graememk
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| posted on 8/7/06 at 10:15 PM |
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fuse rating
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
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RazMan
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| posted on 8/7/06 at 10:55 PM |
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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.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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tks
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| posted on 8/7/06 at 11:37 PM |
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mhh....
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
The above comments are always meant to be from the above persons perspective.
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jambo
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| posted on 8/7/06 at 11:46 PM |
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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]
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MkIndy7
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| posted on 9/7/06 at 12:09 AM |
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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
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tks
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| posted on 9/7/06 at 12:59 AM |
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I would
power such a part from another feed
sow less current..
Tks
The above comments are always meant to be from the above persons perspective.
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paulf
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| posted on 9/7/06 at 07:44 PM |
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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.
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MikeRJ
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| posted on 10/7/06 at 07:08 AM |
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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.
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John Bonnett
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| posted on 12/7/06 at 04:39 PM |
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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
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grusks
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| posted on 12/7/06 at 07:02 PM |
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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)
Need More Money
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chriscook
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| posted on 12/7/06 at 09:42 PM |
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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.
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BKLOCO
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| posted on 13/7/06 at 11:17 AM |
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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]
Experience is what you get when you don't get what you want!!! 
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