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Message: [QUOTE="Powerstroke Cowboy, post: 1566090, member: 610"] I've been researching the mack E7 unit pumps. The housing to hold the unit pumps would be massive. Bigger than a v style P-pump. That can be worked around. My biggest concern is, how do you control injection pressure? 400cc of fuel injected at 25k plus psi in a short time would be north of 1000 hp. Another question. I have yet to find a higher flowing unit pump. Unless we can get more fuel than 400cc there's not as much incentive to try the system. It would apper that if the full stock of the unit pump is not being utilized a higher lift cam would increase flow. [/QUOTE]

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