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Message: <blockquote data-quote="JimIII@JDM" data-source="post: 852718" data-attributes="member: 736">Your right the truck wasn't running out of fuel, or wasn't going to even on the stock pump.  We've seen that happen and its around 560+ RWHP.  We usually limit our customers to 550 RWHP for safety sake.   We've never tested the Livernois pump to that point.  When we tested it at 535 RWHP (approximately) on MetroNYC's truck we weren't at the limit of the stock fuel pump but we noticed the flow to be right about what we would see with the stock pump.  That leads me to think it wouldn't support any more power than the stock pump.Now we have only worked on 1 truck in person and 2-3 mail order with this fuel pump upgrade.  Since Livernois has obviously done more can you explain to me what the difference is between the two pumps, how they each flow, their rate, and why it's actually better?  Do you really not need to make any changes in the tuning? Because all you can do is raise the alternator voltage to get more output from the pump, same principal as a boost a pump your just driving it harder than design.  We've never installed a BAP, we've had Zero related Failures in 20 years doing business.JimIII</blockquote>