Nick Davison
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| posted on 15/7/02 at 08:55 PM |
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Turbo fuel system
I have been told that I will need a swirl chamber in the fuel tank if I fit a turbo. Is this necessary or can I get away with a normal injection fuel
pump? The engine is Lancia 2.0L Turbo and the fuel pump is from a 2.8L Capri injection?
Nick
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Jon Ison
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| posted on 15/7/02 at 09:06 PM |
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what did the Lancia have as standerd ?
Have a word with Jame's "Hicost" he runs serious turbo.......
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Fatboy Dave
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| posted on 15/7/02 at 09:26 PM |
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Is your engine running now? Then why bother?
If it isn't, then a standalone surge pot (rarther than swirl pot, if you are worrying about starvation) would be a good idea. Is your fuel pump in
tank or external? Most intank pumps usually have a little sump 'dimple' in the bottom of the tank to ensure that there is always fuel available to
the pump. A surge pot would do the same function if you are feeding it low pressure and have the main pump feeding out of it.
A swirl pot normally just de-aerates the fuel (by the means of a cylindrical tank) to get the air outta the way (technical term)
IYSWIM
Dave
Stop the planet, I want to get off
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Nick Davison
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| posted on 16/7/02 at 06:18 PM |
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The engine isn't in the car yet but I need to finish the tank. The lancia one had a pump in the tank with a large cylindrical chamber round it,
which I still have. Do I have to use a similar system to that or could I still get away with the dimple you mentioned?
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Fatboy Dave
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| posted on 16/7/02 at 10:11 PM |
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The cylindrical tank was a built in surge pot (keeps a reserve of fuel available to the pump during cornering). You're probably better off
replicating what the Lancia had. You could use the dimple, but I'd prefer the cylinder welded to the bottom of the tank, with cut-outs around the
base of it.
Sounds like an idealsetup to me.
Dave
Stop the planet, I want to get off
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johnston
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| posted on 16/7/02 at 11:06 PM |
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Think of your tank like ur sump if u coner hard the fuel goes to one side if and loses pressure if it goes away from the lifter pump the same way u
can lose oil pressure. only now youll get a miss fire.
the problem is that when a car loses fuel pressure it goes lean and runs hotter and can cause detonation add that to a turbo which is already running
hotter you get problems with real bad detonation which can then lead to melted pistons or can cause the turbo to heat up and warp the shaft or melt
the impellors.
so basically u need some system (any system) to make sure your pump doesnt suck air when cornering hard (or donuting)in the wrong direction.
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Nick Davison
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| posted on 17/7/02 at 05:43 PM |
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Thanks for all that. I will try and adapt the Lancia system; it is about the same depth as the half built tank. If it won't fit or takes too much
room I may have to build a bigger tank. As it is I will probably be refuelling every 100 miles or so with the consumption on this one!
If it all works I will post some pics of it, but don't hold your breath!
Nick
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Nick Davison
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| posted on 19/7/02 at 08:20 PM |
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This Lancia one is integral with it's own swirl chamber, if it was good enough for the Thema then it should be good enough for me.
It has a single inlet hole in the bottom about 6mm I take it I should have this pointing to the rear of the car to stop fuel escaping under G?
Nick
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Fatboy Dave
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| posted on 19/7/02 at 10:03 PM |
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I'd probably have a couple of holes in the cylinder (at 1,5,7,and 11 o'clock).
Hicost, I'd probably say 1.5litres is a bit small for a surge pot, my V8 has a two litre tank, and my favourite bit of road can have it coughing and
spluttering at high speed.......
Dave
Stop the planet, I want to get off
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