Help! Fuel pump advice needed
Discussion
The replacement fuel pump I obtained, Bosch 0580 254 910 ( Capri 2.8 application ) is physically too big to fit in the place of the original. 0 580 464 040
So I bought another, 0 580 464 068, supposed to be a direct replacement of the superceded original ( now discontinued ).
However, the pump inlet on this one is 12mm instead of 15mm.
Will this be up to the job?, i.e, will it allow sufficient flow rate at full throttle?
It cross-references as a direct replacement for both the Bosch original part no., and the Ford part no. 86 GB-9350-BA stamped on the original pump casing.
If ok, I have a cunning plan to step up the inlet stub pipe to suit the 5/8" i/d hose. ( NOT heater hose!)
It's chucking it down at the moment, so I shall go and look for my blowtorch and soldering flux. They are in my garage.... somewhere!
So I bought another, 0 580 464 068, supposed to be a direct replacement of the superceded original ( now discontinued ).
However, the pump inlet on this one is 12mm instead of 15mm.
Will this be up to the job?, i.e, will it allow sufficient flow rate at full throttle?
It cross-references as a direct replacement for both the Bosch original part no., and the Ford part no. 86 GB-9350-BA stamped on the original pump casing.
If ok, I have a cunning plan to step up the inlet stub pipe to suit the 5/8" i/d hose. ( NOT heater hose!)
It's chucking it down at the moment, so I shall go and look for my blowtorch and soldering flux. They are in my garage.... somewhere!
glenrobbo said:
the pump inlet on this one is 12mm instead of 15mm.
Will this be up to the job?, i.e, will it allow sufficient flow rate at full throttle?
I'd say "yes". Don't know why it is so big, a 5/8" pipe can flow an awful lot of fuel!Will this be up to the job?, i.e, will it allow sufficient flow rate at full throttle?
I have a pre-filter on mine with 1/2" connections "adapted" up to 5/8", no problems
glenrobbo said:
The replacement fuel pump I obtained, Bosch 0580 254 910 ( Capri 2.8 application ) is physically too big to fit in the place of the original. 0 580 464 040
So I bought another, 0 580 464 068, supposed to be a direct replacement of the superceded original ( now discontinued ).
according to bosch, 068 is for a volvo €‚ˆ240/740/760/780/940/960 and flows 110L/h at 250kPa and 040 is for Ford, flows 110L/h at 300kPa so it's not a direct replacement.So I bought another, 0 580 464 068, supposed to be a direct replacement of the superceded original ( now discontinued ).
Whether the volvo pump flows enough fuel at the pressure the ford system runs at I've no idea, there's no graphs of flow rate/pressure in the catalog I found but I've not looked massively hard for them
I hope I have caught you before you get too far into this! The Bosch K jetronic is very sensitive to fuel PRESSURE, I would be as concerned about the pressure the pump is able to maintain as I would be about flow rate.
The pump for the 2.8 Capri should fit, that is the correct one, and one fitted straight on to mine. If it doesnt fit I can only wonder why. We think someone added a non standard fuel filter, did they change the pump and mounting as well? There is nothing clever about the pump bracket and bodging up a pipe bore adaptor is surely harder and more dodgy than a bracket for the pump?
The pump for the 2.8 Capri should fit, that is the correct one, and one fitted straight on to mine. If it doesnt fit I can only wonder why. We think someone added a non standard fuel filter, did they change the pump and mounting as well? There is nothing clever about the pump bracket and bodging up a pipe bore adaptor is surely harder and more dodgy than a bracket for the pump?
greymrj said:
I hope I have caught you before you get too far into this!
Yes, I agree. I recently changed my pump and bought a mid priced MEYLE aftermarket. It was exactly the same size as the old one and it fitted in with no problems at all. I think you should try to get one that fits without needing any changes....pump...
I have been thinking a bit more Glen (have to do it slowly these days!). Next to the fuel pump and directly downsteam of it should be an 'accumulator' which is really a pressure damping device. A metal cylinder, stepped diameter, with just a pipe in and pipe out. Is that present?
Edited by greymrj on Tuesday 12th May 21:57
Morning Richard :-)
Yes the accumulator is fitted, and is supplied by a short pipe from the pump.
I'm installing the 068 & see if Austin likes it. I shall of course do a thorough check for leaks once up & running.
Surely there is a pressure regulator in the K-Jetronic set-up to modify the pump output?
If I have to fit the big one, it'll be a job for my friendly local TVR Tuscan racer, Ivor ( Sarbec ), because I don't have the welding facilities to go relocating mounting brackets.
Fingers crossed, time is getting short.
Yes the accumulator is fitted, and is supplied by a short pipe from the pump.
I'm installing the 068 & see if Austin likes it. I shall of course do a thorough check for leaks once up & running.
Surely there is a pressure regulator in the K-Jetronic set-up to modify the pump output?
If I have to fit the big one, it'll be a job for my friendly local TVR Tuscan racer, Ivor ( Sarbec ), because I don't have the welding facilities to go relocating mounting brackets.
Fingers crossed, time is getting short.
Does it need to be 'injection hose' when it is on the suction of the pump ? Appreciate it needs to not 'suck in' ?
Did we find a supplier for the pipe ? Just dropped my tank out and thinking I might change the pipe out while it is all drained. I swapped it about 10 (?) years ago but can't remember where I got it from, maybe ML Performance. I've checked down the bore and it seems ok though, and no visible distortion. Maybe best to leave well alone !
By the way for reference, I had a couple of 2.8 Capris in my youth and ended up fitting a pump from an XR3i with the smaller inlet size as per thread above. It made absolutely no difference and it still went like a train ! Good old days.
Did we find a supplier for the pipe ? Just dropped my tank out and thinking I might change the pipe out while it is all drained. I swapped it about 10 (?) years ago but can't remember where I got it from, maybe ML Performance. I've checked down the bore and it seems ok though, and no visible distortion. Maybe best to leave well alone !
By the way for reference, I had a couple of 2.8 Capris in my youth and ended up fitting a pump from an XR3i with the smaller inlet size as per thread above. It made absolutely no difference and it still went like a train ! Good old days.
mrufcs1 said:
Does it need to be 'injection hose' when it is on the suction of the pump ? Appreciate it needs to not 'suck in' ?
Being that the hose in that image appears to be labelled 6mm I.D, I'm guessing it's not the supply pipe.Mind you, there shouldn't be any 6mm hose on an S, so maybe it's not even for an S....
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