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sparkle

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13th Mar, 2010 at 09:18:44pm

hi guys, just a quick question- can anyone tell me what current draw there is from a mpi fuel pump so that i can get the right relay, get it wired up and finally get my project mobile? just a bit more bodywork to do then its off to the paint shop. *Clapping* thanks guys

Laurence

66 Posts
Member #: 8258
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14th Mar, 2010 at 07:13:35pm

The fuel pump relay for an MG Metro Turbo is rated @ 40amp which i would imagine is well adequate for the Mpi fuel pump.

Ben H

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3329 Posts
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Melton Mowbray, Pie Country

15th Mar, 2010 at 08:11:10am

Most normal automotive relays will be fine, a fuel pump should only take 2 to 3A.

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stevieturbo

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Northern Ireland

15th Mar, 2010 at 10:29:58am

Most efi pumps draw an absolute max of 10-15A at high pressure for powerful pumps


On a carb/low pressure install, it probably wuld be less than 5A

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


matty

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Aylesbury

4th May, 2010 at 09:25:23pm

Does everyone on here use a relay for the fuel pump?

I currently have one wired in, but im thinking of ditching it to save having to remake the rear loom again, to incorporate some more wires. *oh well*

My switches are rated at 30A so can anyone see a problem not using a relay?

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1/4mile in 13.2sec @ 111 terminal on 15psi

stevieturbo

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Northern Ireland

4th May, 2010 at 11:35:21pm

from an electrical point of view, as long as current demand is safe, then the switch is fine.


many people will use a relay to only allow the pump to run under certain conditions though.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


Sprocket

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Preston On The Brook

4th May, 2010 at 11:55:01pm




On 4th May, 2010 matty said:
Does everyone on here use a relay for the fuel pump?

I currently have one wired in, but im thinking of ditching it to save having to remake the rear loom again, to incorporate some more wires. *oh well*

My switches are rated at 30A so can anyone see a problem not using a relay?


Lol Matty, you really need to let the ECU control the pump, then you save on a switch and you won't forget to switch it on:)

On 26th Oct, 2004 TurboDave16v said:
 Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........

matty

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Aylesbury

5th May, 2010 at 07:54:29pm

I know but, it comes in handy being able to switch off manually sometimes. :)

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1/4mile in 13.2sec @ 111 terminal on 15psi

Johnny

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Accrington

6th May, 2010 at 01:44:31pm

i have my SPI/MPI tank wired in with a toggle switch (without relay) it is fused at 6amps as my switch is only rated at 6amps MAX and it just has a 12v feed from the battery (just after my battery switch). and this has been fine, doesnt get hot at all and has never blown a fuse.
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