cleansss20 Posted April 8, 2013 Report Share Posted April 8, 2013 Im running lean around 5300rpm. I just put in a walrbo 255 in tank fuel pump and during wot im running 74psi of fuel pressure, but when it gets around 5300 it drops to about 48psi. I just bought a Fuel pump hotwire kit. Should i get a KB boost a pump or flowcharger? Internet links would be nice! Im only running about 7-8lbs of boost and i have FAST 57#injectors so I wouldnt think I would be maxed out on injectors so help would be appreciated. I just want to make sure i get the right boost a pump...it should be the 20A and not the 40A right? Quote Link to comment Share on other sites More sharing options...
detjoe Posted April 8, 2013 Report Share Posted April 8, 2013 what are your using as a FPR? DSC1 or PSC1? Big differance in the air flow. Quote Link to comment Share on other sites More sharing options...
cleansss20 Posted April 8, 2013 Author Report Share Posted April 8, 2013 p1sc. with the 3.85 pulley Quote Link to comment Share on other sites More sharing options...
cleansss20 Posted April 8, 2013 Author Report Share Posted April 8, 2013 and im guessing the fpr is stock? Quote Link to comment Share on other sites More sharing options...
idahoBLKss Posted April 9, 2013 Report Share Posted April 9, 2013 did you check your fuel filter? and is the hotwire kit installed yet? Quote Link to comment Share on other sites More sharing options...
cleansss20 Posted April 9, 2013 Author Report Share Posted April 9, 2013 Yea I changed the filter. I just bought the hotwire kit, it should be in within the next couple of days. I wouldnt think I would have fuel problems with a 255 walbro and p1sc procharger with the 3.85 pulley thats only runnin 6-7# of boost when procharger doesn't even require an upgraded pump for that......I just dont know why im having fuel problems. But I changed the pump to a 255, have the hotwire kit on order, and also got a KB Boost-a-pump. Hopefully this will be the last thing I have to do fuel wise... Quote Link to comment Share on other sites More sharing options...
idahoBLKss Posted April 9, 2013 Report Share Posted April 9, 2013 (edited) yeah i defiantly think its a too much fuel pressure problem after talking to you in the shout last night... if your running 65-70 psi at idle i would think your over pressuring the pump at wot ... just look at this chart and look and see how the pump drops off dramatically with increased pressure . http://www.autoperformanceengineering.com/html/fpspecs.html Edited April 9, 2013 by idahoBLKss (see edit history) Quote Link to comment Share on other sites More sharing options...
rdavid0412 Posted April 9, 2013 Report Share Posted April 9, 2013 Im running the same setup PM me for my number and we can talk. You can look at most of my setup on my build thread too. Quote Link to comment Share on other sites More sharing options...
idahoBLKss Posted April 9, 2013 Report Share Posted April 9, 2013 Im running the same setup PM me for my number and we can talk. You can look at most of my setup on my build thread too. are you running the fmu unit that comes with the procharger kits? Quote Link to comment Share on other sites More sharing options...
rdavid0412 Posted April 10, 2013 Report Share Posted April 10, 2013 are you running the fmu unit that comes with the procharger kits? No Quote Link to comment Share on other sites More sharing options...
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