Recent content by Charles

I think with the reality that ports don't flow into open air and that there is a piston in the way, as air pumps, the 7.3 and the 12v should move air similarly, cylinder per cylinder. I don't agree that having 2 more cylinders will basically wash out. As bad as the 7.3 flows, it should still...

The beauty is..... it's tied to crank.... So no matter what speed you spin it, the fuel goes in the hole in the same degrees crank for the same cc's of fuel... and you move that window forward in time with the SOI timing with the stock Ford timing table. As for comparing the E7 to the 7.3 on...

Try some orifice size vs pressure calculations for how much pressure will move 300cc of diesel in 3ms across a 7 x 12 nozzle. The MEUI or any mech pump for that matter work on the principle of a spill port. If the rack is at shutoff, a P7100 just spills 100% of the fuel right back to the...

I just suggested that a HEUI with a 200 nozzle could easily be running injection pressures in the sub 9k psi range... A 200 nozzle can tow the drivetrain out from under your truck. If a MEUI setup did 30k at 5k, it is entirely likely that it might still far exceed what we have even down at...

The only reason we were fighting the IDM before was because the plunger travel was not tied to the crankshaft rotation. With HEUI the injection rate is pitiful, and independent of rpm. What worked fine at 2000 rpm had nothing driving any urgency by 3000 rpm and it just flatlined. If you...

You size your nozzle for your intended rpm and fueling.

No, the MEUI system is tied to crank rotation, just like a P-pump, so pw keeps dropping as rpm increases for the same fuel quantity to be injected, and fuel pressure keeps climbing until it is either injected... or something snaps or otherwise explodes. Again, just like a P-pump. MEUI is an...

I was doing some blunt pressure vs flow calculations as a reality check for a second, and if you imagined a 7 holer with 0.012" holes....oh, say.... a 200 nozzle.... and you used the specific gravity of diesel fuel, applicable orifice shapes for a nozzle hole, an in-cylinder pressure of say...

I have talked to Joe at Scheid and Ron at Hypermax and everyone else I could think of.... it should work. I have a couple Mack E7 Unit pumps on my desk and drew up a quick Cad drawing for length and it should be roughly 15 inches. That would put you just in front of a turbo in the stock...

I think a pump body to hold the unit pumps together exactly like P&B's on an inline P7100. Hell, the Mack EUP's even have staggered two bolt flanges, just like a barrel. A big ass barrel but that's the meat needed for the pressure. You configure them 4 and 4 in a V with their own cam. Should...

Yeah...... F... common rail. Not interested in playing electrical gymnastics to run a system the truck is NOT already built for, in order to LOSE a few thousand psi and get back to something that has the option to drop pressure again... No thanks. Having fuel injection stroke mechanically...

I cannot express how exciting this concept is.... I have checked, rechecked and checked my math again....MEUI technology IS GOING TO MAKE POWER...... And...... keep engines alive. The STOCK PCM has ALL the tables you need! IT IS MADE FOR UNIT INJECTION! Even with compounds set to go full...

If you injected the full quantity that the stock E7 produces 1650ft/lbs with but sized your nozzle flow to keep it from overpressurizing and blowing up at 6k rpm.... and.... you could squeeze the intake air with some stupid high, well cooled boost and actually fill the cylinders with enough...

To add..... ever DRIVEN a MEUI truck? MEUI is one of the reasons the Cat 3406E is one of the greatest engines ever. Drive one.... it shows.

Injection pressure is a function of plunger travel speed (cam rpm, cam lobe profile) and plunger diameter, vs nozzle orifice flowable area. Welcome to every mech pump on planet earth. I assure you, 400cc delivered at anything approaching 30k psi with just the nozzle stock on the high hp E7...