Thomas.B Posted August 12, 2013 Share Posted August 12, 2013 I was thinking that instead of fussing with pulling yet another feed I could just steal from the fuelpump feed. The fuelpumps (dual walbro) have a 30A fuse and I was thinking of using a 25A for the AMP. Just to check I wont run in to issues? Quote Link to comment Share on other sites More sharing options...
chrispot Posted August 12, 2013 Share Posted August 12, 2013 do you mean run the fuel pumps and sub on the same line/ fuse? if so when you have got it up loud with lots of bass there could be a chance that the fuel pumps would not get enough power and risk running weak, and the engine going bang in time with your sub? I would run separate wire for sub. don't get me wrong but your post said you have two walbro pumps and assume that you are running a single turbo? and in my eyes anyone who can fit a single turbo (properly)etc doesn't need to ask this sort of question? regards chris. Quote Link to comment Share on other sites More sharing options...
johnny g Posted August 12, 2013 Share Posted August 12, 2013 Personally, I've always seen amps run with a dedicated power lead from the battery and inline fuse. If you overload the power line and blow the fuse, you're not going anywhere. In silence. Quote Link to comment Share on other sites More sharing options...
listy Posted August 12, 2013 Share Posted August 12, 2013 (edited) Twice in 5 minutes I'm agreeing with Johnny. Take a 0 gauge wire with an inline 50 amp fuse straight from the battery, straight into the amp. It's tried and tested, and you won't get problems. Run the wire through the firewall, down along the passenger door at the bottom (under the trim), behind the rear quarter trim (or under the rear seats) and into the amp. Nice and tidy Edited August 13, 2013 by listy (see edit history) Quote Link to comment Share on other sites More sharing options...
skippyboyo1 Posted August 12, 2013 Share Posted August 12, 2013 100% needs its own power supply, thickest gauge you can get Quote Link to comment Share on other sites More sharing options...
Thomas.B Posted August 13, 2013 Author Share Posted August 13, 2013 There is already a feed well equipt for the fuel pumps. They have a separate fuse of 30A, I was thinkin of sharing the feed and use a smaller fuse (25A) for the AMP. I asked as I do not know how much power the walbro's need, I also have a 180amp alternator so I am not really concerned about power issues more if the feed is big enough. But you guys are correct as usual, I was trying to be lazy and as nothing else has been looked over why start now... cheers Quote Link to comment Share on other sites More sharing options...
Scott Posted August 13, 2013 Share Posted August 13, 2013 25A for the amp? What size is it? A powerful amp will easily need double that, simply divide the wattage of the amp by the voltage (12v) to get the fuse rating required. Quote Link to comment Share on other sites More sharing options...
SupraLEDrears Posted August 13, 2013 Share Posted August 13, 2013 Just NO! Run a dedicated power wire straight to your amp. It's gonna be a hard job, but worth it. Use 0 gauge and if you have any upgrades in future, you're prepared. Quote Link to comment Share on other sites More sharing options...
mellonman Posted August 13, 2013 Share Posted August 13, 2013 its a double no, 1, you could drain the fuel pump feed and run lean or even over load and trip the fuse and brake down. 2. the amp will amp the noise in the power line of the fuel pumps (you should know this as its common of the alernator doing the same thing) Dont be lazy just do it right and there will be less problems to deal with later Quote Link to comment Share on other sites More sharing options...
listy Posted August 13, 2013 Share Posted August 13, 2013 Just NO! Run a dedicated power wire straight to your amp. It's gonna be a hard job, but worth it. Use 0 gauge and if you have any upgrades in future, you're prepared. Why is it a hard job? I got my whole system set up (minus fine tuning) in about an hour. But then, I know what I'm doing. As I said, once the cable is connected to the battery, it's just a case of hiding it behind the trim. Quote Link to comment Share on other sites More sharing options...
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