jeremybieser Posted August 17, 2016 Report Share Posted August 17, 2016 Looking for info if anyone has ran into this problem... 408 with a D1 and aeromotive 340, 80# injectors, FAST rails.... Ive exceeded the capability of the pump to push enough gas.... At 4400 rpm the fuel starts droppin out, thus not allowing full potential Quote Link to comment Share on other sites More sharing options...
zachm89 Posted August 17, 2016 Report Share Posted August 17, 2016 How much boost are you running? Id say its time to upgrade to a 400/450 walbro and ditch the 340. Quote Link to comment Share on other sites More sharing options...
jeremybieser Posted August 18, 2016 Author Report Share Posted August 18, 2016 16-17 pounds Quote Link to comment Share on other sites More sharing options...
zachm89 Posted August 18, 2016 Report Share Posted August 18, 2016 Yeah I would think it is safe to say that you're out of pump at that level. Either pick up another 340 to drop in the tank as a secondary pump (if a second one will fit, i dont know much about those pumps or their physical size) or upgrade to a bigger single pump like the Walbro 450. Also, have you checked your IDC right before you're running out of fuel? A bigger pump will help the injectors out some but with a 408 and 16-17psi it might be time to start looking into bigger injectors as well if the duty cycles are way up there. Quote Link to comment Share on other sites More sharing options...
jeremybieser Posted August 18, 2016 Author Report Share Posted August 18, 2016 Lookin into the walbro, its more price friendly than a dual 340 setup Quote Link to comment Share on other sites More sharing options...
zachm89 Posted August 19, 2016 Report Share Posted August 19, 2016 I dont know what the rest of your fuel system consists of but if youre still running the stock regulator in the tank its definitely time to upgrade and get rid of that. But with a 408 and that much boost I cant imagine that your fuel system is still stock in tank besides the 340 pump. Quote Link to comment Share on other sites More sharing options...
jeremybieser Posted August 21, 2016 Author Report Share Posted August 21, 2016 340 is rated up to 700hp at the fly, im over 6 at the tires, safe to say ive exceeded the pump lol, my profile has most of my mods listed... Quote Link to comment Share on other sites More sharing options...
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