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Message: [QUOTE="BrewTown, post: 1566256, member: 31811"] Oh man! After reading many a Charles post over the years, I had a giddy moment to see a new one! This one doesn't disappoint either... I'm following, and I'm imagining the potential. I have a few thoughts/questions I'm imagining you are talking a 'housing' with 4 cam lobes driving 8 unit pumps in the valley. Each having a high pressure line to essentially a mechanical injector in the head. Sounds straight forward in concept. I don't think having injector lines that long would pose a problem would it? I know p-pump guys run into surging issues with larger diameter lines right? The torque figure of 1650 the E7 makes has a caveat, being the 7.3 is ~61% of the 726 cubic inch E7, that power band moves up in the RPM range on the smaller engine to ingest the same amount of air. Everything else constant. Someone more knowledgeable than me, at what point is the anemic head flow neuter the power? Boost fixes some, but actual CFM and fueling rates equaled, they should make the same power. How are the p-pump trucks doing at rpm? In a non turbo calculation, the 7.3 at 2500 rpm uses the same CFM as the E7 at 1500. Just as a reference. Am I right in thinking the 7.3 would make the 1650ft/lbs. at 2500 rpm with equivalent fueling and boost then? In my head, I'm thinking the cam profile to get 50° of advance available, while still having sufficient fuel volume available at low timing may have a long ramp and reduced volume during short duration low timing scenarios. Is a wide rpm range possible with this type of injector? Meaning 500-5000+ rpm? Stroke and volume outputs would be necessary right? I think shifting the entire RPM band up helps this. 1500ft/lbs. at 5252 rpm is 1500hp after all... Would some sort of pressure relief circuit be a fail safe? Set at like 32k or higher? Maybe a solution if you start blowing things up... [/QUOTE]