jamesbond007ltk
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| posted on 13/6/06 at 12:00 AM |
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Feed and return T-piece
My locost is running a 1600 pinto on twin 40's. The fuel setup is such that i have feed going to the stock mechanical pump then up to the banjo
on one of the carbs. On the pipe between the pump and the 1st carb there is a t-piece that connects to the tank return hose.
The problem i have is that one leg of the T-piece is crushed and therefore restricts the fuel flow.
According to ford the pinto was originally fitted with a fuel/air seperator between pump and carb that incoporated the return conection.
The question is, should i be using a seperator or will the t-piece work fine? If it will be fine anyone know where i can get one of them from. Mine
was originally off a CVH mk3 escort but to buy part from ford you have to buy attached hoses too for £25, for a bit of plastic?
Anyone got any ideas on how I should be plumbing my fuel system?
Thanks
Richard
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Dusty
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| posted on 13/6/06 at 12:03 AM |
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I ran my pinto, twin forties, mechanical pump with no tank return at all for a couple of years with no problem at all. Ditch the T.
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jamesbond007ltk
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| posted on 13/6/06 at 12:09 AM |
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Thanks dusty, so just run feed straight pump to carb and block off the return hose then? Take it you had no problems with flooding or high fuel
consumption? No need for fuel/air seperator?
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DIY Si
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| posted on 13/6/06 at 07:26 AM |
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You probably won't have any problems with it. Your engine will use more fuel than standard due to having twins on it anyway. Can't say
I've ever had a return line or an air seperator on any carb'd car. Also, why would there be air in the fuel line? Where would it come
from?
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roadboy
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| posted on 13/6/06 at 08:10 AM |
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Never seem fuel return line on twin carb set up, it just is not necessary as long as fuel pressure is not excessive, best bet is to use a Facet
electric pump which will supply the correct fuel pressure.
Regds
Ian
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DIY Si
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| posted on 13/6/06 at 08:16 AM |
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But if you use facet you then need a regulator don't you? I thought just about all their pumps ran too high a pressure or toolow a pump rate for
twins? Could be wrong though. And you'd be amazed just how far you can stretch a standard pump. My mini's pump came off a 1300 metro
pushing out 55-60 bhp. It's never missed a beat pushing out 145-150 bhp! Tuned engines tend to spin higher, and as such pump more fuel as they
do so. The pump is also designed to pump more than the engine requires at all times to prevent fuel starvation, so upping the power merely reduces
this margain of error/safety. And should it ever break it's cheaper to replace.
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britishtrident
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| posted on 13/6/06 at 08:25 AM |
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No return required, the few volume production cars (Lotus, Hobay Hunter) that used twin 40DCOEs didn't use one
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roadboy
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| posted on 15/6/06 at 06:55 PM |
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No need to use a regulator if using the correct Facet pump, I think the pressure is around 4.5 psi for carbs, info available in Burton catalogue
etc.
Regds
Ian
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