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Message: [QUOTE="elrodalexander73, post: 1145604, member: 16217"] I don't think its necessarily an extreme pressure, its maintaining pressure at with a larger surface area/cavity to fill, the more fuel we move per shot the more oil needs to be there. Tuning plays a huge part in how much fuel we can move with lots of pressure, HRT can explain this much clearer than I can, the problem I see with it is like he said, the electronic side, creating very precise injection events at very high rpm, at 5000rpm there are something like 42 events per second, thats a very precise event to control. Something even common rail cannot maintain... Thus why the P-pump dominates in the sport of tractor pulling. Swamps has done alot of IDM R&D to help eliminate this high rpm problem where the H.P lives. Too much PW with lots available ICP down low is what snaps our lovely blocks, HRT may be on to the right road here. The P-pumps ability to produce fuel shots precisely with quick rate cams and large 13-14mm p&bs is what we are basically trying replicate with electronics and solenoids... Its a huge hurdle for both common rail and Heui. [/QUOTE]

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