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Message: [QUOTE="Cold Roller, post: 975408, member: 9551"] Yes. But if you read any of my other posts, I suffer from HPO pressure loss at long pulse widths with warm oil. Cold oil it maintains 4000 psi. Once it warms up I see 3000 psi. I either need a dual HPOP or need to plug the injectors to keep the pressure up. FWIW, on a mid-tune I have no problem with HPO pressure. Once the tune gets above 2.1 ms PW I start to loose some pressure. No, it is not an 8psi drop. The size of the hole at max injector pressure would generate a bit over 8 lbs of force, not psi. It would still be 27,000 psi. Cummins or common rail injectors are completely different. They fire using piezo electronics to allow flow through the injectors. [IMG]http://m.audi-technology-portal.com/var/site/storage/images/atp/antrieb/tdi-motoren/piezo-injektoren/video-piezo-injektoren/11945-4-eng-GB/Video-Piezo-injectors_full_iphone_retina.jpg[/IMG] [/QUOTE]

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