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Buy an Airdog system and call it a day.....You are playing with fire trying to push it without a good fuel system. Go on my website and look at pics of a CP3 that had the stock lift pump on it and made 500rwhp. It did it once.....:(
It's a VERY expensive mistake.
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im gonna go for the 130gph pump made by jegs. $90, cant beat that. 130gph is better then 0 and if its good for alcohol and methanol, i don't think ulsd will hurt it. the "lift pumps" mad for diesel are nice, and im sure theyl last longer, but i cant justify spending that much.
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btw, duramaxes don't have lift pumps factory. i don't know if that was a mistake or if your more familiar with cummins performance...