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Sept 1, 2011 19:30:02 GMT
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sorry. was gonna write up a helpfull reply but was late and I felt like I was repeating myself.
anyways.
to run a fuel injection system properly you need a good, consistant fuel supply.
factory injection fuel tanks will have some sort of baffles in the tank to keep the fuel around the fuel pick up pick at all times, even when under heavy cornering, else the pump will run dry and damage the engine or the pump.
even worse on a high powered engine and worse still on a turbo engine were running weak mixture at high rpm, high boost will very quickly damage the engine, melt pistons etc.
so you need an injection fuel tank.
or an external swirll pot, surge tank. which is fed from the fuel tank via a low pressure, high volume fuel pump.
so it goes.
fuel tank - normal carb type fuel pump - surge pot - high pressure fuel pump - fuel filter - injectors - fuel regulator - back to the surge pot.
surge pot should also have another pipe returning excess fuel to the fuel tank.
so getting hold of a factory fuel injection tank is deff the easy way to do it.
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Last Edit: Sept 1, 2011 19:31:54 GMT by Al Ramone
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bortaf
Posted a lot
Posts: 4,549
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Sept 1, 2011 21:49:23 GMT
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you could weld a swirl pop out of a sierra or granada into your or a spare carb tank, that's what i had done for £50  |
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R.I.P photobucket
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Sept 2, 2011 13:17:23 GMT
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Sorry matey my fault, been a bit stressy recently - just re read the thread and I haven't really acknowledged anyone for any help! Sorry bout that. I've actually got it running well now, after replacing boost hoses and clamps, vac lines, TPS, ECU, processor chips, earths, CAS and AFM! I think it was the AFM causing the poor running!! Bortaf, I take it the tank would need to be split open? Sounds dodgy! Ive seen some swirl pots that are external but i guess with those ones a lift pump is essential. Can the return from a swirl be T'd into the main return or would it cuase flow problems? With regards to the tank, I've done an accumulated trouble free (fuel wise at least) 1000+ miles without an official swirl pot, but I think what's happening is I've used a big fat fuel filter before the pump, so the pump is filling that and then an shortage at the pickup is being kind of sorted out by the big fat filter full of fuel. However with this method there is a second or so where the pump is having to draw fuel up as there is no lift pump so has no lubrication until the filter is full on priming and over a little while I guess it's wearing the pump out. The trouble I've been having recently is different - the pump inlet being fatter than the pump pickup and pipes meaning that the step down is creating weird pressure/restriction and sucking the pipe flat. Which I guess accounts for the vaporisation mentioned previously. Basically, as a temporary measure I'm replacing the pump and lines with original size again (as I had no problems with them int terms of delivery) and then keep an eye out for a 2.8i tank thats a bit closer to me (I guess there would be problems in posting a tank - fumes etc..) or sort out a lift pump and swirl pot soonish to match my pump. Anyway, thanks for the help chaps  I've sorted a more suitable pump |
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Copey
Posted a lot
Posts: 2,845
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Sept 2, 2011 13:58:27 GMT
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davey the return from the engine goes to the swirl pot and then the swirl pot returns to the tank, if you went external, and yeah, you would need a lift pump, i had that settup on mine until i got hold of a 2.8i tank
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1990 Ford Sierra Sapphire GLSi with 2.0 Zetec
1985 Ford Capri 3.0 (was a 2.0 Laser originally)
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Sept 2, 2011 16:40:54 GMT
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Cool that makes sense cheers ears. How's yours coming on? Feel like cubing mine sometimes!
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bortaf
Posted a lot
Posts: 4,549
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Sept 2, 2011 18:55:18 GMT
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Sorry matey my fault, been a bit stressy recently - just re read the thread and I haven't really acknowledged anyone for any help! Sorry bout that. I've actually got it running well now, after replacing boost hoses and clamps, vac lines, TPS, ECU, processor chips, earths, CAS and AFM! I think it was the AFM causing the poor running!! Bortaf, I take it the tank would need to be split open? Sounds dodgy! Ive seen some swirl pots that are external but I guess with those ones a lift pump is essential. Can the return from a swirl be T'd into the main return or would it cuase flow problems? With regards to the tank, I've done an accumulated trouble free (fuel wise at least) 1000+ miles without an official swirl pot, but I think what's happening is I've used a big fat fuel filter before the pump, so the pump is filling that and then an shortage at the pickup is being kind of sorted out by the big fat filter full of fuel. However with this method there is a second or so where the pump is having to draw fuel up as there is no lift pump so has no lubrication until the filter is full on priming and over a little while I guess it's wearing the pump out. The trouble I've been having recently is different - the pump inlet being fatter than the pump pickup and pipes meaning that the step down is creating weird pressure/restriction and sucking the pipe flat. Which I guess accounts for the vaporisation mentioned previously. Basically, as a temporary measure I'm replacing the pump and lines with original size again (as I had no problems with them int terms of delivery) and then keep an eye out for a 2.8i tank thats a bit closer to me (I guess there would be problems in posting a tank - fumes etc..) or sort out a lift pump and swirl pot soonish to match my pump. Anyway, thanks for the help chaps I've sorted a more suitable pump Just cut a hole in the sierra tank around the swirlpot and remove it along with the 15mm outlet and insert in in a capri tank, it's not as scarey as people (usually people who have never tried it) make out, just make sure the tank is washed out well, test it by dropping a lit match in there, no it wont blow up at worst there will be some flame at the filler but even then only if you didn't wash it out. |
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R.I.P photobucket
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Copey
Posted a lot
Posts: 2,845
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Sept 2, 2011 22:59:47 GMT
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Cool that makes sense cheers ears. How's yours coming on? Feel like cubing mine sometimes! got a reconned turbo on now, but waitin on new oil/water feeds from japan at the mo |
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1990 Ford Sierra Sapphire GLSi with 2.0 Zetec
1985 Ford Capri 3.0 (was a 2.0 Laser originally)
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Sept 9, 2011 20:06:24 GMT
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