn I thought I had this sorted...
--Chris
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Rorty
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| posted on 28/6/05 at 07:28 AM |
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If the pump is set up to suck, then keep it as close to the tank outlet as feasibly possible as there is a maximum theoretical amount of lift.
If gravity fed, then the pump could be 100 meters away from the tank and engine and still work OK.
I always mount below the tank, but close to the carbs so there is less likelihood of the pressure hose splitting.
Cheers, Rorty.
"Faster than a speeding Pullet".
PLEASE DON'T U2U ME IF YOU WANT A QUICK RESPONSE. TRY EMAILING ME INSTEAD!
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ChrisGamlin
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| posted on 28/6/05 at 10:31 AM |
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Chrisf - yep most fabbed tanks have a swirl pot at the bottom and the fuel is taken directly from there. If you need to pull fuel out the top of the
tank it might be OK although it could cause problems because the pumps dont like liting, in which case you can either tap into the bottom of your tank
instead, or maybe use a lifting pump to fill a small surge pot, and then this surge pot feeds the actual bike pump.
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chrisf
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| posted on 28/6/05 at 10:40 AM |
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My cell is the cross-linked poly cell. I can tap it anywhere I wish. I plan on filling the cell with foam. So, if I tap on the bottom, will the foam
effect any of this?
--Chris
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ChrisGamlin
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| posted on 28/6/05 at 11:10 AM |
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Im not sure to be honest, you'd not want the foam sitting right over the outlet you'd tapped I wouldnt think.
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Avoneer
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| posted on 28/6/05 at 10:39 PM |
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Ok,
So I can either mount the pump just next to the bottom of the tank or in the engine bay, at the same level as the bottom of the tank.
Either way, how am I best making my ali fuel tank:
Two flat vertical baffles dividing the tank into three sections with the outlet coming out of the bottom or side?
Or two flat vertical baffles as above, but with the outlet in the top and an internal pipe down to almost the bottom of the tank?
Pat...
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However a large number of electrons were terribly inconvenienced.
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Rorty
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| posted on 28/6/05 at 11:01 PM |
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When I make tanks, I aim to keep the compartments about 200mm wide, so if your tank is 600mm wide, then it would have two baffles.
I mark the bottom of the baffles on a sheet of Al and then cut a 25mm hole right on the line about 50mm in from each side, that way, when you cut out
the baffle, it has two semi-circular holes in it which sit on the bottom of the tank.
I make the top and sides first, then the baffles get tacked into the tank with just a few short welds.
If I'm also using foam, then I put it in at this stage, but it only needs to be about 3/4 the height of the tank.
I turn the tank upside down and drop in the blocks of foam and then weld the base on.
If space permits, I weld a 50mm length of 50mm or 80mm dia tube (with a blank end) over a similar sized hole in the base of the tank. I weld a NPT
nipple high up on the side of this little reservoir into which I screw the tap/fuel line. I also sometimes weld a drain into the blanking plate in the
bottom of the small reservoir.
Cheers, Rorty.
"Faster than a speeding Pullet".
PLEASE DON'T U2U ME IF YOU WANT A QUICK RESPONSE. TRY EMAILING ME INSTEAD!
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Avoneer
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| posted on 29/6/05 at 06:24 AM |
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So like a small resevoir on the bottom of the tank - I like this idea.
Do you have any pics?
Thanks.
Pat...
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However a large number of electrons were terribly inconvenienced.
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Rorty
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| posted on 29/6/05 at 06:28 AM |
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I'm a frayed knot.
Cheers, Rorty.
"Faster than a speeding Pullet".
PLEASE DON'T U2U ME IF YOU WANT A QUICK RESPONSE. TRY EMAILING ME INSTEAD!
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