replace walbro255 with 400
04-03-2013, 06:04 PM
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replace walbro255 with 400
I'm in the process of converting my 5.3 to a 6.0 with boost. I have a trick turbo set up on my 01 gmc 1500 and i guess 10 psi of boost was too much haha oh well ship happens but I'm dropping in my 6.0 after we get done building it and should be somewhere between 6 and 700 rwhp. well when i installed the kit i put a walbro 255 drop in sending unit in with 60lb injectors. now i have a set of 80's and need a fuel pump upgrade. what should i do. still have stock lines and regulator and rails??? can i buy a 400 and direct replace it with the 255?
04-03-2013, 07:24 PM
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no
The drop in unit i bought had a differnt plug then the gm orig. But the new unit came with a pigtail so it could plug in direct. Is that what u mean.? I didnt have to run any new wires or anything and is factory key on/ pump turns on.
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04-03-2013, 09:42 PM
#9
Just did the same swap but converted mine to return cause I have an 04. Pump was direct swap from the 255. I do have the racetronix hotwire kit. And as far as the pump gos my afr holds and currently running 15psi.