Want To Get The Most Out Of My Fuel Pump

[4drftn]

i was reading throught the tutorials and came across changing wiring or running a relay to get a bigger current to go through to make my fuel pump (walbro) to run at full compacity as they are ment to run at 13.something volts... note. i have ran a new earth wire directly to were battery neg. earths on chassis

knowing Q's cant be asked in tutorials i have a few...

if i cut the standard voltage wire powering my pump and put a relay in between, will it increase my voltage? or will i have to have a more direct feed (eg.battery) to get the maximum voltage?

what is the best size relay (if that makes a difference)?

also i will run an inline fuses so i dont damage anything, will it matter putting it after or before the relay? because the inline fuses hold 12v and im not 100% electrics but after the relay is in the voltage after it will increase and blow the inline fuse straight away... will it?

cheers 4drftn

[4drftn]

or will it be ok to use a 10amp glass fuse?

[tacker]

No mate lets answer your questions in order.

1. No just inserting a relay will not increase your voltage to the pump(s).

2. Yes you will have to run cables from your batt to the relay to supply your pump.

3. You will need a 30 amp relay, wont make any more voltage but will be a lot more durable.

4. Your in line fuse can go either before or after the relay, it will not make any difference. And your fuse is not going to worried by voltage, its the amount of current running through your fuse that will melt the fuse if you have a problem. I use a 20 amp fuse for each of my 2 fuel pumps.