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fuse rating
graememk - 8/7/06 at 10:15 PM

running my edis, megasquirt and injection fuel pump al together what fuse rating do you think i currently have a 15amp in atm

but not sure what megasquirt and edis pull power wise

RazMan - 8/7/06 at 10:55 PM

With all of that on the same feed I would go with 20A but you can always see if the 15A blows and just up it if required.

tks - 8/7/06 at 11:37 PM

10Amps should be enough!

Injector with 16ohms is just one amp
a coil is 10amps.

sow with 15 you are there...

20 could do, the fuse is never an resistance.. its just a weak point wich melts...

Tks

jambo - 8/7/06 at 11:46 PM

as you say with the fuel pump, better with the 20
i think fuel the injection fuel pump for the sierra is 20 amp

[Edited on 8/7/06 by jambo]

MkIndy7 - 9/7/06 at 12:09 AM

I'd have a look what the EDIS takes on the donnor and put an in-line fuse for that to step it down, wouldn't have thought the EDIS or Megasquirt would take a fault current of 15 or 20A

tks - 9/7/06 at 12:59 AM

power such a part from another feed


sow less current..

Tks

paulf - 9/7/06 at 07:44 PM

You should use seperate feeds for each one ideally.I have a 20a fuse for the 2 fuelpumps , 2a for the megasquirt and megajolt units and 10a for the injectors.
I also have added the supply for the heated 02 sensor to the fuel pump wiring.
Paul.

MikeRJ - 10/7/06 at 07:08 AM

quote:
Originally posted by tks
10Amps should be enough!

Injector with 16ohms is just one amp
a coil is 10amps.

sow with 15 you are there...

20 could do, the fuse is never an resistance.. its just a weak point wich melts...

Tks


There are 4 injectors and a fuel pump! The fuel pump alone could be drawing up to 6-7Amps.

You shouldn't really mix light consumers (i.e. Megasquirt) and heavy consumers (i.e. pump, injectors) on the same fused circuit, because the light consumer will not be adequately protected in the event of a fault.

Idealy use the megasquirt relay board, then you have separate fused circuits for everything.

John Bonnett - 12/7/06 at 04:39 PM

It is certainly better to have idividual fused supplies and the other point is to make sure the cables used are correctly rated for the load.

John

grusks - 12/7/06 at 07:02 PM

If your've got a decent multimeter.

You can connect up the fuel pump with the meter inline - this will tell you how much it draws.

What ever it draws try to add on 2-5 amps to the fuse ratting ( for when the item is under load)

chriscook - 12/7/06 at 09:42 PM

When I first fired up my loom I put 5A fuses everywhere becuase I was worried about shorts or other problems. I then changed what blew having decided that it was the normal load blowing the fuse. I think the only ones I changed were for the headlights.

BKLOCO - 13/7/06 at 11:17 AM

If it helps I am running a Megasquirt relay board and I currently have:
20A main fuse. (on the incoming supply)
5A in each of the 2 Injector banks.
10A fuel pump (Ex Vauxhall)
10A FIdle valve (in line)
10A Lambda heater (in line)

[Edited on 15-7-06 by BKLOCO]